Details of the Researcher

PHOTO

Nei Kato
Section
Graduate School of Information Sciences
Job title
Professor
Degree
  • 工学博士(東北大学)

  • 工学修士(東北大学)

e-Rad No.
00236168

Research History 8

  • 2003/04 - Present
    大学院情報科学研究科 教授

  • 2021/04 - 2025/03
    Tohoku University Graduate School of Information Sciences Dean

  • 2018/04 - 2021/03
    Tohoku University Graduate School of Information Sciences

  • 2015/10 - 2019/09
    Tohoku University Research Organization of Electrical Communication

  • 2013/04 - 2014/03
    Tohoku University

  • 1996/05 - 2003/03
    東北大学大学院情報科学研究科 助教授

  • 1995/08 - 1996/04
    東北大学大学院情報科学研究科 助手

  • 1991/04 - 1995/07
    東北大学大型計算機センター 助手

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Education 1

  • Tohoku University Graduate School, Division of Engineering 情報工学

    - 1991/03

Committee Memberships 98

  • IEEE Internet of Things Journal Associate Editor-in-Chief

    2013 - Present

  • IEEE Sendai Chapter Chair

    2012 - Present

  • IEEE Wireless Communications Technical Editor

    2006 - Present

  • 電子情報通信学会・特集号編集委員会 編集委員

    2003/04 - Present

  • 電子情報通信学会・衛星通信研究専門委員会 委員

    2000/04 - Present

  • IEEE Transactions on Vehicular Technology Editor-in-Chief

    2017 - 2021

  • IEEE Communications Society Vice President

    2017 - 2021

  • IEEE Transactions on Computers Associate Editor

    2015 - 2019

  • IEEE WCNC’12 Steering Committee Member

    2012 - 2018

  • IEEE Communications Society Awards Committee 委員

    2015 - 2017

  • IEEE Network Magazine Editor-in-Chief

    2015 - 2017

  • IEEE Transactions on Vehicular Technology Area Editor

    2014 - 2017

  • IEEE アドホック&センサーネットワーク技術委員会 委員長

    2014/04 - 2016/03

  • IEEE Computer Society Award Committee 委員

    2015 - 2016

  • IEEE COMSOC Member-at-Large on the Board of Governors

    2014 - 2016

  • IEEE Communications Society ボードメンバー

    2014 - 2016

  • IEEE Transactions on Emerging Topics in Computing Associate Editor

    2014/04 - 2015/03

  • Ad Hoc & Sensor Networks TC of IEEE COMSOC Chair

    2014 - 2015

  • IEEE Vehicular Technology Society Distinguished Lecturer

    2014 - 2015

  • IEEE GLOBECOM/ICC Technical Content(GITC) Member

    2012 - 2015

  • IEEE Transactions on Emerging Topics in Computing SI on Cyber-Physical Systems (CPS) Part Guest Editor

    2012/04 - 2014/03

  • IEEE Network Magazine Associate Editor-in-Chief

    2013 - 2014

  • IEEE Trans. on Parallel and Distributed Systems Associate Editor-in-Chief:

    2013 - 2014

  • IEEE Network Magazine Editor

    2012 - 2014

  • IEEE Communications Society (COMSOC) Distinguished Lecturer

    2012 - 2014

  • IEEE Transactions on Parallel and Distributed Systems (TPDS) Editor

    2011 - 2014

  • IEEE Trans. on Vehicular Technology Associate Editor

    2010 - 2014

  • IEEE Ad Hoc & Sensor Networks Technical Committee Vice-Chair

    2012 - 2013

  • IEEE Trans. on Wireless Communications Editor

    2009 - 2013

  • IEEE Satellite and Space Communications Technical Committee 衛星・宇宙通信技術専門委員会 委員長

    2010/07 - 2012/06

  • IEEE Ad Hoc & Sensor Networks Technical Committee Secretary

    2010/07 - 2012/06

  • IEICE Technical Committee on Satellite Communications Chair

    2011 - 2012

  • IEEE Satellite and Space Communications TC Chair

    2010 - 2012

  • IEEE ICC 2010 Symposium Chair

    2010/04 - 2011/03

  • IEEE Wireless Communications Magazine Special Issue Co-Guest-Editor

    2010/04 - 2011/03

  • 電子情報通信学会 衛星通信実験とその応用技術特集号 幹事

    2010/04 - 2011/03

  • 電子情報通信学会 和文論文誌編集委員

    2010/04 - 2011/03

  • IEEE Ad hoc & Sensor Networks Technical Committee (TC) Secretary

    2009 - 2011

  • IEICE Member of Satellite Communication Technical committee

    2000 - 2011

  • Wiley International Journal of Communications Systems Associate Editor

    2006 - 2010

  • Wiley Security and Communication Networks Advisory Board Member

    2006 - 2010

  • IEICE Member of Communication System Technical Committee

    2001 - 2010

  • IEEE WiMob Technical Program Committee

    2008/04 - 2009/03

  • 電子情報通信学会・通信方式研究専門委員会 委員

    2001/05 - 2006/04

  • Journal of Communications and Networks, Special Issue on Broadband Convergence Networks ゲストエディタ

    2005/04 - 2006/03

  • 電子情報通信学会・英文論文誌B編集委員会 委員

    2002/07 - 2005/06

  • 電子情報通信学会・学会誌編集委員会 委員

    1997/05 - 1999/05

  • IEEE ICCC Executive General Chair

    2020 -

  • The 15th IEEE International Conference on Trust, Security and Privacy in Computing and Communications (IEEE TrustCom-16) General Chair

    2016 -

  • IEEE Computer Society Fellow Committee Vice Chair

    2016 -

  • IEEE WCNC 2015 Symposium Co-Chair

    2015 -

  • IEEE GLOBECOM 2015 GITC Advisor

    2015 -

  • IEEE Internet of Things Journal SI on "Things" as Intelligent Sensors and Actuators in the Users's Context: Processing and Communications Issues Guest Editor

    2015 -

  • IEEE ICC 2014 TPC Vice Chair

    2014 -

  • IEEE Trust Com 2014 Symposium Chair

    2014 -

  • IEEE SmartGridComm 2014 Symposium Co-Chair

    2014 -

  • IEEE GLOBECOM 2013 Symposium Co-chair(Wireless Networking Symposium)

    2013/12 -

  • IEEE GLOBECOM 2012 Symposia Chair Symposia Chair

    2012/12 -

  • IEEE ICC 2012 Symposium Chair(Wireless Networking) Symposium Chair

    2012/05 -

  • IEICE SI on Satellite Communication Technologies in Conjunction with Main Topics of JC-SAT2011 Guest Editor-in-Chief

    2012 -

  • IEEE GLOBECOM’12 Symposium Co-Chair

    2012 -

  • IEEE ICCC’12 Symposium Co-Chair

    2012 -

  • Ad Hoc, Sensor and Mesh Networking Symposium, IEEE ICC’12 Symposium Co-Chair

    2012 -

  • IEEE GLOBECOM 2012 Symposium Co-chair(Wireless Networking Symposium)

    2012 -

  • IEEE WCNC’11 TPC Vice Chair, Network Track

    2011 -

  • IEEE ICC’11 Ad hoc & Sensor Network Symposium Co-Chair

    2011 -

  • IEEE Transactions on Parallel and Distributed Systems (TPDS) Special Issue (SI) on Cyber-Physical Systems (CPS) Guest Editor

    2011 -

  • IEEE Wireless Communications Magazine Special Issue "User Cooperation for Wireless Networks" Guest Editor

    2011 -

  • Ad hoc & Sensor Network Symposium, IEEE ICC’10 Co-Chair

    2010 -

  • IEEE WCNC 2010 TPC Vice Chair

    2010 -

  • VTC2010-Fall Workshop Co-chair

    2010 -

  • IEEE Asia Pacific Board Vice Chair

    2010 -

  • Wiley Inter Science Special Issue Editor

    2010 -

  • JCN Special Issue Co-Guest-Editor

    2010 -

  • 電子情報通信学会 衛星通信研究専門委員会 副委員長

    2010 -

  • 電子情報通信学会 ネットワークシステム研究専門委員会委員

    2010 -

  • 電子情報通信学会 学生論文特集号 編集委員

    2010 -

  • IEEE Wireless Communications Technical Editor

    2010 -

  • IEEE Trans. on Wireless Communications Editor

    2010 -

  • CHINACOM’09 Co-Chair

    2009 -

  • ACCESSNETS Workshop Co-chair

    2009 -

  • China Com Wireless Communications and Networking Symposium Co-chair

    2008 -

  • 電子情報通信学会・和文論文誌編集委員会 委員

    2008 -

  • IEICE Trans. on Communications Editor

    2008 -

  • IEEE Wireless Communications Magazine Special Issue Guest-Editor

    2008 -

  • IEEE GLOBECOM 2007 Internet Protocol Symposium Co-chair

    2007 -

  • IEEE HPSR Technical Program Committee

    2007 -

  • Wiley Security and Communication Networks Editor

    2007 -

  • Wiley International Journal of Communication Systems Editor

    2007 -

  • 電子情報通信学会・ネットワークシステム研究専門員会 委員

    2006/05 -

  • 電子情報通信学会 通信方式研究専門委員会委員

    2006/04 -

  • IEEE ICC Technical Program Committee

    2006/04 -

  • IEEE WCNC Technical Program Committee

    2005/04 -

  • Broadband Convergence Networks Co-Guest Editor of the Special Issue on Broadband Convergence Networks (BCN) (Journal of Communications and Networks)

    2005 -

  • IEICE Transactions of Communications Associate Editor of the Special Issue on Recent Fundamental Technologies for Broadband Satellite Communications (IEICE Transactions of Communications)

    2005 -

  • IEEE GLOBECOM Technical Program Committee

    2005 -

  • IEEE MASS Technical Program Committee

    2005 -

  • IEICE Transactions of Communications Associate Editor of the Special Issue on Recent Fundamental Technologies for Broadband Satellite Communications (IEICE Transactions of Communications)

    2003 -

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Professional Memberships 3

  • IEEE

  • 情報処理学会

  • 電子情報通信学会

Research Interests 12

  • スマートグリッド

  • アドホック&センサー&メッシュネットワーク

  • ネットワークセキュリティ

  • V2Xネットワーク

  • 無線ネットワーク

  • ビッグデータ

  • IoT

  • AI

  • 衛星通信ネットワーク

  • パターン認識

  • 情報セキュリティ

  • 情報ネットワーク、情報セキュリティ、パターン認識、衛星通信ネットワーク

Research Areas 7

  • Informatics / Information networks / Machine learning, Deep learning based network control

  • Informatics / Information networks / Resilient networks

  • Informatics / Information networks / Optical and wireless integrated networks

  • Informatics / Information networks / Mobile, ad hoc, and sensor networks

  • Informatics / Information networks / Satellite networks

  • Informatics / Information networks / Unmanned Aerial Vehicular (UAV) networks

  • Informatics / Intelligent informatics / Intelligent Informatics.

Awards 74

  1. Asia-Pacific Outstanding Paper Award Winners

    2020/12 IEEE Communications Society IEEE Communications Society

  2. Best Paper Award

    2020/06 IEEE International Conference on Communications 2020 IEEE International Conference on Communications (ICC 2020)

  3. Network System Research Award

    2020 IEICE IEICE Network System Research Award

  4. Satellite Communications Research Award

    2020 IEICE IEICE Satellite Communications Research Award

  5. 2020 Highly Cited Researcher in Computer Science field

    2020 Clarivate Analytics 2020 Highly Cited Researcher in Computer Science field

  6. ASIA-PACIFIC BOARD BEST PAPER AWARD

    2020/01 IEEE COMMUNICATION SOCIETY IEEE COMMUNICATION SOCIETY ASIA-PACIFIC BOARD

  7. Certificate of appreciation

    2019/12 IEEE Communications Society IEEE Communications Society

  8. The best paper of 2018

    2019/11 IEEE Transactions on Computers IEEE Transactions on Computers

  9. WCSP 10-Year Anniversary Excellent Paper Award

    2019/10 The International Conference on Wireless Communication and signal Processing Organizing Committee The International Conference on Wireless Communication and signal Processing Organizing Committee

  10. 2019 Distinguished Technical Achievement Recognition Award

    2019/05 IEEE Communications Society Green Communications & Computing Technical Committee IEEE Communications Society Green Communications & Computing Technical Committee

  11. Best Paper Award

    2019 IEEE Global Communications Conference (GLOBECOM’19)

  12. 2019 Highly Cited Researcher in Computer Science field

    2019 Clarivate Analytics

  13. Best Paper Award

    2018/08 IEEE International Conference on Network Infrastructure and Digital Content 2018 6th IEEE International Conference on Network Infrastructure and Digital Content (IEEE IC-NIDC 2018)

  14. Certificate of Appreciation

    2018/07 EAI MLICOM 3rd EAI International Conference on Machine Learning and Intelligent Communications

  15. 総務省東北総合通信局長表彰

    2018/06 Ministry of Internal Affairs and Communications 第68回「電波の日」東北総合通信局長表彰

  16. Best Paper Award

    2018/05 IEEE International Conference on Communications 2018 IEEE International Conference on Communications (ICC 2018)

  17. Prize for Science and Technology

    2018/04 Minister of Education, Culture, Sports, Science and Technology, Japan

  18. Best Paper Award

    2018 IEEE Global Communications Conference (GLOBECOM’18)

  19. Fellow of The Engineering Academy of Japan

    2018 The Engineering Academy of Japan

  20. Certificate of Appreciation

    2018/01 IEEE Communications Society IEEE Communications Society

  21. Best Paper Award

    2017/12 IEEE Communications Society 2017 IEEE Global Communications Conference (GLOBECOM 2017)

  22. Outstanding Paper Award

    2017/12 IEEE Communications Society 2017 IEEE ComSoc AP

  23. Certificate of Appreciation

    2017/12 IEEE Communications Society The 2017 International Conference on Wireless Internet (WICON '17)

  24. Best Paper Award

    2017/09 IEEE Communications Society IEEE VTC2017-Fall Workshop – Networked Vehicles for Intelligent Transportation and Smart Grids (NetV)

  25. Best Paper Award

    2017/05 IEEE Communications Society IEEE International Conference on Communications (ICC2017)

  26. Asia-Pacific Outstanding Paper Award

    2017 IEEE Communications Society

  27. Keynote Speech Recognition

    2016/12 IEEE Communications Society 22nd IEEE International Conference on Parallel and Distributed Systems (ICPADS 2016)

  28. Best Paper Award

    2016/09 IEEE Communications Society 2016 5th IEEE International Conference on Network Infrastructure and Digital Content (IEEE IC-NIDC 2016)

  29. 感謝状

    2016/08 フィリピン・セブ島サンレミジオ市長

  30. Best Paper Award

    2016/05 IEEE Communications Society IEEE 83rd Vehicular Technology Conference (VTC2016-Spring)

  31. IEEE Communications Society Ad Hoc & Sensor Networks 技術委員会 2016 OUTSTANDING SERVICE & LEADERSHIP RECOGNITION AWARD

    2016/04 IEEE

  32. Best Paper Award

    2016 IEEE Global Communications Conference (GLOBECOM’16)

  33. Best Paper Award

    2016 IEEE International Conference on Communications "GHAR: Graph-based Hybrid Adaptive Routing for Cognitive Radio Based Disaster Response Networks"

  34. Best Paper Award

    2016 International Conference on Communications "A Mobility-Based Mode Selection Technique for Fair Spatial Dissemination of Data in Multi-Channel Device-to-Device Communication"

  35. IEEE/CIC International Conference on Communications in China 最優秀論文賞

    2015/11 IEEE CIC

  36. International Conference on Wireless Communications and Signal Processing 最優秀論文

    2015/10 IEEE

  37. IEEE GLOBECOM 最優秀論文賞

    2014/12 IEEE

  38. International Conference on Wireless Communications and Signal Processing 最優秀論文賞

    2014/10 IEEE

  39. IEEE International Conference on Network Infrastructure and Digital Content 最優秀論文賞

    2014/09 IEEE

  40. International Symposium on Performance Evaluation of Computer and Telecommunication Systems 最優秀論文賞

    2014/07 Society for Modeling & Simulation International (SCS)

  41. 総務省東北総合通信局長表彰

    2014/06/01 総務省

  42. IEEE Wireless Communications and Networking Conference 最優秀論文賞

    2014/04 IEEE

  43. Best Paper Award

    2014 International Conference on Wireless Communications and Signal Processing (WCSP’14) International Conference on Wireless Communications and Signal Processing (WCSP’14) Best Paper Award

  44. Best Paper Award

    2014 IEEE International Conference on Trust, Security and Privacy in Computing and Communications 13th IEEE International Conference on Trust, Security and Privacy in Computing and Communications (TrustCom’14) Best Paper Award

  45. IEEE GLOBECOM 最優秀論文賞

    2013/12 IEEE

  46. The 9th IEEE International wireless Communications and Mobile Computing Conference (IWCMC 2013) Best Paper Award

    2013/07 IEEE

  47. 電子情報通信学会2012年度衛星通信研究賞

    2013/05 電子情報通信学会

  48. IEEE Fellow

    2013/04 IEEE

  49. IEEE VTC 2013-Spring Conference's Best Satellite Networks and Positioning Track Paper最優秀論文賞

    2013/03 IEEE VTS

  50. 電子情報通信学会フェロー

    2012/09 電子情報通信学会

  51. 電子情報通信学会活動功労賞

    2012/09 電子情報通信学会

  52. 電子情報通信学会功労顕彰状

    2012/09 電子情報通信学会

  53. 電子情報通信学会通信ソサイエティ論文賞

    2012/05 電子情報通信学会

  54. 電子情報通信学会2011年度衛星通信研究賞

    2012/05 電子情報通信学会

  55. 電子情報通信学会 2011年度衛星通信研究賞

    2012/05 電子情報通信学会

  56. IEEE Wireless Communications and Networking Conference 最優秀論文賞

    2012/03 IEEE

  57. KDDI財団優秀研究賞

    2012/03 KDDI財団

  58. IEEE Wireless Communications and Networking Conference (WCNC 2012) Best Paper Award

    2012/03 IEEE Communications Society

  59. IEEE VTS Certificate of Appreciation as a Top Associate Editor

    2012/01 IEEE VTS

  60. Certificate of Appreciation for Sensor and Mesh Networking symposium Co-Chair at IEEE ICC 2011, kyoto, Japan

    2011/05 IEEE Communications Society

  61. 電子情報通信学会 2011年度衛星通信研究賞

    2011/05 電子情報通信学会

  62. IEEE Global Communications Conference Exhibition & Industry Forum (GLOBECOM 2010) , the IEEE GLOBECOM 2010 Best Paper Award

    2010/12 IEEE

  63. Certificate of Appreciation for Sensor and Mesh Networking symposium Co-Chair at IEEE ICC 2010, Cape Town, South Africa

    2010/09 IEEE

  64. Certificate of Appreciation for Network symposium Vice-Chair at IEEE WCNC 2010, Sydney, Australia

    2010/07 IEEE

  65. Best paper award (Wireless Networking Symposium)

    2010 IEEE GLOBECOM’10

  66. Best paper award (Ad Hoc and Sensor Networking Symposium)

    2010 IEEE GLOBECOM’10

  67. ACM 5th Wireless Communications and Mobile Computing Conference 最優秀論文賞

    2009/06 ACM

  68. ネットワークシステム研究賞

    2009/03/02 社団法人 電子情報通信学会

  69. 第23回電気通信普及財団テレコムシステム技術賞

    2008/03 財団法人 電気通信普及財団

  70. 第6回船井情報科学振興賞

    2007/06 船井情報科学振興財団

  71. 2005 Distinguished Contributions to Satellite Communication Award

    2005/10 IEEE Communication Society,Satellite and Space Communication Technical Committee

  72. 財団法人 石田記念財団研究奨励賞

    2003/11 財団法人 石田記念財団

  73. The 7th World Multi-Conference on Systemics, Cybermetics, and Information (SCI 2003) ベストペーパー賞

    2003/10 SCI Organizing

  74. 情報処理学会東北支部奨励賞

    1994/05/11 情報処理学会東北支部 平成5年度電気関係学会東北支部連合大会での研究発表

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Papers 574

  1. Evaluating C/N and BER in FSO Vehicular-HAP-Satellite Links Under Rain and Cloud Scattering

    Reham Wafaee Ibrahim, Tiago Koketsu Rodrigues, Nei Kato, Masayuki Ariyoshi

    IEEE Wireless Communications Letters 14 (7) 1874-1878 2025/07

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/lwc.2025.3556742  

    ISSN: 2162-2337

    eISSN: 2162-2345

  2. Combined Control of Coverage Area and HAPS Deployment in Hybrid FSO/RF SAGIN

    Kazuma Mashiko, Yuichi Kawamoto, Nei Kato, Kohei Yoshida, Masayuki Ariyoshi

    IEEE Transactions on Vehicular Technology 74 (7) 10819-10828 2025/07

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tvt.2025.3546335  

    ISSN: 0018-9545

    eISSN: 1939-9359

  3. 6G Comprehensive Intelligence: Network Operations and Optimization Based on Large Language Models

    Sifan Long, Fengxiao Tang, Yangfan Li, Tiao Tan, Zhengjie Jin, Ming Zhao, Nei Kato

    IEEE Network 39 (4) 192-201 2025/07

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/mnet.2024.3470774  

    ISSN: 0890-8044

    eISSN: 1558-156X

  4. Prediction-based Task Allocation and Processor Control for Distributed Green Data Centers with Optical Satellite Links

    Hiroto Oshima, Hiroaki Hashida, Yuichi Kawamoto, Nei Kato, Kazushi Sugyo, Yohei Hasegawa, Masayuki Ariyoshi

    The 2025 IEEE 101th Vehicular Technology Conference (VTC2025-Spring) 2025/06

  5. Bundle Transmission Control in Multi-Source Delay/Disruption Tolerant Near-Earth Satellite Networks for Improved Delivery Ratio

    Kazuma Mashiko, Hiroaki Hashida, Yuichi Kawamoto, Nei Kato, Yohei Hasegawa, Masayuki Ariyoshi

    The 2025 IEEE 101th Vehicular Technology Conference (VTC2025-Spring) 2025/06

  6. Max-Min Fairness in Intelligent Reflecting Surface-aided Multi-Operator Networks with Cooperative Passive Beamforming

    Hiroaki Hashida, Yuichi Kawamoto, Nei Kato

    The 2025 IEEE 101th Vehicular Technology Conference (VTC2025-Spring) 2025/06

  7. Empirical Analysis of Statistical Variation in Channel Data of WiGig Networks towards 6G

    Shikhar Verma, Tiago Koketsu Rodrigues, Nei Kato, Mostafa M. Fouda, Muhammad Ismail

    The 2025 IEEE 101th Vehicular Technology Conference (VTC2025-Spring) 2025/06

  8. Environment-aware Beam Selection for Efficient Codebook Design in IRS-assisted Communications

    Yugo Tanabu, Hiroaki Hashida, Yuichi Kawamoto, Nei Kato, Takumi Yoneda, Tomoki Murakami

    IEEE International Conference on Communications (ICC 2025) 2025/06

  9. Deep Reinforcement Learning for Optimizing Multi-Hop Distributed Collaborative Task Offloading in R2X

    Wei Zhao, Tangjie Weng, Yu Cheng, Zhi Liu, Nei Kato

    IEEE Transactions on Vehicular Technology 74 (6) 9533-9548 2025/06

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tvt.2025.3538165  

    ISSN: 0018-9545

    eISSN: 1939-9359

  10. Enhancing Indoor THz Multi-AP Joint Transmission With IRS: A Clustering and Kalman Filtering Approach for Mobile User

    Yishi Zhu, Yuichi Kawamoto, Nei Kato, Kazuto Yano, Toshikazu Sakano

    IEEE Transactions on Cognitive Communications and Networking 11 (3) 1752-1761 2025/06

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tccn.2024.3496873  

    eISSN: 2332-7731 2372-2045

  11. PPO Based Task Offloading With EKF for Position Prediction in RSU-Assisted IoV

    Wei Zhao, Peng Gao, Xudong Hong, Xiao Zheng, Nei Kato

    IEEE Transactions on Cognitive Communications and Networking 1-1 2025/04

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tccn.2025.3561209  

    eISSN: 2332-7731 2372-2045

  12. Prediction-Based Link Selection With Machine Learning in HAP-Assisted FSO Networks

    Norranat Songsriboonsit, Tiago Koketsu Rodrigues, Yuichi Kawamoto, Yasutaka Yamashita, Marika Morikawa, Nei Kato

    IEEE Wireless Communications Letters 14 (4) 1024-1028 2025/04

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/lwc.2025.3530481  

    ISSN: 2162-2337

    eISSN: 2162-2345

  13. Routing for Space-Air-Ground Integrated Network With GAN-Powered Deep Reinforcement Learning

    Qi Guo, Fengxiao Tang, Nei Kato

    IEEE Transactions on Cognitive Communications and Networking 11 (2) 914-922 2025/04

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tccn.2024.3522579  

    eISSN: 2332-7731 2372-2045

  14. MSFL: Model-Safeguarded Federated Learning With Intelligent Reflecting Surface for Industrial Networks

    Yingying Wu, Bomin Mao, Nei Kato

    IEEE Transactions on Network and Service Management 22 (2) 1019-1028 2025/04

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tnsm.2024.3496502  

    eISSN: 1932-4537 2373-7379

  15. Optimizing Secrecy Rate for Federated Learning Model Aggregation With Intelligent Reflecting Surface Toward 6G Ubiquitous Intelligence

    Bomin Mao, Yingying Wu, Jiajia Liu, Hongzhi Guo, Jiadai Wang, Nei Kato

    IEEE Transactions on Cognitive Communications and Networking 11 (2) 1258-1267 2025/04

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tccn.2024.3454256  

    eISSN: 2332-7731 2372-2045

  16. IRS-Aided Near-Field Communication: Prospects and Challenges with Codebook Approach

    Ryuhei Hibi, Hiroaki Hashida, Yuichi Kawamoto, Nei Kato

    IEEE Wireless Communications 1-6 2025/03

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/mwc.010.2400251  

    ISSN: 1536-1284

    eISSN: 1558-0687

  17. Advancing RSU-assisted Automated Vehicle Networks: A DRL Empowered Distributed Task Offloading Framework

    Wei Zhao, Yu Cheng, Zhi Liu, Nei Kato

    IEEE Network 39 (2) 242-249 2025/03

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/mnet.2024.3449851  

    ISSN: 0890-8044

    eISSN: 1558-156X

  18. Frequency Prism-based Beamforming and Resource Allocation in LEO Satellite Networks with Delay Adjustable IRS

    Shuta Sekimori, Hiroaki Hashida, Yuichi Kawamoto, Nei Kato, Kohei Yoshida, Masayuki Ariyoshi

    International Conference on Computing, Networking and Communications (ICNC 2025) 2025/02

  19. Outage Probability, Performance, and Fairness Analysis of Space–Air–Ground Integrated Network (SAGIN): UAV Altitude and Position Angle

    Jingjing Tan, Fengxiao Tang, Ming Zhao, Nei Kato

    IEEE Transactions on Wireless Communications 24 (2) 940-954 2025/02

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/twc.2024.3503060  

    ISSN: 1536-1276

    eISSN: 1558-2248

  20. Asynchronous DRL-Based Multi-Hop Task Offloading in RSU-Assisted IoV Networks

    Wei Zhao, Yu Cheng, Zhi Liu, Xuangou Wu, Nei Kato

    IEEE Transactions on Cognitive Communications and Networking 11 (1) 546-555 2025/02

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tccn.2024.3417609  

    eISSN: 2332-7731 2372-2045

  21. A Survey on DRL Based UAV Communications and Networking: DRL Fundamentals, Applications and Implementations

    Wei Zhao, Shaoxin Cui, Wen Qiu, Zhiqiang He, Zhi Liu, Xiao Zheng, Bomin Mao, Nei Kato

    IEEE Communications Surveys & Tutorials 1-1 2025

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/comst.2025.3581912  

    eISSN: 1553-877X 2373-745X

  22. FCSQF: Flexible Traffic Control for ECT-aware Time Sensitive Networking

    Zhuangye Luo, Feng Zeng, Fengxiao Tang, Nei Kato

    IEEE Transactions on Network Science and Engineering 1-13 2025

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tnse.2025.3569897  

    eISSN: 2327-4697 2334-329X

  23. Channel Estimation Overhead Reduction and AP/IRS Allocation Optimization in Joint Transmission-Enabled WLAN

    Tatsuya Nakazato, Kawamoto Yuichi, Nei Kato

    IEEE Transactions on Network Science and Engineering 1-10 2025

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tnse.2025.3569382  

    eISSN: 2327-4697 2334-329X

  24. Spectral-Efficient Dynamic User Association in LEO Satellite Constellation-HAPS Cooperative Networks

    Kazuma Mashiko, Hiroaki Hashida, Yuichi Kawamoto, Nei Kato, Kohei Yoshida, Masayuki Ariyoshi

    IEEE Transactions on Cognitive Communications and Networking 1-1 2025

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tccn.2025.3569603  

    eISSN: 2332-7731 2372-2045

  25. A Survey on Applications of Large Language Model-Driven Digital Twins for Intelligent Network Optimization

    Zhiqi Guo, Fengxiao Tang, Linfeng Luo, Ming Zhao, Nei Kato

    IEEE Communications Surveys & Tutorials 1-1 2025

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/comst.2025.3568637  

    eISSN: 1553-877X 2373-745X

  26. Deep Q-Learning-Driven Frequency Prism Beamforming With Delay-Adjustable IRS in LEO Satellite Networks

    Shuta Sekimori, Hiroaki Hashida, Yuichi Kawamoto, Nei Kato, Kohei Yoshida, Masayuki Ariyoshi

    IEEE Transactions on Cognitive Communications and Networking 1-1 2025

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tccn.2025.3567094  

    eISSN: 2332-7731 2372-2045

  27. MPITE: Multidimensional Performance Evaluator for Interpretable and Traceable Network Performance Evaluation

    Xun Yuan, Xiaonan Wang, Fengxiao Tang, Qingping Zhou, Ming Zhao, Nei Kato

    IEEE Transactions on Networking 1-16 2025

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/ton.2025.3562348  

    eISSN: 2998-4157

  28. Improving Data Collection Efficiency of UAV-Assisted LoRa Networks via Directivity-Aware Link Model

    Jiaqi Zhang, Xiaolong Zheng, Ruinan Li, Liang Liu, Huadong Ma, Nei Kato

    IEEE Transactions on Networking 1-16 2025

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/ton.2025.3559889  

    eISSN: 2998-4157

  29. A Blockchain-enabled Cold Start Aggregation Scheme for Federated Reinforcement Learning-based Task Offloading in Zero Trust LEO Satellite Networks

    Bomin Mao, Yangbo Liu, Zixiang Wei, Hongzhi Guo, Yijie Xun, Jiadai Wang, Jiajia Liu, Nei Kato

    IEEE Journal on Selected Areas in Communications 1-1 2025

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/jsac.2025.3560003  

    ISSN: 0733-8716

    eISSN: 1558-0008

  30. Mathematical Modeling and Deployment Optimization: Intelligent Reflecting Surface-aided Communications Under Partial Blockages

    Hiroaki Hashida, Yuichi Kawamoto, Nei Kato

    IEEE Transactions on Cognitive Communications and Networking 1-1 2025

    DOI: 10.1109/TCCN.2025.3534142  

  31. A Survey on Intelligent Network Operations and Performance Optimization Based on Large Language Models

    Sifan Long, Jingjing Tan, Bomin Mao, Fengxiao Tang, Yangfan Li, Ming Zhao, Nei Kato

    IEEE Communications Surveys & Tutorials 1-1 2025

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/comst.2025.3526606  

    eISSN: 1553-877X 2373-745X

  32. Concept Drift Aware Wireless Key Generation in Dynamic LiFi Networks

    Elmahedi Mahalal, Eslam Hasan, Muhammad Ismail, Zi-Yang Wu, Mostafa M. Fouda, Zubair Md Fadlullah, Nei Kato

    IEEE Open Journal of the Communications Society 6 742-758 2025

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/ojcoms.2024.3524497  

    eISSN: 2644-125X

  33. On a Hierarchical Content Caching and Asynchronous Updating Scheme for Non-Terrestrial Network-Assisted Connected Automated Vehicles

    Bomin Mao, Yangbo Liu, Hongzhi Guo, Yijie Xun, Jiadai Wang, Jiajia Liu, Nei Kato

    IEEE Journal on Selected Areas in Communications 43 (1) 64-74 2025/01

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/jsac.2024.3460063  

    ISSN: 0733-8716

    eISSN: 1558-0008

  34. Efficient Coverage Area Control in Hybrid FSO/RF Space-Air-Ground Integrated Networks

    Kazuma Mashiko, Yuichi Kawamoto, Nei Kato, Masayuki Ariyoshi, Kazushi Sugyo, Junichi Funada

    IEEE Global Communications Conference (GLOBECOM 2024) 2024/12

  35. Handover-skipping for Maximizing Communication Capacity of Ground - eVTOL Links Considering Air Cell Interference

    Daisuke Matsuura, Yuichi Kawamoto, Nei Kato

    IEEE Global Communications Conference (GLOBECOM 2024) 2024/12

  36. Optimization of Intelligent Reflecting Surface Dimensions Under Partial Blockages

    Hiroaki Hashida, Yuichi Kawamoto, Nei Kato

    The 24th IEEE International Conference on Scalable Computing and Communications (ScalCom 2024) 2024/12

  37. Hierarchical Exploration and Machine Learning With Exploration Results for Autonomous Control of Standalone-Intelligent Reflecting Surface

    Ryuhei Hibi, Hiroaki Hashida, Yuichi Kawamoto, Nei Kato

    The 24th IEEE International Conference on Scalable Computing and Communications (ScalCom 2024) 2024/12

  38. An Efficient Beam Searching in Hybrid Intelligent Reflecting/Refracting Surfaces (IRS)-Aided mmWave 6G Network

    Shikhar Verma, Yuichi Kawamoto, Nei Kato, Takahiro Saiwai, Masamichi Yonehara

    IEEE Transactions on Vehicular Technology 73 (12) 19299-19312 2024/12

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tvt.2024.3450914  

    ISSN: 0018-9545

    eISSN: 1939-9359

  39. Interference Suppression in HAPS-Based Space-Air-Ground Integrated Networks Using a Codebook-Based Approach

    Yuichi Kawamoto, Yuto Okawara, Shikhar Verma, Nei Kato, Kazuma Kaneko, Ayaka Sata, Mari Ochiai

    IEEE Transactions on Vehicular Technology 73 (12) 19252-19262 2024/12

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tvt.2024.3446999  

    ISSN: 0018-9545

    eISSN: 1939-9359

  40. Challenges and Machine Learning Solutions for Optical Communications in Space-Air-Ground Integrated Networks for 6G

    Masayuki Ariyoshi, Junichi Funada, Emmanuel Le Taillandier de Gabory, Shigeru Asai, Tiago Koketsu Rodrigues, Yuichi Kawamoto, Nei Kato

    IEEE Wireless Communications 31 (6) 21-28 2024/12

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/mwc.015.2300598  

    ISSN: 1536-1284

    eISSN: 1558-0687

  41. Communication-Efficient and Privacy-Preserving Federated Learning via Joint Knowledge Distillation and Differential Privacy in Bandwidth-Constrained Networks

    Gad Gad, Eyad Gad, Zubair Md Fadlullah, Mostafa M. Fouda, Nei Kato

    IEEE Transactions on Vehicular Technology 73 (11) 17586-17601 2024/11

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tvt.2024.3423718  

    ISSN: 0018-9545

    eISSN: 1939-9359

  42. Simultaneous Multiple Connections and Increased Frequency Efficiency Using Beam Squint Approach for IRS-Based Communication

    Yuichi Kawamoto, Ei Tanaka, Shikhar Verma, Nei Kato, Masashi Iwabuchi, Riku Ohmiya, Yoghitha Ramamoorthi, Tomoki Murakami

    IEEE Transactions on Vehicular Technology 73 (11) 17073-17082 2024/11

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tvt.2024.3424856  

    ISSN: 0018-9545

    eISSN: 1939-9359

  43. AIGC-Based Evolvable Digital Twin Networks: A Road to the Intelligent Metaverse

    Xuehan Chen, Linfeng Luo, Fengxiao Tang, Ming Zhao, Nei Kato

    IEEE Network 38 (6) 370-379 2024/11

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/mnet.2024.3411008  

    ISSN: 0890-8044

    eISSN: 1558-156X

  44. Performance Evaluation of Coordination Function Selection in Multi-AP Coordination for Next-Generation Wireless LANs

    Kouki Iizuka, Hiroaki Hashida, Yuichi Kawamoto, Nei Kato, Yoshio Urabe, Hiroyuki Motozuka

    2024 IEEE 100th Vehicular Technology Conference (VTC2024-Fall) 1-5 2024/10/07

    Publisher: IEEE

    DOI: 10.1109/vtc2024-fall63153.2024.10757912  

  45. Multiple Access Point Coordinated Orthogonal Frequency Division Multiple Access Considering Channel Fairness of Non-Coordinated Nodes

    Mitsuni Hinohara, Hiroaki Hashida, Yuichi Kawamoto, Nei Kato, Yoshio Urabe, Hiroyuki Motozuka

    2024 IEEE 100th Vehicular Technology Conference (VTC2024-Fall) 1-5 2024/10/07

    Publisher: IEEE

    DOI: 10.1109/vtc2024-fall63153.2024.10757560  

  46. 3D Codebook Construction Strategy based on Control Accuracy Index for Intelligent Reflecting Surface in Near-field

    Ryuhei Hibi, Hiroaki Hashida, Yuichi Kawamoto, Nei Kato

    2024 IEEE 100th Vehicular Technology Conference (VTC2024-Fall) 1-5 2024/10/07

    Publisher: IEEE

    DOI: 10.1109/vtc2024-fall63153.2024.10757768  

  47. Optimization of HAPS Placement in Hybrid FSO/RF Space-Air-Ground Integrated Networks

    Kazuma Mashiko, Yuichi Kawamoto, Nei Kato, Masayuki Ariyoshi, Kazushi Sugyo, Junichi Funada

    41st International Communications Satellite Systems Conference (ICSSC 2024) 2024/09

    DOI: 10.1049/icp.2024.4603  

  48. On a Cooperative Deep Reinforcement Learning-Based Multi-Objective Routing Strategy for Diversified 6G Metaverse Services

    Bomin Mao, Xueming Zhou, Jiajia Liu, Nei Kato

    IEEE Transactions on Vehicular Technology 73 (9) 14092-14096 2024/09

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tvt.2024.3397707  

    ISSN: 0018-9545

    eISSN: 1939-9359

  49. Near-Field Behaviors of Intelligent Reflecting Surface: Experimental Measurements at 60GHz

    Yuichi Kawamoto, Hiroaki Hashida, Yugo Tanabu, Mitsuni Hinohara, Hiroto Oshima, Nei Kato, Susumu Ano, Kazuto Yano

    2024 IEEE VTS Asia Pacific Wireless Communications Symposium (APWCS) 1-5 2024/08/21

    Publisher: IEEE

    DOI: 10.1109/apwcs61586.2024.10679298  

  50. Smart Handover With Predicted User Behavior Using Convolutional Neural Networks for WiGig Systems

    Tiago Koketsu Rodrigues, Shikhar Verma, Yuichi Kawamoto, Nei Kato, Mostafa M. Fouda, Muhammad Ismail

    IEEE Network 38 (4) 190-196 2024/07

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/mnet.2024.3353301  

    ISSN: 0890-8044

    eISSN: 1558-156X

  51. Stable and Efficient Inter-Satellite Optical Wireless Communications Through Connection of Intersecting Orbits

    Wataru Kato, Yuichi Kawamoto, Nei Kato, Masayuki Ariyoshi, Kazushi Sugyo, Junichi Funada

    2024 IEEE 99th Vehicular Technology Conference (VTC2024-Spring) 1-5 2024/06/24

    Publisher: IEEE

    DOI: 10.1109/vtc2024-spring62846.2024.10683208  

  52. Dividing Control Scheme for Intelligent Reflecting Surfaces Towards the Realization of Multiple Simultaneous Connections

    Taishi Endo, Yuichi Kawamoto, Nei Kato, Masashi Iwabuchi, Tomoki Murakami, Yoghitha Ramamoorthi

    2024 IEEE International Conference on Communications Workshops (ICC Workshops) 147-152 2024/06/09

    Publisher: IEEE

    DOI: 10.1109/iccworkshops59551.2024.10615540  

  53. Frequency Prism in Delay Adjustable Intelligent Reflecting Surfaces for Long Distance Communications in LEO Satellite Networks

    Shuta Sekimori, Yuichi Kawamoto, Nei Kato, Shingo Watanabe, Junichi Funada, Masayuki Ariyoshi

    ICC 2024 - IEEE International Conference on Communications 3470-3475 2024/06/09

    Publisher: IEEE

    DOI: 10.1109/icc51166.2024.10622611  

  54. Spectral Efficiency Analysis of IRS Beam Sweeping with Dedicated Frequency Bands

    Kouta Iwamoto, Yuichi Kawamoto, Nei Kato

    ICC 2024 - IEEE International Conference on Communications 3183-3188 2024/06/09

    Publisher: IEEE

    DOI: 10.1109/icc51166.2024.10622525  

  55. Standalone Intelligent Reflecting Surface With Automatic Update of Phase-Shift Switching Schedule for Improved Communication and Localization

    Takahiro Ohyama, Yuichi Kawamoto, Nei Kato

    IEEE Transactions on Vehicular Technology 73 (6) 8503-8513 2024/06

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tvt.2024.3360949  

    ISSN: 0018-9545

    eISSN: 1939-9359

  56. Joint Rate and Coverage Optimization for the THz/RF Multi-Band Communications of Space-Air-Ground Integrated Network in 6G

    Xun Yuan, Fengxiao Tang, Ming Zhao, Nei Kato

    IEEE Transactions on Wireless Communications 23 (6) 6669-6682 2024/06

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/twc.2023.3336016  

    ISSN: 1536-1276

    eISSN: 1558-2248

  57. On an Intelligent Hierarchical Routing Strategy for Ultra-Dense Free Space Optical Low Earth Orbit Satellite Networks

    Bomin Mao, Xueming Zhou, Jiajia Liu, Nei Kato

    IEEE Journal on Selected Areas in Communications 42 (5) 1219-1230 2024/05

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/jsac.2024.3365880  

    ISSN: 0733-8716

    eISSN: 1558-0008

  58. Construction of Ad-Hoc Public Safety Communications Networks Using EVs as Base Stations in Disaster Scenarios

    Yuichi Kawamoto, Atsuki Nakashima, Nei Kato

    IEEE Transactions on Vehicular Technology 73 (5) 7114-7123 2024/05

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tvt.2023.3341633  

    ISSN: 0018-9545

    eISSN: 1939-9359

  59. Bandwidth Usage Reduction by Traffic Prediction Using Transfer Learning in Satellite Communication Systems

    Kazumasa Tamada, Yuichi Kawamoto, Nei Kato

    IEEE Transactions on Vehicular Technology 73 (5) 7459-7463 2024/05

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tvt.2023.3341442  

    ISSN: 0018-9545

    eISSN: 1939-9359

  60. Traffic-Prediction-Based Dynamic Resource Control Strategy in HAPS-Mounted MEC-Assisted Satellite Communication Systems

    Yuichi Kawamoto, Masaki Takahashi, Shikhar Verma, Nei Kato, Hiroyuki Tsuji, Amane Miura

    IEEE Internet of Things Journal 11 (8) 13824-13836 2024/04/15

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/jiot.2023.3338741  

    eISSN: 2327-4662 2372-2541

  61. A Spatiotemporal Backdoor Attack Against Behavior-Oriented Decision Makers in Metaverse: From Perspective of Autonomous Driving

    Yinbo Yu, Jiajia Liu, Hongzhi Guo, Bomin Mao, Nei Kato

    IEEE Journal on Selected Areas in Communications 42 (4) 948-962 2024/04

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/jsac.2023.3345379  

    ISSN: 0733-8716

    eISSN: 1558-0008

  62. On an Intelligent Task Offloading Model to Jointly Optimize Latency and Energy for Electric Connected Vehicles

    Bomin Mao, Jian Qiu, Nei Kato

    IEEE Transactions on Vehicular Technology 73 (4) 6024-6028 2024/04

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tvt.2023.3333241  

    ISSN: 0018-9545

    eISSN: 1939-9359

  63. IRS-Aided High-Accuracy Positioning for Autonomous Driving Toward 6G: A Tutorial

    Yishi Zhu, Bomin Mao, Nei Kato

    IEEE Vehicular Technology Magazine 19 (1) 85-92 2024/03

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/mvt.2023.3320405  

    ISSN: 1556-6072

    eISSN: 1556-6080

  64. Machine Learning-Based Infrastructure Sharing and Shared Operations for Intelligent Reflecting Surface-Aided Communications

    Hiroaki Hashida, Yuichi Kawamoto, Nei Kato

    IEEE Transactions on Cognitive Communications and Networking 10 (1) 198-208 2024/02

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tccn.2023.3312386  

    eISSN: 2332-7731 2372-2045

  65. Five Disruptive Technologies in 6G to Support Digital Twin Networks

    Qi Guo, Fengxiao Tang, Tiago Koketsu Rodrigues, Nei Kato

    IEEE Wireless Communications 31 (1) 149-155 2024/02

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/mwc.013.2200296  

    ISSN: 1536-1284

    eISSN: 1558-0687

  66. Frequency Resource Allocation for IRS-Aided Communication Using Beam Squint Approach

    Ei Tanaka, Yuichi Kawamoto, Nei Kato, Masashi Iwabuchi, Riku Ohmiya, Tomoki Murakami

    2024 IEEE 21st Consumer Communications & Networking Conference (CCNC) 1064-1065 2024/01/06

    Publisher: IEEE

    DOI: 10.1109/ccnc51664.2024.10454876  

  67. Utilizing Large Language Models for Advanced Optimization and Intelligent Management in Space-Air-Ground Integrated Networks

    Jie Tang, Fengxiao Tang, Sifan Long, Ming Zhao, Nei Kato

    IEEE Network 1-1 2024

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/mnet.2024.3519664  

    ISSN: 0890-8044

    eISSN: 1558-156X

  68. Quantum Computing in Wireless Communications and Networking: A Tutorial-Cum-Survey

    Wei Zhao, Tangjie Weng, Yue Ruan, Zhi Liu, Xuangou Wu, Xiao Zheng, Nei Kato

    IEEE Communications Surveys & Tutorials 1-1 2024

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/comst.2024.3502762  

    eISSN: 1553-877X 2373-745X

  69. Privacy-Preserving Data-Driven Learning Models for Emerging Communication Networks: A Comprehensive Survey

    Mostafa M. Fouda, Zubair Md Fadlullah, Mohamed I. Ibrahem, Nei Kato

    IEEE Communications Surveys & Tutorials 1-1 2024

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/comst.2024.3486690  

    eISSN: 1553-877X 2373-745X

  70. A Survey on Multi-AP Coordination Approaches Over Emerging WLANs: Future Directions and Open Challenges

    Shikhar Verma, Tiago Koketsu Rodrigues, Yuichi Kawamoto, Mostafa M. Fouda, Nei Kato

    IEEE Communications Surveys & Tutorials 26 (2) 858-889 2024

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/comst.2023.3344167  

    eISSN: 1553-877X 2373-745X

  71. Frequency Selective Surface Toward 6G Communication Systems: A Contemporary Survey

    Xuehan Chen, Jingjing Tan, Litian Kang, Fengxiao Tang, Ming Zhao, Nei Kato

    IEEE Communications Surveys & Tutorials 26 (3) 1635-1675 2024

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/comst.2024.3369250  

    eISSN: 1553-877X 2373-745X

  72. On a Novel High Accuracy Positioning With Intelligent Reflecting Surface and Unscented Kalman Filter for Intelligent Transportation Systems in B5G

    Yishi Zhu, Bomin Mao, Nei Kato

    IEEE Journal on Selected Areas in Communications 42 (1) 68-77 2024/01

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/jsac.2023.3322805  

    ISSN: 0733-8716

    eISSN: 1558-0008

  73. Digital Twin Satellite Networks Toward 6G: Motivations, Challenges, and Future Perspectives

    Bomin Mao, Xueming Zhou, Jiajia Liu, Nei Kato

    IEEE Network 38 (1) 54-60 2024/01

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/mnet.2023.3332895  

    ISSN: 0890-8044

    eISSN: 1558-156X

  74. Hybrid Routing in FSO/RF Space-Air-Ground Integrated Network

    Qi Guo, Fengxiao Tang, Nei Kato

    GLOBECOM 2023 - 2023 IEEE Global Communications Conference 6585-6590 2023/12/04

    Publisher: IEEE

    DOI: 10.1109/globecom54140.2023.10437711  

  75. Sharing Intelligent Reflecting Surface Among Multiple Wireless Communication Systems

    Hiroaki Hashida, Yuichi Kawamoto, Nei Kato

    GLOBECOM 2023 - 2023 IEEE Global Communications Conference 2023/12/04

    Publisher: IEEE

    DOI: 10.1109/globecom54140.2023.10437582  

  76. HAPS-Based Interference Suppression Through Null Broadening With Directivity Control in Space-Air-Ground Integrated Networks

    Yuichi Kawamoto, Akinori Matsushita, Shikhar Verma, Nei Kato, Kazuma Kaneko, Ayaka Sata, Masatake Hangai

    IEEE Transactions on Vehicular Technology 72 (12) 16098-16107 2023/12

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tvt.2023.3295385  

    ISSN: 0018-9545

    eISSN: 1939-9359

  77. AI-Assisted Edge Caching for Metaverse of Connected and Automated Vehicles: Proposal, Challenges, and Future Perspectives

    Bomin Mao, Yangbo Liu, Jiajia Liu, Nei Kato

    IEEE Vehicular Technology Magazine 18 (4) 66-74 2023/12

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/mvt.2023.3327514  

    ISSN: 1556-6072

    eISSN: 1556-6080

  78. Design and Optimization of RSMA for Coexisting HTC/MTC in 6G and Future Networks

    Shangwei Zhang, Jiajia Liu, Zhenjiang Shi, Jiadai Wang, Nei Kato

    IEEE Transactions on Wireless Communications 22 (12) 9533-9548 2023/12

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/twc.2023.3271673  

    ISSN: 1536-1276

    eISSN: 1558-2248

  79. A Novel Routing Control Method Using Federated Learning in Large-Scale Wireless Mesh Networks

    Yoshihiko Watanabe, Yuichi Kawamoto, Nei Kato

    IEEE Transactions on Wireless Communications 22 (12) 9291-9300 2023/12

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/twc.2023.3269785  

    ISSN: 1536-1276

    eISSN: 1558-2248

  80. Energy Efficient Routing for Fso-Rf Space-Air-Ground Integrated Network: A Deep Reinforcement Learning Approach

    Qi Guo, Nei Kato, Fengxiao Tang

    2023 8th IEEE International Conference on Network Intelligence and Digital Content (IC-NIDC) 2023/11/03

    Publisher: IEEE

    DOI: 10.1109/ic-nidc59918.2023.10390856  

  81. Resource Allocation for Aerial Assisted Digital Twin Edge Mobile Network

    Qi Guo, Fengxiao Tang, Nei Kato

    IEEE Journal on Selected Areas in Communications 41 (10) 3070-3079 2023/10

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/jsac.2023.3310065  

    ISSN: 0733-8716

    eISSN: 1558-0008

  82. Resource Allocation Optimization by Quantum Computing for Shared Use of Standalone IRS

    Takahiro Ohyama, Yuichi Kawamoto, Nei Kato

    IEEE Transactions on Emerging Topics in Computing 11 (4) 950-961 2023/10

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tetc.2023.3292355  

    eISSN: 2168-6750 2376-4562

  83. Standalone-Intelligent Reflecting Surface Control Method Using Hierarchical Exploration by Beamwidth Expansion and Environment-Adaptive Codebook

    Ryuhei Hibi, Yuichi Kawamoto, Nei Kato

    IEEE Transactions on Vehicular Technology 72 (9) 11990-12000 2023/09

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tvt.2023.3266831  

    ISSN: 0018-9545

    eISSN: 1939-9359

  84. Federated Reinforcement Learning-Based Resource Allocation in D2D-Enabled 6G

    Qi Guo, Fengxiao Tang, Nei Kato

    IEEE Network 37 (5) 89-95 2023/09

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/mnet.122.2200102  

    ISSN: 0890-8044

    eISSN: 1558-156X

  85. Intelligent Configuration Method Based on UAV-Driven Frequency Selective Surface for Communication Band Shielding

    Jingjing Tan, Xunhua Dai, Fengxiao Tang, Ming Zhao, Nei Kato

    IEEE Internet of Things Journal 10 (13) 11507-11517 2023/07/01

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/jiot.2023.3243387  

    eISSN: 2327-4662 2372-2541

  86. IRS Backscatter Enhancing Against Jamming and Eavesdropping Attacks

    Yurui Cao, Sai Xu, Jiajia Liu, Nei Kato

    IEEE Internet of Things Journal 10 (12) 10740-10751 2023/06/15

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/jiot.2023.3241839  

    eISSN: 2327-4662 2372-2541

  87. Exploiting Reflection Direction Variation for Phase Control in Multiple Simultaneous IRS Links

    Ei Tanaka, Yuichi Kawamoto, Nei Kato, Masashi Iwabuchi, Riku Ohmiya, Tomoki Murakami

    2023 IEEE 97th Vehicular Technology Conference (VTC2023-Spring) 2023/06

    Publisher: IEEE

    DOI: 10.1109/vtc2023-spring57618.2023.10199656  

  88. Latency Reduction with Different NR Sidelink Modes in V2X Networks with UAV Support

    Rin Yamazaki, Yuichi Kawamoto, Nei Kato

    ICC 2023 - IEEE International Conference on Communications 2023/05/28

    Publisher: IEEE

    DOI: 10.1109/icc45041.2023.10279039  

  89. Federated Reinforcement Learning-Based Resource Allocation for D2D-Aided Digital Twin Edge Networks in 6G Industrial IoT

    Qi Guo, Fengxiao Tang, Nei Kato

    IEEE Transactions on Industrial Informatics 19 (5) 7228-7236 2023/05

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tii.2022.3227655  

    ISSN: 1551-3203

    eISSN: 1941-0050

  90. Hybrid Centralized and Distributed Learning for MEC-Equipped Satellite 6G Networks

    Tiago Koketsu Rodrigues, Nei Kato

    IEEE Journal on Selected Areas in Communications 41 (4) 1201-1211 2023/04

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/jsac.2023.3242700  

    ISSN: 0733-8716

    eISSN: 1558-0008

  91. Artificial Intelligence-Assisted Network Slicing: Network Assurance and Service Provisioning in 6G

    Jiadai Wang, Jiajia Liu, Jingyi Li, Nei Kato

    IEEE Vehicular Technology Magazine 18 (1) 49-58 2023/03

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/mvt.2022.3228399  

    ISSN: 1556-6072

    eISSN: 1556-6080

  92. Robust Deep Learning-based Indoor mmWave Channel Prediction under Concept Drift

    Eslam Hasan, Elmahedi Mahalal, Muhammad Ismail, Zi Yang Wu, Mostafa M. Fouda, Tiago Koketsu Rodrigues, Nei Kato

    IEEE Vehicular Technology Conference 2023

    DOI: 10.1109/VTC2023-Fall60731.2023.10333513  

    ISSN: 1550-2252

  93. Impact of UAV Failure and Severe Weather Conditions in mmWave and Terahertz Signals for AeriaL Edge Computing

    Reham Wafaee Ibrahim, Tiago Koketsu Rodrigues, Nei Kato

    IEEE Vehicular Technology Conference 2023

    DOI: 10.1109/VTC2023-Fall60731.2023.10333847  

    ISSN: 1550-2252

  94. Security and Privacy on 6G Network Edge: A Survey

    Bomin Mao, Jiajia Liu, Yingying Wu, Nei Kato

    IEEE Communications Surveys & Tutorials 25 (2) 1095-1127 2023

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/comst.2023.3244674  

    eISSN: 1553-877X 2373-745X

  95. Quantum Computing Based Optimization for Intelligent Reflecting Surface (IRS)-Aided Cell-Free Network

    Takahiro Ohyama, Yuichi Kawamoto, Nei Kato

    IEEE Transactions on Emerging Topics in Computing 11 (1) 18-29 2023/01/01

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tetc.2022.3161542  

    eISSN: 2168-6750 2376-4562

  96. Blockchain-Based Trusted Traffic Offloading in Space-Air-Ground Integrated Networks (SAGIN): A Federated Reinforcement Learning Approach

    Fengxiao Tang, Cong Wen, Linfeng Luo, Ming Zhao, Nei Kato

    IEEE Journal on Selected Areas in Communications 40 (12) 3501-3516 2022/12

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/jsac.2022.3213317  

    ISSN: 0733-8716

    eISSN: 1558-0008

  97. Selective Reflection Control: Distributed IRS-Aided Communication With Partial Channel State Information

    Hiroaki Hashida, Yuichi Kawamoto, Nei Kato

    IEEE Transactions on Vehicular Technology 71 (11) 11949-11958 2022/11

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tvt.2022.3194352  

    ISSN: 0018-9545

    eISSN: 1939-9359

  98. A Dynamic Task Scheduling Strategy for Multi-Access Edge Computing in IRS-Aided Vehicular Networks

    Yishi Zhu, Bomin Mao, Nei Kato

    IEEE Transactions on Emerging Topics in Computing 10 (4) 1761-1771 2022/10/01

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tetc.2022.3153494  

    eISSN: 2168-6750 2376-4562

  99. Optimal Beamformer Design for Millimeter Wave Dual-Functional Radar-Communication Based V2X Systems

    Beiyuan Liu, Jiajia Liu, Nei Kato

    IEEE Journal on Selected Areas in Communications 40 (10) 2980-2993 2022/10

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/jsac.2022.3196089  

    ISSN: 0733-8716

    eISSN: 1558-0008

  100. UAV-Aided Information Diffusion for Vehicle-to-Vehicle (V2V) in Disaster Scenarios Peer-reviewed

    Yuichi Kawamoto, Takuto Mitsuhashi, Nei Kato

    IEEE Transactions on Emerging Topics in Computing 10 (4) 1909-1917 2022/10/01

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tetc.2021.3120551  

    eISSN: 2168-6750 2376-4562

  101. Machine Learning for Space–Air–Ground Integrated Network Assisted Vehicular Network: A Novel Network Architecture for Vehicles

    Fengxiao Tang, Cong Wen, Ming Zhao, Nei Kato

    IEEE Vehicular Technology Magazine 17 (3) 34-44 2022/09

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/mvt.2022.3188405  

    ISSN: 1556-6072

    eISSN: 1556-6080

  102. A Smart Internet-Wide Port Scan Approach for Improving IoT Security Under Dynamic WLAN Environments

    Shikhar Verma, Yuichi Kawamoto, Nei Kato

    IEEE Internet of Things Journal 9 (14) 11951-11961 2022/07/15

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/jiot.2021.3132389  

    eISSN: 2327-4662 2372-2541

  103. Adaptive Pilot Interval Optimization for Intelligent Reflecting Surface-Aided Communication Systems

    Hiroaki Hashida, Yuichi Kawamoto, Nei Kato

    IEEE Transactions on Vehicular Technology 71 (7) 7963-7966 2022/07

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tvt.2022.3166639  

    ISSN: 0018-9545

    eISSN: 1939-9359

  104. Deep Learning-Based Privacy Preservation and Data Analytics for IoT Enabled Healthcare

    Hongliang Bi, Jiajia Liu, Nei Kato

    IEEE Transactions on Industrial Informatics 18 (7) 4798-4807 2022/07

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tii.2021.3117285  

    ISSN: 1551-3203

    eISSN: 1941-0050

  105. Intelligent Reflecting Surface (IRS) Allocation Scheduling Method Using Combinatorial Optimization by Quantum Computing Peer-reviewed

    Takahiro Ohyama, Yuichi Kawamoto, Nei Kato

    IEEE Transactions on Emerging Topics in Computing 10 (3) 1633-1644 2022/07/01

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tetc.2021.3115107  

    eISSN: 2168-6750 2376-4562

  106. Offloading Decision for Mobile Multi-Access Edge Computing in a Multi-Tiered 6G Network Peer-reviewed

    Tiago Koketsu Rodrigues, Jiajia Liu, Nei Kato

    IEEE Transactions on Emerging Topics in Computing 10 (3) 1414-1427 2022/07/01

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tetc.2021.3090061  

    eISSN: 2168-6750 2376-4562

  107. Improvement of Battery Lifetime Based on Communication Resource Control in Low-Earth-Orbit Satellite Constellations Peer-reviewed

    Hikaru Tsuchida, Yuichi Kawamoto, Nei Kato, Kazuma Kaneko, Shigenori Tani, Masatake Hangai, Hiroshi Aruga

    IEEE Transactions on Emerging Topics in Computing 10 (3) 1388-1398 2022/07/01

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tetc.2021.3087489  

    eISSN: 2168-6750 2376-4562

  108. Mobility-Aware User Association Strategy for IRS-Aided mm-Wave Multibeam Transmission Towards 6G

    Hiroaki Hashida, Yuichi Kawamoto, Nei Kato, Masashi Iwabuchi, Tomoki Murakami

    IEEE Journal on Selected Areas in Communications 40 (5) 1667-1678 2022/05

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/jsac.2022.3143216  

    ISSN: 0733-8716

    eISSN: 1558-0008

  109. Multi-Agent Deep Reinforcement Learning for Massive Access in 5G and Beyond Ultra-Dense NOMA System

    Zhenjiang Shi, Jiajia Liu, Shangwei Zhang, Nei Kato

    IEEE Transactions on Wireless Communications 21 (5) 3057-3070 2022/05

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/twc.2021.3117859  

    ISSN: 1536-1276

    eISSN: 1558-2248

  110. Toward Smart and Secure V2X Communication in 5G and Beyond: A UAV-Enabled Aerial Intelligent Reflecting Surface Solution

    Yurui Cao, Sai Xu, Jiajia Liu, Nei Kato

    IEEE Vehicular Technology Magazine 17 (1) 66-73 2022/03

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/mvt.2021.3136832  

    ISSN: 1556-6072

    eISSN: 1556-6080

  111. Network Slicing with Centralized and Distributed Reinforcement Learning for Combined Satellite/Ground Networks in a 6G Environment

    Tiago Koketsu Rodrigues, Nei Kato

    IEEE Wireless Communications 29 (1) 104-110 2022/02/01

    DOI: 10.1109/MWC.001.2100287  

    ISSN: 1536-1284

    eISSN: 1558-0687

  112. IRS-aided Communications Without Channel State Information Relying on Deep Reinforcement Learning.

    Hiroaki Hashida, Yuichi Kawamoto, Nei Kato, Masashi Iwabuchi, Tomoki Murakami

    IEEE Global Communications Conference(GLOBECOM) 1211-1216 2022

    Publisher: IEEE

    DOI: 10.1109/GLOBECOM48099.2022.10001413  

  113. Survey on Digital Twin Edge Networks (DITEN) Toward 6G

    Fengxiao Tang, Xuehan Chen, Tiago Koketsu Rodrigues, Ming Zhao, Nei Kato

    IEEE Open Journal of the Communications Society 3 1360-1381 2022

    DOI: 10.1109/OJCOMS.2022.3197811  

    eISSN: 2644-125X

  114. Deep Q Networks with Centralized Learning over LEO Satellite Networks in a 6G Cloud Environment

    Tiago Koketsu Rodrigues, Nei Kato

    2022 IEEE Global Communications Conference, GLOBECOM 2022 - Proceedings 5905-5910 2022

    DOI: 10.1109/GLOBECOM48099.2022.10000709  

  115. The Roadmap of Communication and Networking in 6G for the Metaverse

    Fengxiao Tang, Xuehan Chen, Ming Zhao, Nei Kato

    IEEE Wireless Communications 1-15 2022

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/mwc.019.2100721  

    ISSN: 1536-1284

    eISSN: 1558-0687

  116. Intelligent Reflecting Surface Backscatter Enabled Multi-Tier Computing for 6G Internet of Things

    Sai Xu, Jiajia Liu, Nei Kato, Yanan Du

    IEEE Journal on Selected Areas in Communications 1-1 2022

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/jsac.2022.3231861  

    ISSN: 0733-8716

    eISSN: 1558-0008

  117. Federated Learning for Intelligent Transmission with Space-air-ground Integrated Network (SAGIN) toward 6G

    Fengxiao Tang, Cong Wen, Xuehan Chen, Nei Kato

    IEEE Network 1-7 2022

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/mnet.104.2100615  

    ISSN: 0890-8044

    eISSN: 1558-156X

  118. Balancing QoS and Security in the Edge: Existing Practices, Challenges, and 6G Opportunities With Machine Learning

    Zubair Md Fadlullah, Bomin Mao, Nei Kato

    IEEE Communications Surveys & Tutorials 24 (4) 2419-2448 2022

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/comst.2022.3191697  

    eISSN: 1553-877X 2373-745X

  119. Intelligent Reflecting Surface in 6G Vehicular Communications: A Survey Invited

    Yishi Zhu, Bomin Mao, Nei Kato

    IEEE Open Journal of Vehicular Technology 3 266-277 2022

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/ojvt.2022.3177253  

    eISSN: 2644-1330

  120. Blockchain-Assisted Distributed and Lightweight Authentication Service for Industrial Unmanned Aerial Vehicles

    Yawen Tan, Jiadai Wang, Jiajia Liu, Nei Kato

    IEEE Internet of Things Journal 1-1 2022

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/jiot.2022.3142251  

    eISSN: 2327-4662 2372-2541

  121. DBF-Based Fusion Control of Transmit Power and Beam Directivity for Flexible Resource Allocation in HTS Communication System Toward B5G

    Masaki Takahashi, Yuichi Kawamoto, Nei Kato, Amane Miura, Morio Toyoshima

    IEEE Transactions on Wireless Communications 21 (1) 95-105 2022/01

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/twc.2021.3093878  

    ISSN: 1536-1276

    eISSN: 1558-2248

  122. A Deep Reinforcement Learning-Based Dynamic Traffic Offloading in Space-Air-Ground Integrated Networks (SAGIN) Peer-reviewed

    Fengxiao Tang, Hans Hofner, Nei Kato, Kazuma Kaneko, Yasutaka Yamashita, Masatake Hangai

    IEEE Journal on Selected Areas in Communications 40 (1) 276-289 2022/01

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/jsac.2021.3126073  

    ISSN: 0733-8716

    eISSN: 1558-0008

  123. Intelligent Reflecting Surface-Aided Vehicular Networks Toward 6G: Vision, Proposal, and Future Directions Peer-reviewed

    Yishi Zhu, Bomin Mao, Yuichi Kawamoto, Nei Kato

    IEEE Vehicular Technology Magazine 16 (4) 48-56 2021/12

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/mvt.2021.3113890  

    ISSN: 1556-6072

    eISSN: 1556-6080

  124. Application of Cybertwin for Offloading in Mobile Multiaccess Edge Computing for 6G Networks Peer-reviewed

    Tiago Koketsu Rodrigues, Jiajia Liu, Nei Kato

    IEEE Internet of Things Journal 8 (22) 16231-16242 2021/11/15

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/jiot.2021.3095308  

    eISSN: 2327-4662 2372-2541

  125. Envisioning Intelligent Reflecting Surface Empowered Space-Air-Ground Integrated Network

    Sai Xu, Jiajia Liu, Tiago Koketsu Rodrigues, Nei Kato

    IEEE Network 35 (6) 225-232 2021/11

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/mnet.011.2100007  

    ISSN: 0890-8044

    eISSN: 1558-156X

  126. A Survey on Space-Air-Ground-Sea Integrated Network Security in 6G Peer-reviewed

    Hongzhi Guo, Jingyi Li, Jiajia Liu, Na Tian, Nei Kato

    IEEE Communications Surveys & Tutorials 1-1 2021/11

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/comst.2021.3131332  

    eISSN: 1553-877X 2373-745X

  127. A Practical Approach for SNR-based Subchannel Allocation Considering Inter-Beam Interference in a Satellite Communication System Peer-reviewed

    Masaki Takahashi, Simpei Suzuki, Yuichi Kawamoto, Nei Kato

    2021 7th International Conference on Network Intelligence and Digital Content (IC-NIDC 2021) 2021/11

  128. AI Models for Green Communications Towards 6G Peer-reviewed

    Bomin Mao, Fengxiao Tang, Yuichi Kawamoto, Nei Kato

    IEEE Communications Surveys & Tutorials 1-1 2021/11

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/comst.2021.3130901  

    eISSN: 1553-877X 2373-745X

  129. Deep Learning-based Privacy Preservation and Data Analytics for IoT Enabled Healthcare Peer-reviewed

    Hongliang Bi, Jiajia Liu, Nei Kato

    IEEE Transactions on Industrial Informatics 18 (7) 1-1 2021/10/08

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tii.2021.3117285  

    ISSN: 1551-3203

    eISSN: 1941-0050

  130. Deep Learning Techniques for Advancing 6G Communications in the Physical Layer Peer-reviewed

    Shangwei Zhang, Jiajia Liu, Tiago Koketsu Rodrigues, Nei Kato

    IEEE Wireless Communications 28 (5) 141-147 2021/10

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/mwc.001.2000516  

    ISSN: 1536-1284

    eISSN: 1558-0687

  131. Edge Cloud Server Deployment With Transmission Power Control Through Machine Learning for 6G Internet of Things Peer-reviewed

    Tiago Koketsu Rodrigues, Katsuya Suto, Nei Kato

    IEEE Transactions on Emerging Topics in Computing 9 (4) 2099-2108 2021/10/01

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tetc.2019.2963091  

    eISSN: 2168-6750 2376-4562

  132. On Smart IoT Remote Sensing over Integrated Terrestrial-Aerial-Space Networks: An Asynchronous Federated Learning Approach

    Zubair Md Fadlullah, Nei Kato

    IEEE Network 35 (5) 129-135 2021/09

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/mnet.101.2100125  

    ISSN: 0890-8044

    eISSN: 1558-156X

  133. Robust Multi-User Beamforming for IRS-Enhanced Near-Space Downlink Communications Coexisting With Satellite System Peer-reviewed

    Sai Xu, Jiajia Liu, Tiago Koketsu Rodrigues, Nei Kato

    IEEE Internet of Things Journal 1-1 2021/09

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/jiot.2021.3112595  

    eISSN: 2327-4662 2372-2541

  134. Proposal and Performance Evaluation of Information Diffusion Technique with Novel Virtual-Cell-Based Wi-Fi Direct Peer-reviewed

    Tohn Furutani, Yuichi Kawamoto, Hiroki Nishiyama, Nei Kato

    IEEE Transactions on Emerging Topics in Computing 9 (3) 1519-1528 2021/09

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tetc.2019.2891713  

    eISSN: 2376-4562

  135. Novel Computation and Communication Resources Allocation Using Relay Communications in UAV-mounted Cloudlet Systems Peer-reviewed

    Hayato Shimada, Yuichi Kawamoto, Nei Kato

    IEEE Transactions on Network Science and Engineering 1-1 2021/08

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tnse.2021.3105455  

    eISSN: 2327-4697 2334-329X

  136. Optimizing Computation Offloading in Satellite-UAV-Served 6G IoT: A Deep Learning Approach Peer-reviewed

    Bomin Mao, Fengxiao Tang, Yuichi Kawamoto, Nei Kato

    IEEE Network 35 (4) 102-108 2021/07

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/mnet.011.2100097  

    ISSN: 0890-8044

    eISSN: 1558-156X

  137. Distributed Q-Learning Aided Uplink Grant-Free NOMA for Massive Machine-Type Communications Peer-reviewed

    Jiajia Liu, Zhenjiang Shi, Shangwei Zhang, Nei Kato

    IEEE Journal on Selected Areas in Communications 1-1 2021/07

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/jsac.2021.3078496  

    ISSN: 0733-8716

    eISSN: 1558-0008

  138. An Intelligent Route Computation Approach Based on Real-Time Deep Learning Strategy for Software Defined Communication Systems Peer-reviewed

    Bomin Mao, Fengxiao Tang, Zubair Md. Fadlullah, Nei Kato

    IEEE Transactions on Emerging Topics in Computing 9 (3) 1554-1565 2021/07

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tetc.2019.2899407  

    eISSN: 2376-4562

  139. Smart Resource Allocation for Mobile Edge Computing: A Deep Reinforcement Learning Approach Peer-reviewed

    Jiadai Wang, Lei Zhao, Jiajia Liu, Nei Kato

    IEEE Transactions on Emerging Topics in Computing 9 (3) 1529-1541 2021/07

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tetc.2019.2902661  

    eISSN: 2376-4562

  140. Blockchain-based Trust Management for Internet of Vehicles Peer-reviewed

    Haibin Zhang, Jiajia Liu, Huanlei Zhao, Peng Wang, Nei Kato

    IEEE Transactions on Emerging Topics in Computing 9 (3) 1397-1409 2021/07

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tetc.2020.3033532  

    eISSN: 2376-4562

  141. Comprehensive Survey on Machine Learning in Vehicular Network: Technology, Applications and Challenges Peer-reviewed

    Fengxiao Tang, Bomin Mao, Nei Kato, Guan Gui

    IEEE Communications Surveys & Tutorials 23 (3) 2027-2057 2021/06/23

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/comst.2021.3089688  

    eISSN: 2373-745X

  142. Survey on Machine Learning for Intelligent End-to-End Communication towards 6G: From Network Access, Routing to Traffic Control and Streaming Adaption Peer-reviewed

    Fengxiao Tang, Bomin Mao, Yuichi Kawamoto, Nei Kato

    IEEE Communications Surveys & Tutorials 23 (3) 1578-1598 2021

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/comst.2021.3073009  

    eISSN: 2373-745X

  143. Movement Aware CoMP Handover in Heterogeneous Ultra-Dense Networks Peer-reviewed

    Wen Sun, Lu Wang, Jiajia Liu, Nei Kato, Yanning Zhang

    IEEE Transactions on Communications 69 (1) 340-352 2021/01

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tcomm.2020.3019388  

    ISSN: 0090-6778

    eISSN: 1558-0857

  144. Blockchain-Based Key Management for Heterogeneous Flying Ad-Hoc Network Peer-reviewed

    Yawen Tan, Jiajia Liu, Nei Kato

    IEEE Transactions on Industrial Informatics 1-1 2021

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tii.2020.3048398  

    ISSN: 1551-3203

    eISSN: 1941-0050

  145. Intelligent Reflecting Surface Placement Optimization in Air-Ground Communication Networks Toward 6G Peer-reviewed

    Hiroaki Hashida, Yuichi Kawamoto, Nei Kato

    IEEE Wireless Communications 27 (6) 146-151 2020/12

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/mwc.001.2000142  

    ISSN: 1536-1284

    eISSN: 1558-0687

  146. Deep Reinforcement Learning for Dynamic Uplink/Downlink Resource Allocation in High Mobility 5G HetNet Peer-reviewed

    Fengxiao Tang, Yibo Zhou, Nei Kato

    IEEE Journal on Selected Areas in Communications 38 (12) 2773-2782 2020/12

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/jsac.2020.3005495  

    ISSN: 0733-8716

    eISSN: 1558-0008

  147. Distributed Q-Learning-Assisted Grant-Free NORA for Massive Machine-Type Communications Peer-reviewed

    Zhenjiang Shi, Wei Gao, Jiajia Liu, Nei Kato, Yanning Zhang

    GLOBECOM 2020 - 2020 IEEE Global Communications Conference 2020/12

    Publisher: IEEE

    DOI: 10.1109/globecom42002.2020.9322273  

  148. An Initial Study on Designing Prediction-Based Resource Allocation in Satellite Communication Systems Peer-reviewed

    Masaki Takahashi, Yuichi Kawamoto, Nei Kato

    IEEE International Conference on Communications (ICC 2020), Virtual Conference 2020/12

  149. A Novel IoT-Aware WLAN Environment Identification for Efficient Internet-Wide Port Scan Peer-reviewed

    Shikhar Verma, Yuichi Kawamoto, Nei Kato

    GLOBECOM 2020 - 2020 IEEE Global Communications Conference 2020-January 2020/12

    Publisher: IEEE

    DOI: 10.1109/globecom42002.2020.9348199  

  150. Prediction of Network Traffic Load on High Variability Data Based on Distance Correlation Peer-reviewed

    Lo Pang-Yun Ting, Tiago Koketsu Rodrigues, Nei Kato, Kun-Ta Chuang

    2020 IEEE 92nd Vehicular Technology Conference (VTC2020-Fall) 2020/11

    DOI: 10.1109/vtc2020-fall49728.2020.9348769  

  151. Security Analysis of Network-Oblivious Internet-Wide Scan for IEEE 802.11ah Enabled IoT Peer-reviewed

    Shikhar Verma, Yuichi Kawamoto, Nei Kato

    2020 IEEE 92nd Vehicular Technology Conference (VTC2020-Fall) 2020-November 2020/11

    Publisher: IEEE

    DOI: 10.1109/vtc2020-fall49728.2020.9348601  

    ISSN: 1550-2252

  152. 6G: Opening New Horizons for Integration of Comfort, Security, and Intelligence Peer-reviewed

    Guan Gui, Miao Liu, Fengxiao Tang, Nei Kato, Fumiyuki Adachi

    IEEE Wireless Communications 27 (5) 126-132 2020/10

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/mwc.001.1900516  

    ISSN: 1536-1284

    eISSN: 1558-0687

  153. Adaptive Channel Selection and Transmission Timing Control for Simultaneous Receiving and Sending in Relay-Based UAV Network Peer-reviewed

    Ayaka Hanyu, Yuichi Kawamoto, Nei Kato

    IEEE Transactions on Network Science and Engineering 7 (4) 2840-2849 2020/10/01

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tnse.2020.2997721  

    eISSN: 2334-329X

  154. ST-DeLTA: A Novel Spatial-Temporal Value Network Aided Deep Learning Based Intelligent Network Traffic Control System Peer-reviewed

    Fengxiao Tang, Bomin Mao, Zubair Md. Fadlullah, Jiajia Liu, Nei Kato

    IEEE Transactions on Sustainable Computing 5 (4) 568-580 2020/10/01

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tsusc.2019.2929935  

    eISSN: 2377-3790

  155. Machine Learning-Enabled Cooperative Spectrum Sensing for Non-Orthogonal Multiple Access Peer-reviewed

    Zhenjiang Shi, Wei Gao, Shangwei Zhang, Jiajia Liu, Nei Kato

    IEEE Transactions on Wireless Communications 19 (9) 5692-5702 2020/09

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/twc.2020.2995594  

    ISSN: 1536-1276

    eISSN: 1558-2248

  156. Automatic Content Inspection and Forensics for Children Android Apps Peer-reviewed

    Qian Luo, Jiajia Liu, Jiadai Wang, Yawen Tan, Yurui Cao, Nei Kato

    IEEE Internet of Things Journal 7 (8) 7123-7134 2020/08

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/jiot.2020.2982248  

    eISSN: 2372-2541

  157. AI-Based Joint Optimization of QoS and Security for 6G Energy Harvesting Internet of Things Peer-reviewed

    Bomin Mao, Yuichi Kawamoto, Nei Kato

    IEEE Internet of Things Journal 7 (8) 7032-7042 2020/08

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/jiot.2020.2982417  

    eISSN: 2372-2541

  158. Toward Robust and Intelligent Drone Swarm: Challenges and Future Directions Peer-reviewed

    Wu Chen, Jiajia Liu, Hongzhi Guo, Nei Kato

    IEEE Network 34 (4) 278-283 2020/07

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/mnet.001.1900521  

    ISSN: 0890-8044

    eISSN: 1558-156X

  159. Adaptive Multi-Beam Arrangement for Improving Throughput in an HTS Communication System

    Masaki Takahashi, Yuichi Kawamoto, Nei Kato, Amane Miura, Morio Toyoshima

    IEEE International Conference on Communications 2020- 2020/06/01

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/ICC40277.2020.9148622  

    ISSN: 1550-3607

  160. Efficient Power Control for Satellite-Borne Batteries Using Q-Learning in Low-Earth-Orbit Satellite Constellations Peer-reviewed

    Hikaru Tsuchida, Yuichi Kawamoto, Nei Kato, Kazuma Kaneko, Shigenori Tani, Shigeru Uchida, Hiroshi Aruga

    IEEE Wireless Communications Letters 9 (6) 809-812 2020/06

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/lwc.2020.2970711  

    ISSN: 2162-2337

    eISSN: 2162-2345

  161. Ten Challenges in Advancing Machine Learning Technologies toward 6G Peer-reviewed

    Nei Kato, Bomin Mao, Fengxiao Tang, Yuichi Kawamoto, Jiajia Liu

    IEEE Wireless Communications 27 (3) 96-103 2020/06

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/mwc.001.1900476  

    ISSN: 1536-1284

    eISSN: 1558-0687

  162. Novel Workload Balancing Method for UAV-based Edge Cloud Computing Systems with Handover Peer-reviewed

    Hayato Shimada, Yuichi Kawamoto, Nei Kato

    ICC 2020 - 2020 IEEE International Conference on Communications (ICC) 2020/06

    Publisher: IEEE

    DOI: 10.1109/icc40277.2020.9149072  

  163. Impact of Internet-Wide Scanning on IoT Data Communication in Wireless LANs Peer-reviewed

    Hiroaki Hashida, Yuichi Kawamoto, Nei Kato

    2020 IEEE International Conference on Communications Workshops (ICC Workshops) 2020/06

    Publisher: IEEE

    DOI: 10.1109/iccworkshops49005.2020.9145257  

  164. Envisioning Device-to-Device Communications in 6G Peer-reviewed

    Shangwei Zhang, Jiajia Liu, Hongzhi Guo, Mingping Qi, Nei Kato

    IEEE Network 34 (3) 86-91 2020/05

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/mnet.001.1900652  

    ISSN: 0890-8044

    eISSN: 1558-156X

  165. Flexible Resource Allocation With Inter-Beam Interference in Satellite Communication Systems With a Digital Channelizer Peer-reviewed

    Yuichi Kawamoto, Taiki Kamei, Masaki Takahashi, Nei Kato, Amane Miura, Morio Toyoshima

    IEEE Transactions on Wireless Communications 19 (5) 2934-2945 2020/05

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/twc.2020.2969173  

    ISSN: 1536-1276

    eISSN: 1558-2248

  166. Reinforcement Learning-Based Radio Resource Control in 5G Vehicular Network Peer-reviewed

    Yibo Zhou, Fengxiao Tang, Yuichi Kawamoto, Nei Kato

    IEEE Wireless Communications Letters 9 (5) 611-614 2020/05

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/lwc.2019.2962409  

    ISSN: 2162-2337

    eISSN: 2162-2345

  167. Communication Scheduling with Diversity for Unmanned Aircraft Systems using Local 5G Peer-reviewed

    Takeru Kitagawa, Yuichi Kawamoto, Nei Kato

    Journal of Communications and Information Networks (JCIN) 5 (1) 50-61 2020/04

  168. AI-Enhanced Cooperative Spectrum Sensing for Non-Orthogonal Multiple Access Peer-reviewed

    Zhenjiang Shi, Wei Gao, Shangwei Zhang, Jiajia Liu, Nei Kato

    IEEE Wireless Communications 27 (2) 173-179 2020/04

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/mnet.001.1900305  

    ISSN: 1536-1284

    eISSN: 1558-0687

  169. Probe Delay Based Adaptive Port Scanning for IoT Devices with Private IP Address Behind NAT Peer-reviewed

    Fengxiao Tang, Yuichi Kawamoto, Nei Kato, Kazuto Yano, Yoshinori Suzuki

    IEEE Network 34 (2) 195-201 2020/03

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/mnet.001.1900264  

    ISSN: 0890-8044

    eISSN: 1558-156X

  170. Automobile Driver Fingerprinting: A New Machine Learning Based Authentication Scheme Peer-reviewed

    Yijie Xun, Jiajia Liu, Nei Kato, Yongqiang Fang, Yanning Zhang

    IEEE Transactions on Industrial Informatics 16 (2) 1417-1426 2020/02

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tii.2019.2946626  

    ISSN: 1551-3203

    eISSN: 1941-0050

  171. Future Intelligent and Secure Vehicular Network Toward 6G: Machine-Learning Approaches Peer-reviewed

    Fengxiao Tang, Yuichi Kawamoto, Nei Kato, Jiajia Liu

    Proceedings of the IEEE 108 (2) 292-307 2020/02

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/jproc.2019.2954595  

    ISSN: 0018-9219

    eISSN: 1558-2256

  172. Efficient Delay-Based Internet-Wide Scanning Method for IoT Devices in Wireless LAN Peer-reviewed

    Hiroaki Hashida, Yuichi Kawamoto, Nei Kato

    IEEE Internet of Things Journal 7 (2) 1364-1374 2020/02

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/jiot.2019.2954539  

    eISSN: 2372-2541

  173. Smart and Resilient EV Charging in SDN-Enhanced Vehicular Edge Computing Networks Peer-reviewed

    Jiajia Liu, Hongzhi Guo, Jingyu Xiong, Nei Kato, Jie Zhang, Yanning Zhang

    IEEE Journal on Selected Areas in Communications 38 (1) 217-228 2020/01

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/jsac.2019.2951966  

    ISSN: 0733-8716

    eISSN: 1558-0008

  174. Flexibility-Enhanced HTS System for Disaster Management: Responding to Communication Demand Explosion in a Disaster Peer-reviewed

    Shigenori Tani, Katsuyuki Motoyoshi, Hiroyasu Sano, Atsushi Okamura, Hiroki Nishiyama, Nei Kato

    IEEE Transactions on Emerging Topics in Computing 8 (1) 159-167 2020/01/01

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tetc.2017.2688078  

    eISSN: 2376-4562

  175. When Machine Learning Meets Privacy in 6G: A Survey Peer-reviewed

    Yuanyuan Sun, Jiajia Liu, Jiadai Wang, Yurui Cao, Nei Kato

    IEEE Communications Surveys & Tutorials 22 (4) 2694-2724 2020

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/comst.2020.3011561  

    eISSN: 2373-745X

  176. HCP: Heterogeneous Computing Platform for Federated Learning Based Collaborative Content Caching Towards 6G Networks Peer-reviewed

    Zubair Md. Fadlullah, Nei Kato

    IEEE Transactions on Emerging Topics in Computing 1-1 2020

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tetc.2020.2986238  

    eISSN: 2376-4562

  177. A Network-aware Internet-wide Scan for Security Maximization of IPv6-enabled WLAN IoT Devices Peer-reviewed

    Shikhar Verma, Yuichi Kawamoto, Nei Kato

    IEEE Internet of Things Journal 1-1 2020

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/jiot.2020.3045733  

    eISSN: 2372-2541

  178. Machine Learning Meets Computation and Communication Control in Evolving Edge and Cloud: Challenges and Future Perspective Peer-reviewed

    Tiago Koketsu Rodrigues, Katsuya Suto, Hiroki Nishiyama, Jiajia Liu, Nei Kato

    IEEE Communications Surveys & Tutorials 22 (1) 38-67 2020

    DOI: 10.1109/comst.2019.2943405  

    eISSN: 2373-745X

  179. Collaborative computation offloading at UAV-enhanced edge

    Jingyu Xiong, Hongzhi Guo, Jiajia Liu, Nei Kato, Yanning Zhang

    2019 IEEE Global Communications Conference, GLOBECOM 2019 - Proceedings 2019/12/01

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/GLOBECOM38437.2019.9013956  

  180. Controlling UAV for Maximizing the Number of Receiver Vehicles in Intelligent Transportation Systems," IEEE Global Communications Conference (GLOBECOM 2019) Peer-reviewed

    Takuto Mitsuhashi, Yuichi Kawamoto, Nei Kato

    2019/12

  181. Location Awareness System for Drones Flying Beyond Visual Line of Sight Exploiting the 400 MHz Frequency Band Peer-reviewed

    Nei Kato, Yuichi Kawamoto, Akira Aneha, Yuichi Yaguchi, Ryu Miura, Hideki Nakamura, Michihiro Kobayashi, Toshihiko Henmi, Osamu Akimoto, Yoshihiro Kamisawa, Akifumi Kitashima

    IEEE Wireless Communications 26 (6) 149-155 2019/12

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/mwc.2019.1800570  

    ISSN: 1536-1284

    eISSN: 1558-0687

  182. Multilayer Virtual Cell-Based Resource Allocation in Low-Power Wide-Area Networks Peer-reviewed

    Yuichi Kawamoto, Ryota Sasazawa, Bomin Mao, Nei Kato

    IEEE Internet of Things Journal 6 (6) 10665-10674 2019/12

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/jiot.2019.2940600  

    eISSN: 2372-2541

  183. Attacker Identification and Intrusion Detection for In-Vehicle Networks Peer-reviewed

    Jing Ning, Jiadai Wang, Jiajia Liu, Nei Kato

    IEEE Communications Letters 23 (11) 1927-1930 2019/11

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/lcomm.2019.2937097  

    ISSN: 1089-7798

    eISSN: 2373-7891

  184. Harvesting and Threat Aware Security Configuration Strategy for IEEE 802.15.4 Based IoT Networks Peer-reviewed

    Bomin Mao, Yuichi Kawamoto, Jiajia Liu, Nei Kato

    IEEE Communications Letters 23 (11) 2130-2134 2019/11

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/lcomm.2019.2932988  

    ISSN: 1089-7798

    eISSN: 2373-7891

  185. On A Novel Adaptive UAV-Mounted Cloudlet-Aided Recommendation System for LBSNs Peer-reviewed

    Fengxiao Tang, Zubair Md. Fadlullah, Bomin Mao, Nei Kato, Fumie Ono, Ryu Miura

    IEEE Transactions on Emerging Topics in Computing 7 (4) 565-577 2019/10/01

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tetc.2018.2792051  

    eISSN: 2376-4562

  186. Energy-Efficient Group Paging Mechanism for QoS Constrained Mobile IoT Devices Over LTE-A Pro Networks Under 5G Peer-reviewed

    Shikhar Verma, Yuichi Kawamoto, Nei Kato

    IEEE Internet of Things Journal 6 (5) 9187-9199 2019/10

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/jiot.2019.2928589  

    eISSN: 2372-2541

  187. Physical Layer Security in Large–Scale Probabilistic Caching: Analysis and Optimization Peer-reviewed

    Shubin Zhang, Wen Sun, Jiajia Liu, Kato Nei

    IEEE Communications Letters 23 (9) 1484-1487 2019/09

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/lcomm.2019.2926967  

    ISSN: 1089-7798

    eISSN: 2373-7891

  188. Threshold-Based RRH Switching Scheme Considering Baseband Unit Aggregation for Power Saving in a Cloud Radio Access Network Peer-reviewed

    Yunseong Lee, Keisuke Miyanabe, Hiroki Nishiyama, Nei Kato, Takashi Yamada

    IEEE Systems Journal 13 (3) 2676-2687 2019/09

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/jsyst.2018.2890130  

    ISSN: 1932-8184

    eISSN: 2373-7816

  189. An Absorbing Markov Chain Based Model to Solve Computation and Communication Tradeoff in GPU-Accelerated MDRUs for Safety Confirmation in Disaster Scenarios Peer-reviewed

    Bomin Mao, Fengxiao Tang, Zubair Md. Fadlullah, Nei Kato

    IEEE Transactions on Computers 68 (9) 1256-1268 2019/09/01

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tc.2019.2906881  

    ISSN: 0018-9340

    eISSN: 2326-3814

  190. Hyperparameter Study of Machine Learning Solutions for the Edge Server Deployment Problem Peer-reviewed

    Tiago Koketsu Rodrigues, Katsuya Suto, Nei Kato

    2019 IEEE 90th Vehicular Technology Conference (VTC2019-Fall) 1-5 2019/09

    Publisher: IEEE

    DOI: 10.1109/vtcfall.2019.8891500  

  191. Optimizing Space-Air-Ground Integrated Networks by Artificial Intelligence Peer-reviewed

    Nei Kato, Zubair Md. Fadlullah, Fengxiao Tang, Bomin Mao, Shigenori Tani, Atsushi Okamura, Jiajia Liu

    IEEE Wireless Communications 26 (4) 140-147 2019/08

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/mwc.2018.1800365  

    ISSN: 1536-1284

    eISSN: 1558-0687

  192. Adaptive Power Resource Allocation With Multi-Beam Directivity Control in High-Throughput Satellite Communication Systems Peer-reviewed

    Masaki Takahashi, Yuichi Kawamoto, Nei Kato, Amane Miura, Morio Toyoshima

    IEEE Wireless Communications Letters 8 (4) 1248-1251 2019/08

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/lwc.2019.2912753  

    ISSN: 2162-2337

    eISSN: 2162-2345

  193. Efficient Resource Allocation Utilizing Q-Learning in Multiple UA Communications Peer-reviewed

    Yuichi Kawamoto, Hiroaki Takagi, Hiroki Nishiyama, Nei Kato

    IEEE Transactions on Network Science and Engineering 6 (3) 293-302 2019/07/01

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tnse.2018.2842246  

    eISSN: 2334-329X

  194. TSP Security in Intelligent and Connected Vehicles: Challenges and Solutions Peer-reviewed

    Yansong Li, Qian Luo, Jiajia Liu, Hongzhi Guo, Nei Kato

    IEEE Wireless Communications 26 (3) 125-131 2019/06

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/mwc.2019.1800289  

    ISSN: 1536-1284

    eISSN: 1558-0687

  195. On Improving Flight Energy Efficiency in Simultaneous Transmission and Reception of Relay Using UAVs Peer-reviewed

    Ayaka Hanyu, Yuichi Kawamoto, Nei Kato

    2019 15th International Wireless Communications & Mobile Computing Conference (IWCMC) 2019/06

    Publisher: IEEE

    DOI: 10.1109/iwcmc.2019.8766559  

  196. Value Iteration Architecture based Deep Learning for Intelligent Routing Exploiting Heterogeneous Computing Platforms Peer-reviewed

    Zubair Md. Fadlullah, Bomin Mao, Fengxiao Tang, Nei Kato

    IEEE Transactions on Computers 68 (6) 939-950 2019/06

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/TC.2018.2874484  

    ISSN: 0018-9340

    eISSN: 2326-3814

  197. An Intelligent Packet Forwarding Approach for Disaster Recovery Networks Peer-reviewed

    Bomin Mao, Fengxiao Tang, Zubair Md. Fadlullah, Nei Kato

    IEEE International Conference on Communications (ICC 2019) 2019/04

  198. An Internet of Things Traffic-Based Power Saving Scheme in Cloud-Radio Access Network Peer-reviewed

    Keisuke Miyanabe, Tiago Gama Rodrigues, Yunseong Lee, Hiroki Nishiyama, Nei Kato

    IEEE Internet of Things Journal 6 (2) 3087-3096 2019/04

    DOI: 10.1109/JIOT.2018.2878884  

    eISSN: 2327-4662

  199. Adaptive Frequency Band and Channel Selection for Simultaneous Receiving and Sending in Multiband Communication Peer-reviewed

    Ayaka Hanyu, Yuichi Kawamoto, Hiroki Nishiyama, Nei Kato, Naoto Egashira, Kazuto Yano, Tomoaki Kumagai

    IEEE Wireless Communications Letters 8 (2) 460-463 2019/04

    DOI: 10.1109/LWC.2018.2876258  

  200. Optimal Edge Resource Allocation in IoT-Based Smart Cities Peer-reviewed

    Lei Zhao, Jiadai Wang, Jiajia Liu, Nei Kato

    IEEE Network 33 (2) 30-35 2019/03

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/mnet.2019.1800221  

    ISSN: 0890-8044

    eISSN: 1558-156X

  201. Development of Movable and Deployable ICT Resource Unit (MDRU) and its Overseas Activities Peer-reviewed

    Yoshitaka Shimizu, Yasuo Suzuki, Ryota Sasazawa, Yuichi Kawamoto, Hiroki Nishiyama, Nei Kato, Atsushi Yamamoto, Satoshi Kotabe

    Journal of Disaster Research 14 (2) 363-374 2019/03/01

    Publisher: Fuji Technology Press Ltd.

    DOI: 10.20965/jdr.2019.p0363  

    ISSN: 1881-2473

    eISSN: 1883-8030

    More details Close

    Based on the lessons learned from the East Japan Great Earthquake of March 11, 2011, the authors have been engaged in the research and development of movable and deployable information and communication technology (ICT) resource units (MDRUs), which provide immediate and minimally required ICT service in areas struck by disaster. The MDRU is a transportable unit that contains equipment necessary for ICT service provisions and is designed to be quickly transported to and set up in affected areas after a natural disaster has struck. The unit is used to quickly construct a wireless local network in the area, and thus provide immediate and minimally required ICT service to the people in the area. In this paper, we describe MDRU technology and other technologies that lead to improved performance and/or service when connected or linked up with the unit. Along with this development, we have conducted various activities aimed at its international deployment. Specifically, we conducted trials with resident participation in the Philippines and Nepal to verify the validity of these technologies overseas, where we were able to confirm its validity under various conditions. Furthermore, we have undertaken activities for its standardization, and have succeeded in the standardization of MDRU at International Telecommunication Union Telecommunication Standardization Sector (ITU-T).

  202. Development of Resilient Information and Communications Technology for Relief Against Natural Disasters Peer-reviewed

    Hiroshi Kumagai, Hiroshi Sakurauchi, Shinsuke Koitabashi, Takeaki Uchiyama, Shinichi Sasaki, Kazuhide Noda, Makoto Ishizaki, Satoshi Kotabe, Atsushi Yamamoto, Yoshitaka Shimizu, Yasuo Suzuki, Yasunori Owada, Katsuhiro Temma, Goshi Sato, Toshiaki Miyazaki, Peng Li, Yuichi Kawamoto, Nei Kato, Hiroki Nishiyama

    Journal of Disaster Research 14 (2) 348-362 2019/03/01

    Publisher: Fuji Technology Press Ltd.

    DOI: 10.20965/jdr.2019.p0348  

    ISSN: 1881-2473

    eISSN: 1883-8030

  203. Toward Future Unmanned Aerial Vehicle Networks: Architecture, Resource Allocation and Field Experiments Peer-reviewed

    Yuichi Kawamoto, Hiroki Nishiyama, Nei Kato, Fumie Ono, Ryu Miura

    IEEE Wireless Communications Magazine 26 (1) 94-99 2019/02

    DOI: 10.1109/MWC.2018.1700368  

    ISSN: 1536-1284

    eISSN: 1558-0687

  204. Multi-hop Wireless Transmission in Multi-band WLAN Systems: Proposal and Future Perspective Peer-reviewed

    Zubair Md. Fadlullah, Yuichi Kawamoto, Hiroki Nishiyama, Nei Kato, Naoto Egashira, Kazuto Yano, Tomoaki Kumagai

    IEEE Wireless Communications Magazine (WCM) 26 (1) 108-113 2019/02

    DOI: 10.1109/MWC.2017.1700149  

  205. A Cross-Domain SDN Architecture for Multi-Layered Space-Terrestrial Integrated Networks

    Yongpeng Shi, Yurui Cao, Jiajia Liu, Nei Kato

    IEEE Network 33 (1) 29-35 2019/01/01

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/MNET.2018.1800191  

    ISSN: 1558-156X 0890-8044

  206. An Adaptive Beam Control Technique for Q Band Satellite to Maximize Diversity Gain and Mitigate Interference to Terrestrial Networks Peer-reviewed

    Shigenori Tani, Katsuyuki Motoyoshi, Hiroyasu Sano, Atsushi Okamura, Hiroki Nishiyama, Nei Kato

    IEEE Transactions on Emerging Topics in Computing (TETC) 7 (1) 115-122 2019/01

    DOI: 10.1109/TETC.2016.2606107  

  207. Networking and Communications in Autonomous Driving: A Survey Peer-reviewed

    Jiadai Wang, Jiajia Liu, Nei Kato

    IEEE Communications Surveys & Tutorials 21 (2) 1243-1274 2019

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/comst.2018.2888904  

    eISSN: 2373-745X

  208. Multilayer Virtual-Cell-Based Resource Allocation in Unmanned Aircraft Systems Peer-reviewed

    Ryota Sasazawa, Yuichi Kawamoto, Hiroki Nishiyama, Nei Kato, Fumie Ono, Ryu Miura

    IEEE Global Communications Conference (GLOBECOM 2018) 2018/12

    DOI: 10.1109/GLOCOM.2018.8648085  

  209. Deep Spatiotemporal Partially Overlapping Channel Allocation: Joint CNN and Activity Vector Approach Peer-reviewed

    Fengxiao Tang, Bomin Mao, Zubair Md. Fadlullah, Nei Kato

    IEEE Global Communications Conference (GLOBECOM 2018) 2018/12

    DOI: 10.1109/GLOCOM.2018.8647254  

  210. On Intelligent Trafic Control For Large-Scale Heterogeneous Networks: A Value Matrix-Based Deep Learning Approach Peer-reviewed

    Zubair Md. Fadlullah, Fengxiao Tang, Bomin Mao, Jiajia Liu, Nei kato

    IEEE Communication letter 22 (12) 2479-2482 2018/12

  211. Mobile-Edge Computation Offloading for Ultra-Dense IoT Networks Peer-reviewed

    Hongzhi Guo, Jiajia Liu, Jie Zhang, Wen Sun, Nei Kato

    IEEE Internet of Things Journal 5 (6) 4977-4088 2018/12

  212. An Intelligent Traffic Load Prediction Based Adaptive Channel Assignment Algorithm in SDN-IoT: A Deep Learning Approach Peer-reviewed

    Fengxiao Tang, Zubair Md. Fadlullah, Bomin Mao, Nei Kato

    IEEE Internet of Things Journal 5 (6) 5141-5154 2018/12

    DOI: 10.1109/JIOT.2018.2838574  

  213. UAV-Assisted Information Diffusion Technique with Uniquely Virtual Cells Based on Wi-Fi Direct Peer-reviewed

    Tohn Furutani, Yuichi Kawamoto, Hiroki Nishiyama, Nei Kato

    The 21st International Symposium On Wireless Personal Multimedia Communications (WPMC 2018) 2018/11

    DOI: 10.1109/WPMC.2018.8713089  

  214. A Deep Learning Based Radio Resource Assignment Technique For 5G Ultra Dense Networks Peer-reviewed

    Yibo Zhou, Zubair Md. Fadlullah, Bomin Mao, Nei Kato

    IEEE Network Magazine 32 (6) 28-34 2018/11

    DOI: 10.1109/MNET.2018.1800085  

  215. A Novel Radio Resource Optimization Method for Relay-Based Unmanned Aerial Vehicles Peer-reviewed

    Yuki Takahashi, Yuichi Kawamoto, Hiroki Nishiyama, Nei Kato, Fumie Ono, Ryu Miura

    IEEE Transactions on Wireless Communications 17 (11) 7352-7363 2018/11

    DOI: 10.1109/TWC.2018.2866576  

    ISSN: 1536-1276

    eISSN: 1558-2248

  216. ON PRELIMINARY DESIGN OF BANDWIDTH-ON-DEMAND HIGH THROUGHPUT SATELLITE COMMUNICATIONS SYSTEM TECHNOLOGY Peer-reviewed

    Amane Miura, Eihisa Morikawa, Naoko Yoshimura, Takashi Takahashi, Mitsugu Okawa, Teruaki Orikasa, Kazunori Okada, Kazuyoshi Kawasaki, Tomoshige Kan, Masaki Sato, Shinichi Kozono, Takuya Okura, Yuma Abe, Morio Toyoshima, Yuichi Kawamoto, Hiroki Nishiyama, Nei Kato, Eiichi Sakai, Terumi Sunaga, Nobuyoshi Horie, Toshiyasu Tsunoda, Arimasa Kanasashi, Masaaki Kusano, Yoshio Inasawa, Hitomi Ono

    The 24th Ka and Broadband Communications Conference 2018/10

  217. Model Predictive Joint Transmit Power Control for Improving System Availability in Energy-Harvesting Wireless Mesh Networks Peer-reviewed

    Katsuya Suto, Hiroki Nishiyama, Nei Kato, Toshiaki Kuri

    IEEE Communications Letters 22 (10) 2112-2115 2018/10

    DOI: 10.1109/LCOMM.2018.2860005  

  218. Space-Air-Ground Integrated Network: A Survey Peer-reviewed

    Jiajia Liu, Yongpeng Shi, Yongpeng Shi, Zubair Md. Fadlullah, Nei Kato

    IEEE Communications Surveys & Tutorials 20 (4) 2714-2741 2018/10

    DOI: 10.1109/COMST.2018.2841996  

  219. On Minimizing Energy Consumption in FiWi Enhanced LTE-A HetNets Peer-reviewed

    Hongzhi Guo, Jiajia Liu, Zubair Md. Fadlullah, Nei Kato

    IEEE Transactions on Emerging Topics in Computing 6 (4) 579-591 2018/10

    DOI: 10.1109/TETC.2016.2598478  

  220. Optimal Satellite Gateway Placement in Space-Ground Integrated Networks

    Yurui Cao, Hongzhi Guo, Jiajia Liu, Nei Kato

    IEEE Network 32 (5) 32-37 2018/09/01

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/MNET.2018.1800016  

    ISSN: 1558-156X 0890-8044

  221. On a Novel Deep Learning Based Intelligent Partially Overlapping Channel Assignmentin SDN-IoT Peer-reviewed

    Fengxiao Tang, Bomin Mao, Zubair Md. Fadlullah, Nei Kato

    IEEE Communication Magazine 56 (9) 80-86 2018/09

  222. Cloudlets Activation Scheme for Scalable Mobile Edge Computing with Transmission Power Control and Virtual Machine Migration Peer-reviewed

    Tiago Gama Rodrigues, Katsuya Suto, Hiroki Nishiyama, Nei Kato, Katsuhiro Temma

    ?IEEE Transactions on Computers 67 (9) 1287-1300 2018/09

    DOI: 10.1109/TC.2018.2818144  

    ISSN: 0018-9340

  223. On Extracting the Spatial-Temporal Features of Network Traffic Patterns: A Tensor Based Deep Learning Model Peer-reviewed

    Fengxiao Tang, Bomin Mao, Zubair Md. Fadlullah, Jiajia Liu, Nei Kato

    2018 International Conference on Network Infrastructure and Digital Content (IC-NIDC) 2018/08

    Publisher: IEEE

    DOI: 10.1109/icnidc.2018.8525850  

  224. A Novel Non-supervised Deep Learning Based Network Traffic Control Method for Software Defined Wireless Networks Peer-reviewed

    Bomin Mao, Fengxiao Tang, Zubair Md. Fadlullah, Nei Kato, Osamu Akashi, Takeru Inoue, Kimihiro Mizutani

    IEEE Wireless Communications Magazine 25 (4) 74-81 2018/08

    DOI: 10.1109/MWC.2018.1700417  

  225. Cross-layer Data Delivery in Satellite-Aerial-Terrestrial Communication Peer-reviewed

    Yongpeng Shi, Jiajia Liu, Zubair Md. Fadlullah, Nei Kato

    IEEE Wireless Communications Magazine 25 (3) 138-143 2018/06

    DOI: 10.1109/MWC.2018.1700354  

  226. Threshold Tuning-Based Wearable Sensor Fault Detection for Reliable Medical Monitoring Using Bayesian Network Model Peer-reviewed

    Haibin Zhang, Jiajia Liu, Nei Kato

    IEEE Systems Journal 12 (2) 1886-1896 2018/06/01

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/JSYST.2016.2600582  

    ISSN: 1937-9234 1932-8184

  227. A Novel Information Diffusing Method With Virtual Cells Based Wi-Fi Direct In Disaster Area Networks Peer-reviewed

    Tohn Furutani, Yuichi Kawamoto, Hiroki Nishiyama, Nei Kato

    IEEE Wireless Communications and Networking Conference (WCNC 2018) 2018/05

    DOI: 10.1109/WCNC.2018.8377148  

  228. Novel Group Paging Scheme for Improving Energy Efficiency of IoT Devices over LTE-A Pro Networks with QoS Considerations Peer-reviewed

    Shikhar Verma, Yuichi Kawamoto, Hiroki Nishiyama, Nei Kato, Chih-Wei Huang

    IEEE International Conference on Communications (ICC 2018) 2018-May 2018/05

    DOI: 10.1109/ICC.2018.8422102  

    ISSN: 1550-3607

  229. Virtual Cell Based Resource Allocation for Efficient Frequency Utilization in Unmanned Aircraft Systems Peer-reviewed

    Daisuke Takaishi, Yuichi Kawamoto, Hiroki Nishiyama, Nei Kato, Fumie Ono, Ryu Miura

    IEEE Transactions on Vehicular Technology 67 (4) 3495-3504 2018/04/01

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/TVT.2017.2776240  

    ISSN: 0018-9545

  230. Optimal Satellite Gateway Placement in Space-Ground Integrated Network for Latency Minimization with Reliability Guarantee Peer-reviewed

    Yurui Cao, Yongpeng Shi, Jiajia Liu, Nei Kato

    IEEE Wireless Communications Letters 7 (2) 174-177 2018/04/01

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/LWC.2017.2763149  

    ISSN: 2162-2345 2162-2337

  231. Construction of a Flexibility Analysis Model for Flexible High-Throughput Satellite Communication Systems with a Digital Channelizer Peer-reviewed

    Kazuma Kaneko, Hiroki Nishiyama, Nei Kato, Amane Miura, Morio Toyoshima

    IEEE Transactions on Vehicular Technology 67 (3) 2097-2107 2018/03/01

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/TVT.2017.2736010  

    ISSN: 0018-9545

  232. A TD-LTE-a based efficient radio access scheme for real-time data transmission over relay unmanned aerial vehicle networks Peer-reviewed

    Yuki Takahashi, Yuichi Kawamoto, Hiroki Nishiyama, Nei Kato, Fumie Ono, Ryu Miura

    IEEE Vehicular Technology Conference 2017- 1-5 2018/02/08

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/VTCFall.2017.8288380  

    ISSN: 1550-2252

  233. On physical layer security in finite-area wireless networks: An analysis framework Peer-reviewed

    Jiajia Liu, Jiahao Dai, Yongpeng Shi, Wen Sun, Nei Kato

    IEEE Vehicular Technology Conference 2017- 1-5 2018/02/08

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/VTCFall.2017.8288180  

    ISSN: 1550-2252

  234. Characterizing Flow, Application, and User Behavior in Mobile Networks: A Framework for Mobile Big Data Peer-reviewed

    Yuanyuan Qiao, Zhizhuang Xing, Zubair Md. Fadlullah, Jie Yang, Nei Kato

    IEEE Wireless Communications 25 (1) 40-49 2018/02/01

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/MWC.2018.1700186  

    ISSN: 1536-1284

  235. On Removing Routing Protocol from Future Wireless Networks: A Real-time Deep Learning Approach for Intelligent Traffic Control Peer-reviewed

    Fengxiao Tang, Bomin Mao, Zubair Md. Fadlullah, Nei Kato, Osamu Akashi, Takeru Inoue, Kimihiro Mizutani

    IEEE Wireless Communications 25 (1) 154-160 2018/02/01

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/MWC.2017.1700244  

    ISSN: 1536-1284

  236. A Tensor Based Deep Learning Technique for Intelligent Packet Routing Peer-reviewed

    Bomin Mao, Zubair Md. Fadlullah, Fengxiao Tang, Nei Kato, Osamu Akashi, Takeru Inoue, Kimihiro Mizutani

    2017 IEEE Global Communications Conference, GLOBECOM 2017 - Proceedings 2018- 1-6 2018/01/10

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/GLOCOM.2017.8254036  

  237. Multi-Carrier Relaying for Successive Data Transfer in Earth Observation Satellite Constellations Peer-reviewed

    Shigenori Tani, Michiya Hayama, Hiroki Nishiyama, Nei Kato, Katsuyuki Motoyoshi, Atsushi Okamura

    2017 IEEE Global Communications Conference, GLOBECOM 2017 - Proceedings 2018- 1-5 2018/01/10

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/GLOCOM.2017.8255099  

  238. Routing or Computing? The Paradigm Shift Towards Intelligent Computer Network Packet Transmission Based on Deep Learning Peer-reviewed

    Bomin Mao, Zubair Md. Fadlullah, Fengxiao Tang, Nei Kato, Osamu Akashi, Takeru Inoue, Kimihiro Mizutani

    IEEE TRANSACTIONS ON COMPUTERS 66 (11) 1946-1960 2017/11

    DOI: 10.1109/TC.2017.2709742  

    ISSN: 0018-9340

    eISSN: 1557-9956

  239. Postdisaster User Location Maneuvering Method for Improving the QoE Guaranteed Service Time in Energy Harvesting Small Cell Networks Peer-reviewed

    Katsuya Suto, Hiroki Nishiyama, Nei Kato

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 66 (10) 9410-9420 2017/10

    DOI: 10.1109/TVT.2017.2702750  

    ISSN: 0018-9545

    eISSN: 1939-9359

  240. A Feedback Control-Based Crowd Dynamics Management in IoT System Peer-reviewed

    Yuichi Kawamoto, Naoto Yamada, Hiroki Nishiyama, Nei Kato, Yoshitaka Shimizu, Yao Zheng

    IEEE INTERNET OF THINGS JOURNAL 4 (5) 1466-1476 2017/10

    DOI: 10.1109/JIOT.2017.2724642  

    ISSN: 2327-4662

  241. Effectively Collecting Data for the Location-Based Authentication in Internet of Things Peer-reviewed

    Yuichi Kawamoto, Hiroki Nishiyama, Nei Kato, Yoshitaka Shimizu, Atsushi Takahara, Tingting Jiang

    IEEE SYSTEMS JOURNAL 11 (3) 1403-1411 2017/09

    DOI: 10.1109/JSYST.2015.2456878  

    ISSN: 1932-8184

    eISSN: 1937-9234

  242. A Novel Embedding Method for Information Diffusion Prediction in Social Network Big Data Peer-reviewed

    Sheng Gao, Huacan Pang, Patrick Gallinari, Jun Guo, Nei Kato

    IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS 13 (4) 2097-2105 2017/08

    DOI: 10.1109/TII.2017.2684160  

    ISSN: 1551-3203

    eISSN: 1941-0050

  243. Hybrid Method for Minimizing Service Delay in Edge Cloud Computing Through VM Migration and Transmission Power Control Peer-reviewed

    Tiago Gama Rodrigues, Katsuya Suto, Hiroki Nishiyama, Nei Kato

    IEEE TRANSACTIONS ON COMPUTERS 66 (5) 810-819 2017/05

    DOI: 10.1109/TC.2016.2620469  

    ISSN: 0018-9340

    eISSN: 1557-9956

  244. A PSO Model with VM Migration and Transmission Power Control for Low Service Delay in the Multiple Cloudlets ECC Scenario Peer-reviewed

    Tiago Gama Rodrigues, Katsuya Suto, Hiroki Nishiyama, Nei Kato

    IEEE International Conference on Communications (ICC 2017) 2017/05

  245. An Evaluation of Flexible Frequency Utilization in High Throughput Satellite Communication Systems with Digital Channelizer Peer-reviewed

    Kazuma Kaneko, Hiroki Nishiyama, Nei Kato, Amane Miura, Morio Toyoshima

    IEEE International Conference on Communications (ICC 2017) 2017/05

  246. An Efficient Throughput-Aware Resource Allocation Technique for Data Transmission in Unmanned Aircraft Systems Peer-reviewed

    Yuichi Kawamoto, Hiroki Nishiyama, Nei Kato, Fumie Ono, Ryu Miura

    IEEE International Conference on Communications (ICC 2017) 2017/05

  247. A Mobility Analytical Framework for Big Mobile Data in Densely Populated Area Peer-reviewed

    Yuanyuan Qiao, Yihang Cheng, Jie Yang, Jiajia Liu, Nei Kato

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 66 (2) 1443-1455 2017/02

    DOI: 10.1109/TVT.2016.2553182  

    ISSN: 0018-9545

    eISSN: 1939-9359

  248. GT-QoSec: A Game-Theoretic Joint Optimization of QoS and Security for Differentiated Services in Next Generation Heterogeneous Networks Peer-reviewed

    Zubair Md. Fadlullah, Chao Wei, Zhiguo Shi, Nei Kato

    IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS 16 (2) 1037-1050 2017/02

    DOI: 10.1109/TWC.2016.2636186  

    ISSN: 1536-1276

    eISSN: 1558-2248

  249. State-of-the-Art Deep Learning: Evolving Machine Intelligence Toward Tomorrow's Intelligent Network Traffic Control Systems Peer-reviewed

    Zubair Md. Fadlullah, Fengxiao Tang, Bomin Mao, Nei Kato, Osamu Akashi, Takeru Inoue, Kimihiro Mizutani

    IEEE COMMUNICATIONS SURVEYS AND TUTORIALS 19 (4) 2432-2455 2017

    DOI: 10.1109/COMST.2017.2707140  

    ISSN: 1553-877X

    eISSN: 1553-877X

  250. A Survey on Network Methodologies for Real-Time Analytics of Massive IoT Data and Open Research Issues Peer-reviewed

    Shikhar Verma, Yuichi Kawamoto, Zubair Md. Fadlullah, Hiroki Nishiyama, Nei Kato

    IEEE COMMUNICATIONS SURVEYS AND TUTORIALS 19 (3) 1457-1477 2017

    DOI: 10.1109/COMST.2017.2694469  

    ISSN: 1553-877X

  251. QoE-Guaranteed and Sustainable User Position Guidance for Post-Disaster Cloud Radio Access Network Peer-reviewed

    Katsuya Suto, Tiago Gama Rodrigues, Hiroki Nishiyama, Nei Kato, Hirotaka Ujikawa, Ken-Ichi Suzuki

    IEEE Global Communications Conference (GLOBECOM 2016) 2016/12

    DOI: 10.1109/GLOCOM.2016.7842184  

  252. Optimizing Uplink Resource Allocation for D2D Overlaying Cellular Networks with Power Control Peer-reviewed

    Jiajia Liu, Jiahao Dai, Nei Kato, Nirwan Ansari

    IEEE Global Communications Conference (GLOBECOM 2016) 2016/12

    DOI: 10.1109/GLOCOM.2016.7842111  

  253. Towards a Low-Delay Edge Cloud Computing Through a Combined Communication and Computation Approach Peer-reviewed

    Tiago Gama Rodrigues, Katsuya Suto, Hiroki Nishiyama, Nei Kato, Kmihiro Mizutani, Takeru Inoue, Osamu Akashi

    IEEE 84th Vehicular Technology Conference (VTC 2016 Fall) 2016/09

    DOI: 10.1109/VTCFall.2016.7881581  

  254. Reliability Evaluation for NFV Deployment of Future Mobile Broadband Networks Peer-reviewed

    Jiajia Liu, Nei Kato, Osamu Akashi, Atsushi Takahara

    IEEE Wireless Communications Magazine ol. 23, no. 3 2016/06

    DOI: 10.1109/MWC.2016.7498079  

  255. Joint Optimization of QoS and Security for Differentiated Applications in Heterogeneous Networks Peer-reviewed

    Zubair Md. Fadlullah, Wei Chao, Zhiguo Shi, Nei Kato

    IEEE Wireless Communications Magazine 2016/06

    DOI: 10.1109/MWC.2016.7498077  

  256. DAPA: Capacity Optimization in Wireless Networks Through a Combined Design of Density of Access Points and Partially Overlapped Channel Allocation Peer-reviewed

    Wei Zhao, Hiroki Nishiyama, Zubair Fadlullah, Nei Kato, Kiyoshi Hamaguchi

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 65 (5) 3715-3722 2016/05

    DOI: 10.1109/TVT.2015.2437714  

    ISSN: 0018-9545

    eISSN: 1939-9359

  257. A Novel Graph-based Topology Control Cooperative Algorithm for Maximizing Throughput of Disaster Recovery Networks Peer-reviewed

    Thuan Ngo, Hiroki Nishiyama, Nei Kato, Satoshi Kotabe, Hiroshi Tohjo

    2016 IEEE 83rd Vehicular Technology Conference (VTC2016-Spring) 2016/05

    DOI: 10.1109/VTCSpring.2016.7504088  

  258. A Mobility-Based Mode Selection Technique for Fair Spatial Dissemination of Data in Multi-Channel Device-to-Device Communication Peer-reviewed

    Hideki Kuribayashi, Katsuya Suto, Hiroki Nishiyama, Nei Kato, Kimihiro Mizutani, Takeru Inoue, Osamu Akashi

    IEEE International Conference on Communications (ICC 2016) 2016/05

    DOI: 10.1109/ICC.2016.7510608  

  259. GHAR: Graph-based Hybrid Adaptive Routing for Cognitive Radio Based Disaster Response Networks Peer-reviewed

    Thuan Ngo, Hiroki Nishiyama, Nei Kato, Satoshi Kotabe, Hiroshi Tohjo

    IEEE International Conference on Communications (ICC 2016) 2016/05

    DOI: 10.1109/ICC.2016.7510789  

  260. An Adaptive Beam Control Technique for Diversity Gain Maximization in LEO Satellite to Ground Peer-reviewed

    Shigenori Tani, Katsuyuki Motoyoshi, Hiroyasu Sano, Atsushi Okamura, Hiroki Nishiyama, Nei Kato

    IEEE International Conference on Communications (ICC 2016) 2016/05

    DOI: 10.1109/ICC.2016.7510942  

  261. Throughput Maximization for Long-Distance Real-Time Data Transmission over Multiple UAVs Peer-reviewed

    Masanori Horiuchi, Hiroki Nishiyama, Nei Kato, Fumie Ono, Ryu Miura

    IEEE International Conference on Communications (ICC 2016) 2016/05

    DOI: 10.1109/ICC.2016.7510735  

  262. Divide-and-Conquer Based Cooperative Jamming: Addressing Multiple Eavesdroppers in Close Proximity Peer-reviewed

    Zhihong Liu, Jiajia Liu, Nei Kato, Jianfeng Ma, Qiping Huang

    The 35th Annual IEEE International Conference on Computer Communications (INFOCOM 2016) 2016/04

    DOI: 10.1109/INFOCOM.2016.7524448  

  263. Virtual-MIMO-Boosted Information Propagation on Highways Peer-reviewed

    Zhaoyang Zhang, Hui Wu, Huazi Zhang, Huaiyu Dai, Nei Kato

    IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS 15 (2) 1420-1431 2016/02

    DOI: 10.1109/TWC.2015.2489661  

    ISSN: 1536-1276

    eISSN: 1558-2248

  264. QoE-Guaranteed and Power-Efficient Network Operation for Cloud Radio Access Network with Power over Fiber Peer-reviewed

    Katsuya Suto, Keisuke Miyanabe, Hiroki Nishiyama, Nei Kato, Hirotaka Ujikawa, Ken-Ichi Suzuki

    IEEE Transactions on Computational Social Systems 2016/02

    DOI: 10.1109/TCSS.2016.2518208  

  265. Bringing Movable and Deployable Networks to Disaster Areas: Development and Field Test of MDRU Peer-reviewed

    Toshikazu Sakano, Satoshi Kotabe, Tetsuro Komukai, Tomoaki Kumagai, Yoshitaka Shimizu, Atsushi Takahara, Thuan Ngo, Zubair Md. Fadlullah, Hiroki Nishiyama, Nei Kato

    IEEE Network Magazine 2016/01

    DOI: 10.1109/MNET.2016.7389836  

  266. Dynamic Trajectory Control Algorithm for Improving the Communication Throughput and Delay in UAV-aided Networks Peer-reviewed

    Zubair Md. Fadlullah, Daisuke Takaishi, Hiroki Nishiyama, Nei Kato, Ryu MiuraA

    IEEE Network 2016/01

    DOI: 10.1109/MNET.2016.7389838  

  267. A Markovian Analysis for Explicit Probabilistic Stopping-Based Information Propagation in Postdisaster Ad Hoc Mobile Networks Peer-reviewed

    Jiajia Liu, Nei Kato

    IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS 15 (1) 81-90 2016/01

    DOI: 10.1109/TWC.2015.2466621  

    ISSN: 1536-1276

    eISSN: 1558-2248

  268. On the Outage Probability of Device-to-Device-Communication-Enabled Multichannel Cellular Networks: An RSS-Threshold-Based Perspective Peer-reviewed

    Jiajia Liu, Hiroki Nishiyama, Nei Kato, Jun Guo

    IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS 34 (1) 163-175 2016/01

    DOI: 10.1109/JSAC.2015.2452492  

    ISSN: 0733-8716

    eISSN: 1558-0008

  269. New Perspectives on Future Smart FiWi Networks: Scalability, Reliability, and Energy Efficiency Peer-reviewed

    Jiajia Liu, Hongzhi Guo, Hiroki Nishiyama, Hirotaka Ujikawa, Kenichi Suzuki, Nei Kato

    IEEE COMMUNICATIONS SURVEYS AND TUTORIALS 18 (2) 1045-1072 2016

    DOI: 10.1109/COMST.2015.2500960  

    ISSN: 1553-877X

  270. Relay by Smart Device Innovative Communications for Efficient Information Sharing Among Vehicles and Pedestrians Peer-reviewed

    Hiroki Nishiyama, Thuan Ngo, Shoki Oiyama, Nei Kato

    IEEE VEHICULAR TECHNOLOGY MAGAZINE 10 (4) 54-62 2015/12

    DOI: 10.1109/MVT.2015.2481558  

    ISSN: 1556-6072

    eISSN: 1556-6080

  271. A Power-Aware Air Interface Scheduling Scheme for Improving Network Connectivity in Solar Powered Wireless Mesh Networks Peer-reviewed

    Kenta Ito, Hiroki Nishiyama, Nei Kato, Atsushi Takahara

    IEEE Global Communications Conference (GLOBECOM 2015) 2015/12

    DOI: 10.1109/GLOCOM.2014.7417325  

  272. A Novel Network Design and Operation for Reducing Transmission Power in Cloud Radio Access Network with Power over Fiber Peer-reviewed

    Yunseong Lee, Katsuya Suto, Hiroki Nishiyama, Nei Kato, Hirotaka Ujikawa, Ken-Ichi Suzuki

    IEEE/CIC International Conference on Communications in China (ICCC 2015) 2015/11

    DOI: 10.1109/ICCChina.2015.7448616  

  273. Dynamic Replication and Forwarding Control Based on Node Surroundings in Cooperative Delay-Tolerant Networks Peer-reviewed

    Hiroki Nishiyama, Asato Takahashi, Nei Kato, Katsuya Nakahira, Takatoshi Sugiyama

    IEEE TRANSACTIONS ON PARALLEL AND DISTRIBUTED SYSTEMS 26 (10) 2711-2719 2015/10

    DOI: 10.1109/TPDS.2014.2359889  

    ISSN: 1045-9219

    eISSN: 1558-2183

  274. A Cooperative ONU Sleep Method for Reducing Latency and Energy Consumption of STA in Smart-FiWi Networks Peer-reviewed

    Hiroki Nishiyama, Ko Togashi, Yuichi Kawamoto, Nei Kato

    IEEE TRANSACTIONS ON PARALLEL AND DISTRIBUTED SYSTEMS 26 (10) 2621-2629 2015/10

    DOI: 10.1109/TPDS.2014.2360405  

    ISSN: 1045-9219

    eISSN: 1558-2183

  275. A Modeling Technique Utilizing Feedback Control Theory for Performance Evaluation of IoT System in Real Time Peer-reviewed

    Keisuke Sato, Yuichi Kawamoto, Hiroki Nishiyama, Nei Kato, Yoshitaka Shimizu

    2015 International Conference on Wireless Communications and Signal Processing(WCSP 2015) 2015/10

    DOI: 10.1109/WCSP.2015.7341303  

  276. A cloud radio access network with power over fiber toward 5G networks: QoE-guaranteed design and operation Peer-reviewed

    Keisuke MIYANABE, Katsuya Suto, Zubair Md. Fadlullah, Hiroki Nishiyama, Nei Kato, Hirotaka Ujikawa, Ken-Ichi Suzuki

    IEEE Wireless Communications 2015/08

    DOI: 10.1109/MWC.2015.7224728  

  277. A Scheduled Grouping Scheme for MTC Device ID Sharing Peer-reviewed

    Chi-Wei Tseng, Rubbens Boisgueney, Chih-Wei Huangy, Phone Lin, Yuichi Kawamoto

    International Wireless Communications & Mobile Computing Conference (IWCMC 2015) 2015/08

    DOI: 10.1109/IWCMC.2015.7289271  

  278. On the Energy-Efficient of Throughput-Based Scheme Using Renewable Energy for Wireless Mesh Networks in Disaster Area Peer-reviewed

    Meng Li, Hiroki Nishiyama, Nei Kato, Yasunori Owada, Kiyoshi Hamaguchi

    IEEE TRANSACTIONS ON EMERGING TOPICS IN COMPUTING 3 (3) 420-431 2015/07

    DOI: 10.1109/TETC.2014.2386135  

    ISSN: 2168-6750

  279. Device-to-Device Communications for Enhancing Quality of Experience in Software Defined Multi-Tier LTE-A Networks Peer-reviewed

    Jiajia Liu, Shangwei Zhang, Nei Kato, Hirotaka Ujikawa, Kenichi Suzuki

    IEEE Network 2015/07

    DOI: 10.1109/MNET.2015.7166190  

  280. Field Measurement of an Implemented Solar Powered BS-based Wireless Mesh Network Peer-reviewed

    Zubair Md. Fadlullah, Tota Nakajo, Hiroki Nishiyama, Yasunori Owada, Kiyoshi Hamaguchi, Nei Kato

    IEEE Wireless Communications Magazine 2015/06

    DOI: 10.1109/MWC.2015.7143337  

  281. A Method for Collecting Uniform Amount of Fresh Data from Areas with Varying Population Density Peer-reviewed

    Yuichi Kawamoto, Takayuki Nakazawa, Hiroki Nishiyama, Nei Kato, Yoshitaka Shimizu, Tingting Jiang

    IEEE International Conference on Communications (ICC 2015) 2015/06

    DOI: 10.1109/ICC.2015.7249188  

  282. Earth Stations Deployment for Maximizing System Throughput in Satellite/Solar-Powered Mesh Integrated Network Peer-reviewed

    Shin Koseki, Hiroki Nishiyama, Nei Kato, Byongpyo Jeong, Morio Toyoshima

    IEEE International Conference on Communications (ICC 2015) 2015/06

    DOI: 10.1109/ICC.2015.7248425  

  283. Average Rate Analysis for a D2D Overlaying Two-Tier Downlink Cellular Network Peer-reviewed

    Shangwei Zhang, Jiajia Liu, Nei Kato, Hirotaka Ujikawa, Ken-Ichi Suzuki

    IEEE International Conference on Communications (ICC 2015) 2015/06

    DOI: 10.1109/ICC.2015.7248846  

  284. Bus-Ads: Bus-based Priced Advertising in VANETs using Coalition Formation Game Peer-reviewed

    Shucong Jia, Zishan Liu, Konglin Zhu, Lin Zhang, Z. M. Fadlullah, Nei Kato

    IEEE International Conference on Communications (ICC 2015) 2015/06

    DOI: 10.1109/ICC.2015.7248888  

  285. Global and Individual Mobility Pattern Discovery Based on Hotspots Peer-reviewed

    Jie Yang, Xinyu Zhang, Yuanyuan Qiao, Zubair Md. Fadlullah, Nei Kato

    IEEE International Conference on Communications (ICC 2015) 2015/06

    DOI: 10.1109/ICC.2015.7249211  

  286. Device-to-Device Communication Overlaying Two-HopMulti-Channel Uplink Cellular Networks Peer-reviewed

    Jiajia Liu, Nei Kato

    The 16th ACM InternationalSymposium on Mobile Ad Hoc Networking and Computing 2015/06

  287. An efficient utilization of intermittent surface-satellite optical links by using mass storage device embedded in satellites Peer-reviewed

    Kazuma Kaneko, Yuichi Kawamoto, Hiroki Nishiyama, Nei Kato, Mario Toyoshima

    PERFORMANCE EVALUATION 87 37-46 2015/05

    DOI: 10.1016/j.peva.2015.01.004  

    ISSN: 0166-5316

    eISSN: 1872-745X

  288. A Stochastic Geometry Analysis of D2D Overlaying Multi-Channel Downlink Cellular Networks Peer-reviewed

    Jiajia Liu, Shangwei Zhang, Hiroki Nishiyama, Nei Kato, Jun Guo

    The 34th Annual IEEE International Conference on Computer Communications (INFOCOM 2015) 2015/05

    DOI: 10.1109/INFOCOM.2015.7218366  

  289. A Failure-Tolerant and Spectrum-Efficient Wireless Data Center Network Design for Improving Performance of Big Date Mining Peer-reviewed

    Katsuya Suto, Hiroki Nishiyama, Nei Kato, Takayuki Nakachi, Toshikazu Sakano, Atsushi Takahara

    IEEE 81th Vehicular Technology Conference (VTC 2015 Spring) 2015/05

    DOI: 10.1109/VTCSpring.2015.7145601  

  290. A MPCP-Based Centralized Rate Control Method for Mobile Stations in FiWi Access Networks Peer-reviewed

    Kei Saito, Hiroki Nishiyama, Nei Kato, Hirotaka Ujikawa, Ken-Ichi Suzuki

    IEEE WIRELESS COMMUNICATIONS LETTERS 4 (2) 205-208 2015/04

    DOI: 10.1109/LWC.2015.2396913  

    ISSN: 2162-2337

    eISSN: 2162-2345

  291. Throughput and Delay Tradeoffs for Mobile Ad Hoc Networks With Reference Point Group Mobility Peer-reviewed

    Jiajia Liu, Nei Kato, Jianfeng Ma, Toshikazu Sakano

    IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS 14 (3) 1266-1279 2015/03

    DOI: 10.1109/TWC.2014.2365553  

    ISSN: 1536-1276

    eISSN: 1558-2248

  292. A Novel Access Control Scheme to Construct Fresh Database of Ambient Information in Internet of Things Peer-reviewed

    Yuichi Kawamoto, Hiroki Nishiyama, Nei Kato, Yoshitaka Shimizu, Atsushi Takahara, Tingting Jiang

    IEEE Wireless Communications and Networking Conference (WCNC 2015) 2015/03

    DOI: 10.1109/WCNC.2015.7127591  

  293. Characterizing and Modeling of Large-Scale Traffic in Mobile Network Peer-reviewed

    Jie Yang, Weicheng Li, Yuanyuan Qiao, Zubair Md. Fadlullah, Nei Kat

    IEEE Wireless Communications and Networking Conference (WCNC 2015) 2015/03

    DOI: 10.1109/WCNC.2015.7127572  

  294. The Efficient Frequency Sharing in Integrated Satellite/Terrestrial Systems

    Tohoku-Section Joint Convention Record of Institutes of Electrical and Information Engineers, Japan 2015 24-24 2015

    Publisher: Organizing Committee of Tohoku-Section Joint Convention of Institutes of Electrical and Information Engineers, Japan

    DOI: 10.11528/tsjc.2015.0_24  

  295. レイヤ2ブロードキャストと位置情報を用いたマルチホップ端末間通信方式の検討

    村山 大貴, 西山 大樹, 加藤 寧

    電気関係学会東北支部連合大会講演論文集 2015 202-202 2015

    Publisher: 電気関係学会東北支部連合大会実行委員会

    DOI: 10.11528/tsjc.2015.0_202  

  296. Toward Fair Maximization of Energy Efficiency in Multiple UAS-Aided Networks: A Game-Theoretic Methodology Peer-reviewed

    Ahmed E. A. A. Abdulla, Zubair Md. Fadlullah, Hiroki Nishiyama, Nei Kato, Fumie Ono, Ryu Miura

    IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS 14 (1) 305-316 2015/01

    DOI: 10.1109/TWC.2014.2343219  

    ISSN: 1536-1276

    eISSN: 1558-2248

  297. An Energy-Efficient and Delay-Aware Wireless Computing System for Industrial Wireless Sensor Networks Peer-reviewed

    Katsuya Suto, Hiroki Nishiyama, Nei Kato, Chih-Wei Huang

    IEEE ACCESS 3 1026-1035 2015

    DOI: 10.1109/ACCESS.2015.2443171  

    ISSN: 2169-3536

  298. Device-to-Device Communication in LTE-Advanced Networks: A Survey Peer-reviewed

    Jiajia Liu, Nei Kato, Jianfeng Ma, Naoto Kadowaki

    IEEE COMMUNICATIONS SURVEYS AND TUTORIALS 17 (4) 1923-1940 2015

    DOI: 10.1109/COMST.2014.2375934  

    ISSN: 1553-877X

  299. An Efficient Utilization of Intermittent Satellite-to-Ground Links by Using Mass Storage Device Embedded in Satellites Peer-reviewed

    Kazuma Kaneko, Yuichi Kawamoto, Hiroki Nishiyama, Nei Kato, Morio Toyoshima

    IEEE Global Communications Conference (GLOBECOM 2014) 2014/12

    DOI: 10.1109/GLOCOM.2014.7037242  

  300. On Joint Optimal Placement of Access Points and Partially Overlapping Channel Assignment for Wireless Networks Peer-reviewed

    Wei Zhao, Zubair Md. Fadlullah, Hiroki Nishiyama, Nei Kato, Kiyoshi Hamaguchi

    IEEE Global Communications Conference (GLOBECOM 2014) 2014/12

    DOI: 10.1109/GLOCOM.2014.7037585  

  301. A Novel Distributed Algorithm for Power Loss Minimizing in Smart Grid Peer-reviewed

    Wei Chao, Zubair Md. Fadlullah, Nei Kato, Ivan Stojmenovic

    2014 IEEE International Conference on Smart Grid Communications 2014/11

    DOI: 10.1109/SmartGridComm.2014.7007661  

  302. Internet of Things (IoT): Present State and Future Prospects Peer-reviewed

    Yuichi Kawamoto, Hiroki Nishiyama, Nei Kato, Naoko Yoshimura, Shinichi Yamamoto

    IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS E97D (10) 2568-2575 2014/10

    DOI: 10.1587/transinf.2013THP0009  

    ISSN: 1745-1361

  303. Joint Design of Density of Access Points and Partially Overlapped Channel Assignment for Capacity Optimization in Wireless Networks Peer-reviewed

    Wei Zhao, Zubair Md. Fadlullah, Hiroki Nishiyama, Nei Kato, Kiyoshi Hamaguchi

    2014 International Conference on Wireless Communications and Signal Processing (WCSP 2014) 2014/10

    DOI: 10.1109/WCSP.2014.6992034  

  304. Replication Control for Ensuring Reliability of Convergecast Message Delivery in Infrastructure-Aided DTNs Peer-reviewed

    Asato Takahashi, Hiroki Nishiyama, Nei Kato, Katsuya Nakahira, Takatoshi Sugiyama

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 63 (7) 3223-3231 2014/09

    DOI: 10.1109/TVT.2014.2299288  

    ISSN: 0018-9545

    eISSN: 1939-9359

  305. GT-CFS: A Game Theoretic Coalition Formulation Strategy for Reducing Power Loss in Micro Grids Peer-reviewed

    Chao Wei, Zubair Md. Fadlullah, Nei Kato, Akira Takeuchi

    IEEE TRANSACTIONS ON PARALLEL AND DISTRIBUTED SYSTEMS 25 (9) 2307-2317 2014/09

    DOI: 10.1109/TPDS.2013.178  

    ISSN: 1045-9219

    eISSN: 1558-2183

  306. Synchronized Power Saving Mechanisms for Battery-Powered Mobile Terminals in Smart FiWi Networks Peer-reviewed

    Keisuke Miyanabe, Hiroki Nishiyama, Nei Kato, Hirotaka Ujikawa, Ken-Ichi Suzuki, Naoto Yoshimoto

    IEEE 80th Vehicular Technology Conference (VTC 2014 Fall) 2014/09

    DOI: 10.1109/VTCFall.2014.6966197  

  307. Resource Allocation for Data Gathering in UAV-aided Wireless Sensor Networks Peer-reviewed

    Zanjie Huang, Hiroki Nishiyama, Nei Kato, Fumie Ono, Ryu Miura, Baohua Zhao

    IEEE International Conference on Network Infrastructure and Digital Content (IC-NIDC 2014) 2014/09

    DOI: 10.1109/ICNIDC.2014.7000256  

  308. On Energy Efficient Scheduling and Load Distribution Based on Renewable Energy for Wireless Mesh Network in Disaster Area Peer-reviewed

    Meng Li, Hiroki Nishiyama, Yasunori Owada, Kiyoshi Hamaguchi

    The 13th IEEE International Conference on Trust, Security and Privacy in Computing and Communications (IEEE TrustCom-14) 2014/09

  309. Context-aware Task Allocation for Fast Parallel Big Data Processing in Optical-Wireless Networks Invited Peer-reviewed

    Katsuya Suto, Hiroki Nishiyama, Nei Kato

    International Wireless Communications and Mobile Computing Conference (IWCMC 2014) 2014/08

    DOI: 10.1109/IWCMC.2014.6906394  

  310. Toward Integrating Overlay and Physical Networks for Robust Parallel Processing Architecture Peer-reviewed

    Katsuya Suto, Hiroki Nishiyama, Nei Kato, Takayuki Nakachi, Tatsuya Fujii, Atsushi Takahara

    IEEE Network 2014/07

    DOI: 10.1109/MNET.2014.6863130  

  311. A Partially Centralized Messaging Control Scheme Using Star Topology in Delay and Disruption Tolerant Networks Peer-reviewed

    Shoki Oiyama, Hiroki Nishiyama, Nei Kato

    2014 International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS) 2014/07

    DOI: 10.1109/SPECTS.2014.6879995  

  312. A Dynamic Trajectory Control Algorithm for Improving the Probability of End-to-End Link Connection in Unmanned Aerial Vehicle Networks Peer-reviewed

    Daisuke Takaishi, Hiroki Nishiyama, Nei Kato, Ryu Miura

    International Conference on Personal Satellite Services (PSATS2014) 2014/07

  313. An Overlay-Based Data Mining Architecture Tolerant to Physical Network Disruptions Peer-reviewed

    Katsuya Suto, Hiroki Nishiyama, Nei Kato, Kimihiro Mizutani, Osamu Akashi, Atsushi Takahara

    IEEE TRANSACTIONS ON EMERGING TOPICS IN COMPUTING 2 (3) 292-301 2014/07

    DOI: 10.1109/TETC.2014.2330517  

    ISSN: 2168-6750

  314. Toward Energy Efficient Big Data Gathering in Densely Distributed Sensor Networks Peer-reviewed

    Daisuke Takaishi, Hiroki Nishiyama, Nei Kato, Ryu Miura

    IEEE TRANSACTIONS ON EMERGING TOPICS IN COMPUTING 2 (3) 388-397 2014/07

    DOI: 10.1109/TETC.2014.2318177  

    ISSN: 2168-6750

  315. Prospects and Challenges of Context-aware Multimedia Content Delivery in Cooperative Satellite and Terrestrial Networks Peer-reviewed

    Yuichi Kawamoto, Zubair Md. Fadlullah, Hiroki Nishiyama, Nei Kato, Morio Toyoshima

    IEEE Communications Magazine 2014/06

    DOI: 10.1109/MCOM.2014.6829945  

  316. A Spectrum- and Energy-Efficient Scheme for Improving the Utilization of MDRU-Based Disaster Resilient Networks Peer-reviewed

    Thuan Ngo, Hiroki Nishiyama, Nei Kato, Toshikazu Sakano, Atsushi Takahara

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 63 (5) 2027-2037 2014/06

    DOI: 10.1109/TVT.2014.2314462  

    ISSN: 0018-9545

    eISSN: 1939-9359

  317. GTES: An Optimized Game-Theoretic Demand-Side Management Scheme for Smart Grid Peer-reviewed

    Zubair Md. Fadlullah, Duong Minh Quan, Nei Kato, Ivan Stojmenovic

    IEEE SYSTEMS JOURNAL 8 (2) 588-597 2014/06

    DOI: 10.1109/JSYST.2013.2260934  

    ISSN: 1932-8184

    eISSN: 1937-9234

  318. A Performance Evaluation of Multiple MDRUs Based Wireless Mesh Networks Peer-reviewed

    Panu Avakul, Hiroki Nishiyama, Nei Kato, Toshikazu Sakano, Atsushi Takahara

    IEEE 79th Vehicular Technology Conference (VTC 2014 Spring) 2014/05

    DOI: 10.1109/VTCSpring.2014.7022788  

  319. An Optimal Data Collection Technique for Improved Utility in UAS-aided Networks Peer-reviewed

    Ahmed E.A.A. Abdulla, Zubair Md. Fadlullah, Hiroki Nishiyama, Nei Kato, Fumie Ono, Ryu Miura

    The 33rd Annual IEEE International Conference on Computer Communications (INFOCOM) 2014/05

    DOI: 10.1109/INFOCOM.2014.6848000  

  320. Throughput-Delay Tradeoff in Mobile Ad Hoc Networks with Correlated Mobility Peer-reviewed

    Jiajia Liu, Hiroki Nishiyama, Nei Kato, Jianfeng Ma, Xiaohong Jiang

    The 33rd Annual IEEE International Conference on Computer Communications (INFOCOM) 2014/05

    DOI: 10.1109/INFOCOM.2014.6848226  

  321. Device-to-Device Communications Achieve Efficient Load Balancing in LTE-Advanced Networks Peer-reviewed

    Jiajia Liu, Yuichi Kawamoto, Hiroki Nishiyama, Nei Kato, Naoto Kadowaki

    IEEE Wireless Communications Magazine 2014/04

    DOI: 10.1109/MWC.2014.6812292  

  322. Relay-by-Smartphone: Realizing Multi-Hop Device-to-Device Communications Peer-reviewed

    Hiroki Nishiyama, Masaya Ito, Nei Kato

    IEEE Communications Magazine 2014/04

    DOI: 10.1109/MCOM.2014.6807947  

  323. An Efficient Traffic Detouring Method by Using Device-to-Device Communication Technologies in Heterogeneous Network Peer-reviewed

    Yuichi Kawamoto, Jiajia Liu, Hiroki Nishiyama, Nei Kato

    IEEE Wireless Communications and Networking Conference (WCNC 2014) 2014/04

    DOI: 10.1109/WCNC.2014.6952644  

  324. On Efficient Traffic Distribution for Disaster Area Communication Using Wireless Mesh Networks Peer-reviewed

    Mostafa M. Fouda, Hiroki Nishiyama, Ryu Miura, Nei Kato

    WIRELESS PERSONAL COMMUNICATIONS 74 (4) 1311-1327 2014/02

    DOI: 10.1007/s11277-013-1579-9  

    ISSN: 0929-6212

    eISSN: 1572-834X

  325. Traffic Pattern-Based Content Leakage Detection for Trusted Content Delivery Networks Peer-reviewed

    Hiroki Nishiyama, Desmond Fomo, Zubair Md Fadlullah, Nei Kato

    IEEE TRANSACTIONS ON PARALLEL AND DISTRIBUTED SYSTEMS 25 (2) 301-309 2014/02

    DOI: 10.1109/TPDS.2013.32  

    ISSN: 1045-9219

    eISSN: 1558-2183

  326. A Novel Communication Mode Selection Technique for DTN over MANET Architecture Peer-reviewed

    Masaya Ito, Hiroki Nishiyama, Nei Kato

    International Conference on Computing, Networking and Communications (ICNC 2014) 2014/02

    DOI: 10.1109/ICCNC.2014.6785395  

  327. An Overlay Network Construction Technique for Minimizing the Impact of Physical Network Disruption in Cloud Storage Systems Peer-reviewed

    Katsuya Suto, Hiroki Nishiyama, Nei Kato, Takayuki Nakachi, Tatsuya Fujii, Atsushi Takahara

    International Conference on Computing, Networking and Communications (ICNC 2014) 2014/02

    DOI: 10.1109/ICCNC.2014.6785307  

  328. An energy efficient upload transmission method in storage-embedded wireless mesh networks Peer-reviewed

    Shintaro Arai, Katsuya Suto, Hiroki Nishiyama

    2014 IEEE International Conference on Communications, ICC 2014 2785-2790 2014

    Publisher: IEEE Computer Society

    DOI: 10.1109/ICC.2014.6883746  

  329. MA-LTRT : A novel method to improve network connectivity and power consumption in mobile Ad-hoc based cyber-physical systems Peer-reviewed

    Yuichi Kawamoto, Hiroki Nishiyama, Nei Kato

    IEEE Transactions on Emerging Topics in Computing 1 (2) 366-374 2013/12/01

    Publisher: IEEE Computer Society

    DOI: 10.1109/TETC.2013.2278707  

    ISSN: 2168-6750

  330. Towards Modeling Ad Hoc Networks: Current Situation and Future Direction Peer-reviewed

    Jiajia Liu, Hiroki Nishiyama, Nei Kato, Tomoaki Kumagai, Atsushi Takahara

    IEEE Wireless Communications 2013/12

    DOI: 10.1109/MWC.2013.6704474  

  331. Cross Layer Analysis on ONU Energy Consumption in Smart FiWi Networks Peer-reviewed

    Ko Togashi, Hiroki Nishiyama, Nei Kato, Hirotaka Ujikawa, Ken-Ichi Suzuki, Naoto Yoshimoto

    IEEE WIRELESS COMMUNICATIONS LETTERS 2 (6) 695-698 2013/12

    DOI: 10.1109/WCL.2013.100913.130505  

    ISSN: 2162-2337

    eISSN: 2162-2345

  332. Modeling Ad Hoc Mobile Networks: the General k-Hop Relay Routing Peer-reviewed

    Jiajia Liu, Hiroki NishiyamaNei, Kato, Tomoaki Kumagai, Atsushi Takahara

    IEEE Global Communications Conference (GLOBECOM) 2013/12

    DOI: 10.1109/GLOCOM.2013.6831042  

  333. Improving the Performance of FiWi Networks Through Collaboration Between ONU and APs Peer-reviewed

    Kei Saito, Hiroki Nishiyama, Nei Kato, Hirotaka Ujikawa, Ken-Ichi Suzuki, Naoto Yoshimoto

    IEEE Global Communications Conference (GLOBECOM) 2013/12

  334. A Novel Routing Method for Improving Message Delivery Delay in Hybrid DTN-MANET Networks Peer-reviewed

    Masaya Ito, Hiroki Nishiyama, Nei Kato

    IEEE Global Communications Conference (GLOBECOM) 2013/12

    DOI: 10.1109/GLOCOM.2013.6831050  

  335. A Centralized Multiple Access Scheme for Data Gathering in Satellite-Routed Sensor System (SRSS) Peer-reviewed

    Yuichi Kawamoto, Hiroki Nishiyama, Nei Kato, Shinichi Yamamoto, Naoko Yoshimura, Naoto Kadowaki

    IEEE Global Communications Conference (GLOBECOM) 2013/12

    DOI: 10.1109/GLOCOM.2013.6831531  

  336. Effective Data Collection via Satellite-Routed Sensor System (SRSS) to Realize Global-Scaled Internet of Things Peer-reviewed

    Yuichi Kawamoto, Hiroki Nishiyama, Zubair Md Fadlullah, Nei Kato

    IEEE SENSORS JOURNAL 13 (10) 3645-3654 2013/10

    DOI: 10.1109/JSEN.2013.2262676  

    ISSN: 1530-437X

    eISSN: 1558-1748

  337. On the Fast-Convergence of Delay-Based Load Balancing over Multipaths for Dynamic Traffic Environments Peer-reviewed

    Meng Li, Hiroki Nishiyama, Nei Kato, Kimihiro Mizutani, Osamu Akashi, Atsushi Takahara

    2013 International Conference on Wireless Communications and Signal Processing (WCSP 2013) 2013/10

    DOI: 10.1109/WCSP.2013.6677078  

  338. A Traffic Distribution Technique to Minimize Packet Delivery Delay in Multilayered Satellite Networks Peer-reviewed

    Yuichi Kawamoto, Hiroki Nishiyama, Nei Kato, Naoto Kadowaki

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 62 (7) 3315-3324 2013/09

    DOI: 10.1109/TVT.2013.2256812  

    ISSN: 0018-9545

  339. A novel gateway selection technique for throughput optimization in configurable wireless mesh networks Peer-reviewed

    Wei Liu, Hiroki Nishiyama, Nei Kato, Yoshitaka Shimizu, Tomoaki Kumagai

    International Journal of Wireless Information Networks 20 (3) 195-203 2013/09

    DOI: 10.1007/s10776-013-0203-y  

    ISSN: 1068-9605 1572-8129

  340. On Characterizing Peer-to-Peer Streaming Traffic Peer-reviewed

    Jie Yang, Lun Yuan, Chao Dong, Gang Cheng, Nirwan Ansari, Nei Kato

    IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS 31 (9) 175-188 2013/09

    DOI: 10.1109/JSAC.2013.SUP.0513016  

    ISSN: 0733-8716

    eISSN: 1558-0008

  341. THUP: A P2P Network Robust to Churn and DoS Attack Based on Bimodal Degree Distribution Peer-reviewed

    Katsuya Suto, Hiroki Nishiyama, Nei Kato, Takayuki Nakachi, Tatsuya Fujii, Atsushi Takahara

    IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS 31 (9) 247-256 2013/09

    DOI: 10.1109/JSAC.2013.SUP.0513022  

    ISSN: 0733-8716

    eISSN: 1558-0008

  342. On the Effect of Data Request Message Flooding in Dense Wireless Sensor Networks with a Mobile Sink Peer-reviewed

    Daisuke Takaishi, Hiroki Nishiyama, Nei Kato, Ryu Miura

    IEEE 78th Vehicular Technology Conference (VTC 2013 Fall) 2013/09

    DOI: 10.1109/VTCFall.2013.6692313  

  343. Toward Terminal-to-Terminal Communication Networks: A Hybrid MANET and DTN Approach Invited Peer-reviewed

    Yuichi Kawamoto, Hiroki Nishiyama, Nei Kato

    IEEE Workshop on Emerging Technologies and Trends for Public Safety Communications 2013 2013/09

    DOI: 10.1109/CAMAD.2013.6708122  

  344. Mesh Router Selection to Maximize System Throughput in Dense Wireless Mesh Networks Peer-reviewed

    Panu Avakul, Hiroki Nishiyama, Nei Kato, Yoshitaka Shimizu, Tomoaki Kumagai

    International Conference on High Performance Switching and Routing (HPSR 2013) 2013/07

    DOI: 10.1109/HPSR.2013.6602300  

  345. Cooperative QoS Control Scheme Based on Scheduling Information in FiWi Access Network Peer-reviewed

    Zubair Md. Fadlullah, Hiroki Nishiyama, Yuichi Kawamoto, Hirotaka Ujikawa, Ken-Ichi Suzuki, Naoto Yoshimoto

    IEEE TRANSACTIONS ON EMERGING TOPICS IN COMPUTING 1 (2) 375-383 2013/07

    DOI: 10.1109/TETC.2013.2278699  

    ISSN: 2168-6750

  346. Throughput Capacity of MANETs with Power Control and Packet Redundancy Peer-reviewed

    Jiajia Liu, Xiaohong Jiang, Hiroki Nishiyama, Nei Kato

    IEEE Transactions on Wireless Communications 2013/06

    DOI: 10.1109/TWC.2013.042413.121683  

  347. An Efficient Data Transfer Method for Distributed Storage System over Satellite Networks Peer-reviewed

    Katsuya Suto, Panu Avakul, Hiroki Nishiyama, Nei Kato

    IEEE 77th Vehicular Technology Conference (VTC2013 Spring) 2013/06

    DOI: 10.1109/VTCSpring.2013.6691869  

  348. Throughput Analysis for Two-Hop Relay Mobile Ad Hoc Networks with Receiver Probing Peer-reviewed

    Jiajia Liu, Xiaohong Jiang, Hiroki Nishiyama, Nei Kato

    IEEE International Conference on Communications (ICC) 2013/06

    DOI: 10.1109/ICC.2013.6655577  

  349. On the Effect of Cooperation Between Power Saving Mechanisms in WLANs and PONs Peer-reviewed

    Ko Togashi, Hiroki Nishiyama, Nei Kato, Hirotaka Ujikawa, Ken-Ichi Suzuki, Naoto Yoshimoto

    IEEE International Conference on Communications (ICC) 2013/06

    DOI: 10.1109/ICC.2013.6655603  

  350. Performance Modeling for Relay Cooperation in Delay Tolerant Networks Peer-reviewed

    Jiajia Liu, Xiaohong Jiang, Hiroki Nishiyama, Nei Kato

    MOBILE NETWORKS & APPLICATIONS 18 (2) 186-194 2013/04

    DOI: 10.1007/s11036-012-0357-3  

    ISSN: 1383-469X

  351. On the Delivery Probability of Two-Hop Relay MANETs with Erasure Coding Peer-reviewed

    Jiajia Liu, Xiaohong Jiang, Hiroki Nishiyama, Nei Kato

    IEEE TRANSACTIONS ON COMMUNICATIONS 61 (4) 1314-1326 2013/04

    DOI: 10.1109/TCOMM.2013.020413.120198  

    ISSN: 0090-6778

  352. A Novel Game-based Demand Side Management Scheme for Smart Grid Peer-reviewed

    Zubair. M. Fadlullah, Minh. Q. Duong, Nei Kato, Ivan Stojmenovic

    IEEE Wireless Communications and Networking Conference (WCNC 2013) 2013/04

    DOI: 10.1109/WCNC.2013.6555332  

  353. Smart FiWi Networks: Challenges and Solutions for QoS and Green Communications Peer-reviewed

    Zubair Md. Fadlullah, Hiroki Nishiyama, Nei Kato, Hirotaka Ujikawa, Kenichi Suzuki, Naoto Yoshimoto

    IEEE Intelligent Systems 2013/03

    DOI: 10.1109/MIS.2013.46  

  354. Toward Optimized Traffic Distribution for Efficient Network Capacity Utilization in Two-Layered Satellite Networks Peer-reviewed

    Hiroki Nishiyama, Yuta Tada, Nei Kato, Naoko Yoshimura, Morio Toyoshima, Naoto Kadowaki

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 62 (3) 1303-1313 2013/03

    DOI: 10.1109/TVT.2012.2227861  

    ISSN: 0018-9545

  355. Cluster-Based Certificate Revocation with Vindication Capability for Mobile Ad Hoc Networks Peer-reviewed

    Wei Liu, Hiroki Nishiyama, Nirwan Ansari, Jie Yang, Nei Kato

    IEEE TRANSACTIONS ON PARALLEL AND DISTRIBUTED SYSTEMS 24 (2) 239-249 2013/02

    DOI: 10.1109/TPDS.2012.85  

    ISSN: 1045-9219

  356. Fairness Issue in Message Delivery in Delay- and Disruption-Tolerant Networks for Disaster Areas Peer-reviewed

    Asato Takahashi, Hiroki Nishiyama, Nei Kato

    International Conference on Computing, Networking and Communications (ICNC 2013) 2013/01

    DOI: 10.1109/ICCNC.2013.6504207  

  357. On the Throughput Evaluation of Wireless Mesh Network Deployed in Disaster Areas Peer-reviewed

    Thuan Ngo, Hiroki Nishiyama, Nei Kato, Yoshitaka Shimizu, Kohei Mizuno, Tomoaki Kumagai

    International Conference on Computing, Networking and Communications (ICNC 2013) 2013/01

    DOI: 10.1109/ICCNC.2013.6504119  

  358. On the Optimal Transmission Distance for Power-aware Routing in Ad hoc Networks Peer-reviewed

    Ahmed E.A.A. Abdulla, Zubair Md. Fadlullah, Hiroki Nishiyama, Nei Kato

    International Conference on Computing, Networking and Communications, Wireless Ad Hoc and Sensor Networks Symposium (ICNC 2013 - WAHS) 2013/01

    DOI: 10.1109/ICCNC.2013.6504139  

  359. Performance modeling of three-hop relay routing in Intermittently Connected Mobile Networks Peer-reviewed

    Jiajia Liu, Hiroki Nishiyama, Nei Kato

    IEEE Wireless Communications and Networking Conference, WCNC 2108-2112 2013

    DOI: 10.1109/WCNC.2013.6554888  

    ISSN: 1525-3511

  360. Intrusion detection system (IDS) for combating attacks against cognitive radio networks Peer-reviewed

    Zubair Md. Fadlullah, Hiroki Nishiyama, Nei Kato, Mostafa M. Fouda

    IEEE Network 27 (3) 51-56 2013

    DOI: 10.1109/MNET.2013.6523809  

    ISSN: 0890-8044

  361. Packet transfer delay minimization by network-wide equalization of unbalanced traffic load in Multi-Layered satellite networks Peer-reviewed

    Yuichi Kawamoto, Hiroki Nishiyama, Nei Kato, Naoko Yoshimura, Naoto Kadowaki

    IEEE Vehicular Technology Conference 2013

    DOI: 10.1109/VTCSpring.2013.6692690  

    ISSN: 1550-2252

  362. Disaster-resilient networking: A new vision based on movable and deployable resource units Peer-reviewed

    Toshikazu Sakano, Zubair Fadlullah, Thuan Ngo, Hiroki Nishiyama, Masataka Nakazawa, Fumiyuki Adachi, Nei Kato, Atsushi Takahara, Tomoaki Kumagai, Hiromichi Kasahara, Shigeki Kurihara

    IEEE Network 27 (4) 40-46 2013

    DOI: 10.1109/MNET.2013.6574664  

    ISSN: 0890-8044

  363. A divide and conquer approach for efficient bandwidth allocation in next generation satellite-routed sensor system (SRSS) Peer-reviewed

    Yuichi Kawamoto, Hiroki Nishiyama, Nei Kato, Shinichi Yamamoto, Naoko Yoshimura, Naoto Kadowaki

    2013 9th International Wireless Communications and Mobile Computing Conference, IWCMC 2013 741-745 2013

    DOI: 10.1109/IWCMC.2013.6583649  

  364. Characterizing the impact of non-uniform deployment of APs on network performance under partially overlapped channels Peer-reviewed

    Wei Zhao, Zubair Md. Fadlullah, Hiroki Nishiyama, Nei Kato

    Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 7992 244-254 2013

    DOI: 10.1007/978-3-642-39701-1_21  

    ISSN: 0302-9743 1611-3349

  365. A framework for information propagation in mobile sensor networks Peer-reviewed

    Jiajia Liu, Hiroki Nishiyama, Nei Kato

    Proceedings - IEEE 10th International Conference on Mobile Ad-Hoc and Sensor Systems, MASS 2013 214-221 2013

    DOI: 10.1109/MASS.2013.9  

  366. An intelligent routing scheme effectively utilizing mass storage embedded on satellites to mitigate network congestions Peer-reviewed

    Kazuma Kaneko, Yuuichi Kawamoto, Hiroki Nishiyama, Nei Kato, Shinichi Yamamoto, Naoko Yoshimura

    MSWiM 2013 - Proceedings of the 16th ACM International Conference on Modeling, Analysis and Simulation of Wireless and Mobile Systems 167-171 2013

    DOI: 10.1145/2507924.2507951  

  367. Optimal Forwarding Games in Mobile Ad Hoc Networks with Two-Hop f-cast Relay Peer-reviewed

    Jiajia Liu, Xiaohong Jiang, Hiroki Nishiyama, Ryu Miura, Nei Kato, Naoto Kadowaki

    IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS 30 (11) 2169-2179 2012/12

    DOI: 10.1109/JSAC.2012.121209  

    ISSN: 0733-8716

  368. Generalized Two-Hop Relay for Flexible Delay Control in MANETs Peer-reviewed

    Jiajia Liu, Xiaohong Jiang, Hiroki Nishiyama, Nei Kato

    IEEE-ACM TRANSACTIONS ON NETWORKING 20 (6) 1950-1963 2012/12

    DOI: 10.1109/TNET.2012.2187923  

    ISSN: 1063-6692

  369. Throughput Capacity of the Group-Based Two-Hop Relay Algorithm in MANETs Peer-reviewed

    Jiajia Liu, Xiaohong Jiang, Hiroki Nishiyama, Nei Kato

    IEEE Global Communications Conference (Globecom 2012) 2012/12

    DOI: 10.1109/GLOCOM.2012.6503085  

  370. A Novel Demand Control Policy for Improving Quality of Power Usage in Smart Grid Peer-reviewed

    Mostafa M. Fouda, Zubair Md. Fadlullah, Nei Kato, Akira Takeuchi, Yousuke Nozaki

    IEEE Global Communications Conference (Globecom 2012) 2012/12

    DOI: 10.1109/GLOCOM.2012.6503938  

  371. Benefit of Selecting Number of Active Mesh Router in Disaster Orienred Wireless Mesh Network Peer-reviewed

    Panu Avakul, Hiroki Nishiyama, Nei Kato, Yoshitaka Shimizu, Tomoaki Kumagai

    International Conference on Computer Science and Software Engineering (CCSE 2012) 2012/12

  372. Capacity and Delay of Probing-Based Two-Hop Relay in MANETs Peer-reviewed

    Jiajia Liu, Juntao Gao, Xiaohong Jiang, Hiroki Nishiyama, Nei Kato

    IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS 11 (11) 4172-4183 2012/11

    DOI: 10.1109/TWC.2012.091812.120346  

    ISSN: 1536-1276

  373. A Novel P2P VoD Streaming Technique Integrating Localization and Congestion Awareness Strategies Peer-reviewed

    Mostafa M. Fouda, Zubair Md. Fadlullah, Mohsen Guizani, Nei Kato

    MOBILE NETWORKS & APPLICATIONS 17 (5) 594-603 2012/10

    DOI: 10.1007/s11036-011-0342-2  

    ISSN: 1383-469X

  374. On Real-Time Data Gathering in Next Generation Satellite-Routed Sensor System (SRSS) Peer-reviewed

    Yuichi Kawamoto, Hiroki Nishiyama, Nei Kato, Shinichi Yamamoto, Naoko Yoshimura, Naoto Kadowaki

    2012 International Conference on Wireless Communications and Signal Processing (WCSP 2012) 2012/10

    DOI: 10.1109/WCSP.2012.6542956  

  375. A Bandwidth Allocation Method to Improve User QoS Satisfaction Without Decreasing System Throughput in Wireless Access Networks Peer-reviewed

    Kenta Suzuki, Hiroki Nishiyama, Nei Kato, Hirotaka Ujikawa, Ken-Ichi Suzuki, Naoto Yoshimoto

    23rd IEEE International Symposium on Personal, Indoor and Mobile Radio Communication (PIMRC 2012) 2012/09

    DOI: 10.1109/PIMRC.2012.6362572  

  376. A Novel Gateway Selection Method to Maximize the System Throughput of Wireless Mesh Network Deployed in Disaster Areas Peer-reviewed

    Wei Liu, Hiroki Nishiyama, Nei Kato, Yoshitaka Shimizu, Tomoaki Kumagai

    23rd IEEE International Symposium on Personal, Indoor and Mobile Radio Communication (PIMRC 2012) 2012/09

    DOI: 10.1109/PIMRC.2012.6362887  

  377. Protocol Optimization for Integrated Heterogeneous Networks in Disaster Areas Peer-reviewed

    Yuichi Kawamoto, Hiroki Nishiyama, Nei Kato

    The 15th International Symposium on Wireless Personal Multimedia Communications 2012 (WPMC 2012) 2012/09

  378. Towards Throughput Optimization of Wireless Mesh Networks in Disaster Areas Peer-reviewed

    Wei Liu, Hiroki Nishiyama, Nei Kato

    The 15th International Symposium on Wireless Personal Multimedia Communications 2012 (WPMC 2012) 2012/09

  379. Traffic Distribution to Mitigate Downlink Congestion in Two-Layered Satellite Networks Peer-reviewed

    Kazuma Yoshida, Hiroki Nishiyama, Nei Kato, Naoko Yoshimura, Morio Toyoshima, Naoto Kadowaki

    IEEE International Conference on Network Infrastructure and Digital Content (IC-NIDC 2012) 2012/09

    DOI: 10.1109/ICNIDC.2012.6418773  

  380. A Highly Efficient DAMA Algorithm for Making Maximum Use of both Satellite Transponder Bandwidth and Transmission Power Peer-reviewed

    Katsuya Nakahira, Takatoshi Sugiyama, Hiroki Nishiyama, Nei Kato

    IEICE TRANSACTIONS ON COMMUNICATIONS E95B (8) 2619-2630 2012/08

    DOI: 10.1587/transcom.E95.B.2619  

    ISSN: 0916-8516

    eISSN: 1745-1345

  381. Designing P2P Networks Tolerant to Attacks and Faults Based on Bimodal Degree Distribution Peer-reviewed

    Katsuya Suto, Hiroki Nishiyama, Sherman Shen, Nei Kato

    Journal of Communications, SI on Security and Privacy in Communication Systems and Networks 2012/08

  382. Message Delivery Probability of Two-Hop Relay with Erasure Coding in MANETs Peer-reviewed

    Jiajia Liu, Xiaohong Jiang, Hiroki Nishiyama, Nei Kato

    7th International ICST Conference on Communications and Networking in China (CHINACOM 2012) 2012/08

    DOI: 10.1109/ChinaCom.2012.6417465  

  383. HYMN: A Novel Hybrid Multi-Hop Routing Algorithm to Improve the Longevity of WSNs Peer-reviewed

    Ahmed E. A. A. Abdulla, Hiroki Nishiyama, Jie Yang, Nirwan Ansari, Nei Kato

    IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS 11 (7) 2531-2541 2012/07

    DOI: 10.1109/TWC.2012.050112.111222  

    ISSN: 1536-1276

    eISSN: 1558-2248

  384. Delivery Ratio in Two-Hop Relay MANETs with Limited Message Lifetime and Redundancy Peer-reviewed

    Jiajia Liu, Xiaohong Jiang, Hiroki Nishiyama, Nei Kato

    IEEE International Conference on Communications (ICC 2012) 2012/06

    DOI: 10.1109/ICC.2012.6364180  

  385. Capacity vs. Delivery Delay in MANETs with Power Control and f-cast Relay Peer-reviewed

    Jiajia Liu, Xiaohong Jiang, Hiroki Nishiyama, Nei Kato

    IEEE International Conference on Communications (ICC 2012) 2012/06

    DOI: 10.1109/ICC.2012.6363824  

  386. Assessing Packet Delivery Delay in Multi-Layered Satellite Networks Peer-reviewed

    Yuichi Kawamoto, Hiroki Nishiyama, Nei Kato, Naoko Yoshimura, Naoto Kadowaki

    The IEEE Wireless Communications and Networking Conference (ICC 2012) 2012/06

    DOI: 10.1109/ICC.2012.6363805  

  387. Dynamic Topology Update Mechanism in Local Tree-based Reliable Topology (LTRT) based MANETs Peer-reviewed

    Atsushi Yoshinari, Hiroki Nishiyama, Nei Kato, Dan Keun Sung

    IEEE International Conference on Communications (ICC 2012) 2012/06

    DOI: 10.1109/ICC.2012.6363803  

  388. A Game Theoretic Approach to Integrate Security with Quality of Service Peer-reviewed

    Zubair Md. Fadlullah, Athanasios V. Vasilakos, Nei Kato

    IEEE International Conference on Communications (ICC 2012) 2012/06

    DOI: 10.1109/ICC.2012.6364011  

  389. Probing-Based Two-Hop Relay with Limited Packet Redundancy Peer-reviewed

    Jiajia Liu, Juntao Gao, Xiaohong Jiang, Hiroki Nishiyama, Nei Kato

    13th IEEE Conference on High Performance Switching and Routing (HPSR 2012) 2012/06

    DOI: 10.1109/HPSR.2012.6260834  

  390. Toward Secure Targeted Broadcast in Smart Grid Peer-reviewed

    Zubair Md. Fadlullah, Nei Kato, Rongxing Lu, Xuemin (Sherman) Shen, Yousuke Nozaki

    IEEE Communications Magazine 2012/05

    DOI: 10.1109/MCOM.2012.6194396  

  391. Extending the lifetime of wireless sensor networks: A hybrid routing algorithm Peer-reviewed

    Ahmed E. A. A. Abdulla, Hiroki Nishiyama, Nei Kato

    COMPUTER COMMUNICATIONS 35 (9) 1056-1063 2012/05

    DOI: 10.1016/j.comcom.2011.10.001  

    ISSN: 0140-3664

    eISSN: 1873-703X

  392. A Method to Construct an Attack and Fault Tolerant Scalable Distributed Network Peer-reviewed

    Katsuya Suto, Hiroki Nishiyama, Nei Kato, Kohei Shiomoto, Hideaki Yoshino, Keisuke Ishibashi

    4th International Conference on Communications, Mobility, and Computing (CMC 2012) 2012/05

  393. End-to-End Delay in Mobile Ad Hoc Networks with Generalized Transmission Range and Limited Packet Redundancy Peer-reviewed

    Jiajia Liu, Xiaohong Jiang, Hiroki Nishiyama, Nei Kato, Xuemin (Sherman) Shen

    IEEE Wireless Communications and Networking Conference (WCNC 2012) 2012/04

    DOI: 10.1109/WCNC.2012.6214063  

  394. A Delay-Based Traffic Distribution Technique for Multi-Layered Satellite Networks Peer-reviewed

    Yuichi Kawamoto, Hiroki Nishiyama, Nei Kato, Naoko Yoshimura, Naoto Kadowaki

    IEEE Wireless Communications and Networking Conference (WCNC 2012) 2012/04

    DOI: 10.1109/WCNC.2012.6214198  

  395. Optimal Rate Selection Scheme in a Two-hop Relay Network Adopting Chase Combining HARQ in Rayleigh Block-fading Channels Peer-reviewed

    Seong Hwan Kim, Seung Joon Lee, Dan Keun Sung, Hiroki Nishiyama, Nei Kato

    IEEE Wireless Communications and Networking Conference (WCNC 2012) 2012/04

    DOI: 10.1109/WCNC.2012.6214030  

  396. Multicast Capacity, Delay and Delay Jitter in Intermittently Connected Mobile Networks Peer-reviewed

    Jiajia Liu, Xiaohong jiang, Hiroki Nishiyama, Nei Kato

    The 31st IEEE International Conference on Computer Communications (INFOCOM'2012) 2012/03

    DOI: 10.1109/INFCOM.2012.6195648  

  397. On Minimizing the Impact of Mobility on Topology Control in Mobile Ad Hoc Networks Peer-reviewed

    Hiroki Nishiyama, Thuan Ngo, Nirwan Ansari, Nei Kato

    IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS 11 (3) 1158-1166 2012/03

    DOI: 10.1109/TWC.2012.010312.110783  

    ISSN: 1536-1276

  398. Exact Throughput Capacity under Power Control in Mobile Ad Hoc Networks Peer-reviewed

    Jiajia Liu, Xiaohong Jiang, Hiroki Nishiyama, Nei Kato

    31st IEEE International Conference on Computer Communications (INFOCOM 2012) 2012/03

    DOI: 10.1109/INFCOM.2012.6195580  

  399. A Cooperative User-System Approach for Optimizing Performance in Content Distribution/Delivery Networks Peer-reviewed

    Hiroki Nishiyama, Hiroshi Yamada, Hideaki Yoshino, Nei Kato

    IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS 30 (2) 476-483 2012/02

    DOI: 10.1109/JSAC.2012.120228  

    ISSN: 0733-8716

  400. On the Partially Overlapped Channel Assignment on Wireless Mesh Network Backbone: A Game Theoretic Approach Peer-reviewed

    Pedro B. F. Duarte, Zubair Md Fadlullah, Athanasios V. Vasilakos, Nei Kato

    IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS 30 (1) 119-127 2012/01

    DOI: 10.1109/JSAC.2012.120111  

    ISSN: 0733-8716

  401. On Load Distribution over Multipath Networks Peer-reviewed

    Sumet Prabhavat, Hiroki Nishiyama, Nirwan Ansari, Nei Kato

    IEEE COMMUNICATIONS SURVEYS AND TUTORIALS 14 (3) 662-680 2012

    DOI: 10.1109/SURV.2011.082511.00013  

    ISSN: 1553-877X

  402. A novel heuristic-based traffic distribution method for disaster zone wireless mesh networks Peer-reviewed

    Mostafa M. Fouda, Hiroki Nishiyama, Nei Kato

    2012 1st IEEE International Conference on Communications in China, ICCC 2012 179-184 2012

    DOI: 10.1109/ICCChina.2012.6356874  

  403. Performance Modeling for Two-hop Relay with Erasure Coding in MANETs Peer-reviewed

    Jiajia Liu, Xiaohong jiang, Hiroki Nishiyama, Nei Kato

    IEEE global communications conference 2011 (Globecom) 2011/12

    DOI: 10.1109/GLOCOM.2011.6133595  

  404. Robust and Efficient Stream Delivery for Application Layer Multicasting in Heterogeneous Netwroks Peer-reviewed

    Nei Kato

    2nd Workshop on Multimedia Communications & Services(MCS) IEEE GLOBECOM 2011 (Key Notes) 2011/12

  405. A Lightweight Message Authentication Scheme for Smart Grid Communications Peer-reviewed

    Mostafa M. Fouda, Zubair Md Fadlullah, Nei Kato, Rongxing Lu, Xuemin (Sherman) Shen

    IEEE TRANSACTIONS ON SMART GRID 2 (4) 675-685 2011/12

    DOI: 10.1109/TSG.2011.2160661  

    ISSN: 1949-3053

  406. A Novel Multichannel Streaming Scheme to Reduce Channel Switching Delay in Application Layer Multicast Peer-reviewed

    Toshiaki Ako, Hiroki Nishiyama, Nirwan Ansari, Nei Kato

    IEEE SYSTEMS JOURNAL 5 (4) 545-554 2011/12

    DOI: 10.1109/JSYST.2011.2165611  

    ISSN: 1932-8184

    eISSN: 1937-9234

  407. Load Balancing and QoS Provisioning Based on Congestion Prediction for GEO/LEO Hybrid Satellite Networks Invited Peer-reviewed

    Hiroki Nishiyama, Daigo Kudoh, Nei Kato, Naoto Kadowaki

    PROCEEDINGS OF THE IEEE 99 (11) 1998-2007 2011/11

    DOI: 10.1109/JPROC.2011.2157885  

    ISSN: 0018-9219

  408. A clique-based secure admission control scheme for mobile ad hoc networks (MANETs) Peer-reviewed

    Qing Chen, Zubair Md Fadlullah, Xiaodong Lin, Nei Kato

    JOURNAL OF NETWORK AND COMPUTER APPLICATIONS 34 (6) 1827-1835 2011/11

    DOI: 10.1016/j.jnca.2010.12.012  

    ISSN: 1084-8045

  409. Effective Delay-Controlled Load Distribution over Multipath Networks Peer-reviewed

    Sumet Prabhavat, Hiroki Nishiyama, Nirwan Ansari, Nei Kato

    IEEE TRANSACTIONS ON PARALLEL AND DISTRIBUTED SYSTEMS 22 (10) 1730-1741 2011/10

    DOI: 10.1109/TPDS.2011.43  

    ISSN: 1045-9219

    eISSN: 1558-2183

  410. A Novel Scheme for WSAN Sink Mobility Based on Clustering and Set Packing Techniques Peer-reviewed

    Hidehisa Nakayama, Zubair Md. Fadlullah, Nirwan Ansari, Nei Kato

    IEEE TRANSACTIONS ON AUTOMATIC CONTROL 56 (10) 2381-2389 2011/10

    DOI: 10.1109/TAC.2011.2163872  

    ISSN: 0018-9286

  411. An Early Warning System Against Malicious Activities for Smart Grid Communications Peer-reviewed

    Zubair Md. Fadlullah, Mostafa M. Fouda, Xuemin (Sherman) Shen, Yousuke Nozaki, Nei Kato

    IEEE Network Magazine 2011/09

    DOI: 10.1109/MNET.2011.6033036  

  412. A General Model for Store-carry-forward Routing Schemes with Multicast in Delay Tolerant Networks Invited Peer-reviewed

    Jiajia Liu, Xiaohong Jiang, Hiroki Nishiyama, Nei Kato

    The 6th International ICST Conference on Communications and Networking in China (CHINACOM 2011) 2011/08

    DOI: 10.1109/ChinaCom.2011.6158204  

  413. Modeling Load Distribution for Efficient Route Control Methods in Multi-Layered Satellite Networks Peer-reviewed

    Yuta Tada, Hiroki Nishiyama, Nei Kato

    2011 Tohoku-Section Joint Convention of Institutes of Electrical and Information Engineers 2011/08

  414. 衛星通信におけるレイヤ3ダイバシティシステムの利用に関する一考察 Peer-reviewed

    Tadao Mizutani, Hiroki Nishiyama, Katuya Nakahira, Nei Kato

    電子情報通信学会技術研究報告 2011/08

  415. Delay and Capacity in Ad Hoc Mobile Networks with f-cast Relay Algorithms Peer-reviewed

    Jiajia Liu, Xiaohong Jiang, Hiroki Nishiyama, Nei Kato

    IEEE Transactions on Wireless Communications 2011/08

    DOI: 10.1109/TWC.2011.062111.101976  

  416. Reliability Assessment for Wireless Mesh Networks Under Probabilistic Region Failure Model Peer-reviewed

    Jiajia Liu, Xiaohong Jiang, Hiroki Nishiyama, Nei Kato

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 60 (5) 2253-2264 2011/06

    DOI: 10.1109/TVT.2011.2114684  

    ISSN: 0018-9545

    eISSN: 1939-9359

  417. 階層型衛星ネットワークの構成と通信遅延の関係に関する一考察 Peer-reviewed

    Yuichi Kawamoto, Hiroki Nishiyama, Naoko Yoshimura, Nei Kato

    電子情報通信学会技術研究報告 2011/05

  418. Towards Intelligent Machine-to-Machine Communications in Smart Grid Peer-reviewed

    Zubair Md. Fadlullah, Mostafa Fouda, Nei Kato, Akira Takeuchi, Noboru Iwasaki, Yousuke Nozaki

    IEEE Communications Magazine 2011/04

    DOI: 10.1109/MCOM.2011.5741147  

  419. HYMN to Improve the Scalability of Wireless Sensor Networks Peer-reviewed

    Ahmed E.A.A. Abdulla, Hiroki Nishiyama, Nirwan Ansari, Nei Kato

    30th IEEE International Conference on Computer Communications (INFOCOM'11), The Third International Workshop on Wireless Sensor, Actuator and Robot Networks (WiSARN) 2011/04

  420. Towards a Light-weight Message Authentication Mechanism Tailored for Smart Grid Communications Peer-reviewed

    Mostafa M. Fouda, Zubair Md. Fadlullah, Nei Kato, Rongxing Lu, Sherman Shen

    30th IEEE International Conference on Computer Communications (INFOCOM'11), Security in Computers, Networking and Communications (SCNC) Workshop 2011/04

  421. Channel Assignment on Wireless Mesh Network Backbone with Potential Game approach Peer-reviewed

    Pedro B, F. Duarte, Zubair Md. Fadlullah, Athanasios V. Vasilakos, Nei Kato

    2nd International ICST Conference on Game Theory for Networks (GameNets 2011) 2011/04

  422. On the Performance of Downstream Traffic Distribution Scheme in Fiber-Wireless Networks Peer-reviewed

    Masahiro Honda, Hiroki Nishiyama, Hiroto Nomura, Takeshi Yada, Hiroshi Yamada, Nei Kato

    IEEE Wireless Communications & Networking Conference (WCNC 2011) 2011/03

    DOI: 10.1109/WCNC.2011.5779172  

  423. Experiment of Satellite Communication Systems: Present State and Future Prospects Invited Peer-reviewed

    Nei Kato, Hiroshi Kazama, Hiroki Nishiyama

    IEICE Transactions on Communications 2011/03

  424. WINS搭載ATM交換機を利用したTCP通信の基礎実験 Peer-reviewed

    Hiroki Nishiyama, Naoko Yoshimura, Takashi Takahashi, Nei Kato

    2011 IEICE General Conference 2011/03

  425. コンテンツ配信ネットワークにおけるトラヒック間作用を考慮したサーバ選択法に関する一検討 Peer-reviewed

    Kai Furuya, Hiroki Nishiyama, Nei Kato, Hiroto Nomura, Takeshi Yada, Hiroshi Yamada

    2011 IEICE General Conference 2011/03

  426. マルチホップリレーネットワークにおけるユーザQoSを考慮した帯域割当法に関する一検討 Peer-reviewed

    Bowornun Chaloemchai, Hiroki Nishiyama, Nei Kato

    2011 IEICE General Conference 2011/03

  427. An Adaptive Media Access Control Mechanism for Cognitive Radio Peer-reviewed

    Isao Konno, Hiroki Nishiyama, Nei Kato

    IEICE Transactions on Communications 2011/02

  428. Designing P2P Networks Tolerant to Attacks and Faults Based on Bimodal Degree Distribution Peer-reviewed

    Katsuya Suto, Hiroki Nishiyama, Sherman Shen, Nei Kato

    Journal of Communications, SI on Security and Privacy in Communication Systems and Networks 2011

  429. 電子情報通信学会知識ベース第3群コンピュータネットワーク第4編トランスポートサービス第6章RTPとRTCP Peer-reviewed

    加藤寧, 西山大樹

    電子情報通信学会 2011

  430. Delay and Capacity in Ad Hoc Mobile Networks with f-cast Relay Algorithms Peer-reviewed

    Jiajia Liu, Xiaohong Jiang, Hiroki Nishiyama, Nei Kato

    IEEE International Conference on Communications (ICC 2011) 2011/01

    DOI: 10.1109/icc.2011.5962997  

  431. A Study on Certificate Revocation in Mobile Ad Hoc Networks Peer-reviewed

    Wei Liu, Hiroki Nishiyama, Nirwan Ansari, Nei Kato

    IEEE International Conference on Communications (ICC 2011) 2011/01

    DOI: 10.1109/icc.2011.5962925  

  432. Development of a WLAN based monitoring system for group activity measurement in real-time. Peer-reviewed

    Hiroshi Tsunoda, Hidehisa Nakayama, Kohei Ohta, Akihiro Suzuki, Hiroki Nishiyama 0001, Ryoichi Nagatomi, Kazuo Hashimoto, Yuji Waizumi, Glenn Mansfield Keeni, Yoshiaki Nemoto

    Journal of Communications and Networks 13 (2) 86-94 2011

    DOI: 10.1109/JCN.2011.6157407  

  433. Group-based two-hop relay with redundancy in MANETs Peer-reviewed

    Jiajia Liu, Xiaohong Jiang, Hiroki Nishiyama, Nei Kato

    2011 IEEE 12th International Conference on High Performance Switching and Routing, HPSR 2011 197-202 2011

    DOI: 10.1109/HPSR.2011.5986026  

  434. Performance modeling for two-hop relay with node selfishness in delay tolerant networks Peer-reviewed

    Jiajia Liu, Xiaohong Jiang, Hiroki Nishiyama, Nei Kato

    2011 IEEE Online Conference on Green Communications, GreenCom'11 70-75 2011

    DOI: 10.1109/GreenCom.2011.6082510  

  435. A survey of game theoretic approaches in smart grid Peer-reviewed

    Zubair Md. Fadlullah, Yousuke Nozaki, Akira Takeuchi, Nei Kato

    2011 International Conference on Wireless Communications and Signal Processing, WCSP 2011 2011

    DOI: 10.1109/WCSP.2011.6096962  

  436. DTRAB: Combating Against Attacks on Encrypted Protocols Through Traffic-Feature Analysis Peer-reviewed

    Zubair M. Fadlullah, Tarik Taleb, Athanasios V. Vasilakos, Mohsen Guizani, Nei Kato

    IEEE-ACM TRANSACTIONS ON NETWORKING 18 (4) 1234-1247 2010/08

    DOI: 10.1109/TNET.2009.2039492  

    ISSN: 1063-6692

  437. Experiment of Satellite Communication Systems: Present State and Future Prospects Peer-reviewed

    Nei Kato, Hiroshi Kazama, Hiroki Nishiyama

    IEICE Transactions on Communications 2010

  438. An Adaptive Media Access Control Mechanism for Cognitive Radio Peer-reviewed

    Isao Konno, Hiroki Nishiyama, Nei Kato

    IEICE Transactions on Communications 2010

  439. Probabilistic Packet Marking-based TCP Rate Control for Fair Bandwidth Sharing in 10G-EPON Peer-reviewed

    Hiroki Nishiyama, Zubair Md. Fadlullah, Nei Kato

    IEEE system journal 2010

    DOI: 10.1109/JSYST.2010.2082230  

  440. 気軽に運動ができる町仙台を目指して Peer-reviewed

    永富 良一, 加藤 寧, 橋本 和夫

    第3回横幹連合コンファレンス 2009/12

  441. Bandwidth Aggregation-Aware Dynamic QoS Negotiation for Real-Time Video Streaming in Next-Generation Wireless Networks Peer-reviewed

    Juan Carlos Fernandez, Tarik Taleb, Mohsen Guizani, Nei Kato

    IEEE TRANSACTIONS ON MULTIMEDIA 11 (6) 1082-1093 2009/10

    DOI: 10.1109/TMM.2009.2026086  

    ISSN: 1520-9210

  442. An Effective Access Control Mechanism for Cognitive Radio Peer-reviewed

    Isao Konno, Hiroki Nishiyama, Nei Kato

    Forum on Information Technology 2009 (FIT), Vol. 4, No. RM-008 2009/09

  443. 無線センサネットワークにおけるデータ収集法に関する一検討 Peer-reviewed

    Tetsushi Fukabori, Hidehisa Nakayama, Hiroki Nishiyama, Nei Kato

    Forum on Information Technology 2009 (FIT) 2009/09

  444. 背景領域細線化を用いた手書き文字切出しの改良手法 Peer-reviewed

    Hidehisa Nakayama, Yuta Fujiwara, Nei Kato

    Forum on Information Technology 2009 (FIT) 2009/09

  445. アドホックネットワークのブロードキャストにおける高信頼プロトコルに関する検討 Peer-reviewed

    Kenji Miyao, Hidehisa Nakayama, Nei Kato

    Forum on Information Technology 2009 (FIT) 2009/09

  446. A Dynamic Anomaly Detection Scheme for AODV-Based Mobile Ad Hoc Networks Peer-reviewed

    Hidehisa Nakayama, Satoshi Kurosawa, Abbas Jamalipour, Yoshiaki Nemoto, Nei Kato

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 58 (5) 2471-2481 2009/06

    DOI: 10.1109/TVT.2008.2010049  

    ISSN: 0018-9545

    eISSN: 1939-9359

  447. SAGE: A Strong Privacy-Preserving Scheme Against Global Eavesdropping for eHealth Systems Peer-reviewed

    Xiaodong Lin, Rongxing Lu, Xuemin (Sherman) Shen, Yoshiaki Nemoto, Nei Kato

    IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS 27 (4) 365-378 2009/05

    DOI: 10.1109/JSAC.2009.090502  

    ISSN: 0733-8716

  448. DEMAPS: A Load-Transition-Based Mobility Management Scheme for an Efficient Selection of MAP in Mobile IPv6 Networks Peer-reviewed

    Tarik Taleb, Abbas Jamalipour, Yoshiaki Nemoto, Nei Kato

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 58 (2) 954-965 2009/02

    DOI: 10.1109/TVT.2008.927037  

    ISSN: 0018-9545

    eISSN: 1939-9359

  449. Multi-path video Streaming in wireless networks using time based scheduling Peer-reviewed

    Juan Carlos Fernandez, Nei Kato

    International Journal of Business Deta Communications and Networking 2009

  450. Countermeasure against Forgery of Search Results in Structured Overley Networks Peer-reviewed

    Sho Kato, Hidehisa Nakayama, Yoshiaki Nemoto, Nei Kato

    IEICE Trans. on Communications 2009

  451. Explicit Load Balancing Technique for NGEO Satellite IP Networks with On-Board Processing Capability Peer-reviewed

    Tarik Taleb, Daisuke Mashimo, Abbas Jamalipour, Kazuo Hashimoto, Nei Kato, Yoshiaki Nemoto

    IEEE Trans. on Networking 2009

    DOI: 10.1109/TNET.2008.918084  

  452. Robust and Efficient Stream Delivery for Application Layer Multimeda in Heterogeneous Networks Peer-reviewed

    Masahiro Kobayashi, Hidehisa Nakayama, Nirwan Ansari, Nei Kato

    IEEE Trans. on Multimedia 2009/01

    DOI: 10.1109/TMM.2008.2008933  

  453. A Cross-Layer Approach for an EfficientStream Delivery of TCP/RTP-based Multimedia Applications in Heterogeneous Wirelsss Netwoeks Peer-reviewed

    Tarik Taleb, Kenichi Kashibuchi, Alessandro Leonardi, Sergio Palazzo, Kazuo Hashimoto, Nei Kato, Yoshiaki Nemoto

    IEEE trans. onVehicular Technology 2008/11

    DOI: 10.1109/TVT.2008.918727  

  454. Congestion Prediction Based Load Balancing in IP/LEO Satellite Networks Peer-reviewed

    Daigo Kudo, Kenichi Kashibuchi, Nei Kato

    Technical Report of IEICE 2008/11

  455. A Secure and Robust Framework of Serve Level Specification for Next Generation Wireless Networks Peer-reviewed

    Juan Carlos Fernandez, Zubair Md. Fadlullah, Nei Kato

    Technical Report of IEICE 2008/10

  456. Group-based Distributed Public Key Management For Mobile Ad Hoc Networks Peer-reviewed

    Chen Qing, Nei Kato

    北京郵電大学東北大学ワークショップ Advanced ICT 2008/10

    DOI: 10.1109/MUE.2008.66  

  457. Deley-Minimized Laod Distribution for Multipath Networks Peer-reviewed

    Sumet Prabhavat, Hiroki Nishiyama, Nei Kato

    1st Student Organized International Mini-Conference on Information Electronics Systems 2008/10

  458. Fault-Tolerant Topology Control in Wireless Ad-Hoc Networks Peer-reviewed

    Kenji MIyao, Hidehisa Nakayama, Nei Kato

    IEICE 20th Tohoku Section Joint Convention 2008/08

  459. Improving the Efficient of DoS Traceback Based on the Enhanced ITrace-CP Method for Mobile Enviroment Invited Peer-reviewed

    Hiroshi Tsunoda, Taishi Tochiari, Yuji Waizumi, Yoshiaki Nemoto, Nei Kato

    CHIANA COM 2008 2008/08

    DOI: 10.1109/CHINACOM.2008.4685116  

  460. 背景領域の細線化と射影ヒストグラムを併用した手書き文字切り出しに関する一考察 Peer-reviewed

    藤原勇太, 中山英久, 加藤寧

    MIRU 2008 2008/07

  461. トレイタトレーシング技術における動的計画法を用いたマッチング方式に関する考察 Peer-reviewed

    Kazumasa Matsuda, Hidehisa Nakayama, Nei Kato

    Technical Report of IEICE 2008/07

  462. A Reliable Topology efficient Key Distribution in Ad-Hoc Networks Invited Peer-reviewed

    Kenji Miyao, Hidehisa Nakayama, Nirwan Ansari, Yoshiaki Nemoto, Nei Kato

    SPAWN 2008/06

    DOI: 10.1109/WOWMOM.2008.4594922  

  463. Load Distribution with Queuing Deley Bound over Multipath Networks Peer-reviewed

    Sumet Pravhavat, Hiroki Nishiyama, Nirwan Ansari, Yoshiaki Nemoto, Nei Kato

    ICSSC 2008 2008/06

  464. SA-OLSR: Security Aware Optimized Link State for Mobile Ad Hoc Networks Peer-reviewed

    Bounpadith Kannhavong, Hidehisa Nakayama, Nei Kato

    ICC 2008 2008/05

    DOI: 10.1109/ICC.2008.283  

  465. Network Application Identification Using Transition Pattern of payload Length Peer-reviewed

    Shinnosuke Yagi, Yuji Waizumi, Hiroshi Tsunoda, Abbas Jamlipour, Nei Kato

    WCNC 2008 2008/03

  466. LEO衛星IPネットワークにおける輻輳予測を用いたトラヒック制御 Peer-reviewed

    Daigo Kudo, Kenichi Kashibuchi, Nei Kato

    Technical Report of IEICE 2008/03

  467. Efficient and Reliable Topology Control Dissemination Algorithm for Wireless Ad Hoc Networks Peer-reviewed

    Kenji Miyao, Hidehisa Nakayama, Nirwan Ansari, Nei Kato

    Technical Report of IEICE 2008/03

  468. A Study of Definition of Traffic Pattern on Traitor Tracing Technology Peer-reviewed

    Kazumasa Matsuda, Hidehisa Nakayama, Masaru Dobashi, Nei Kato

    Technical Report of IEICE 2008/03

  469. センサネットワークにおけるモバイルシンクのモビリティに関する研究 Peer-reviewed

    Yutaro Sasaki, Hidehisa Nakayama, Nei Kato

    第5回先端的ネットワーク&コンピューティングテクノロジワークショップ 2008/03

  470. トレイタトレ-シング技術におけるバックグラウンドトラヒックの影響に関する考察 Peer-reviewed

    Kazumasa Matsuda, Hidehisa Nakayama, Masaru Dobashi, Nei Kato

    第5回先端的ネットワーキング&コンピューティングテクノロジワークショップ 2008/03

  471. P2P ネットワークに関する障害耐性に関する一考察 Peer-reviewed

    Kai Furuya, Hiroki Nishiyama, Nei Kato

    第6回先端的ネットワーク&コンピューティングテクノロジワークショップ 2008/02

  472. コグニティブ無線における効率的なアクセス制御方式に関する一検討 Peer-reviewed

    IsaoKonno, Hiroki Nishiyama, Nei Kato

    第6回先端的ネットワーク&コンピューティングテクノロジワークショップ 2008/02

  473. Performance Enhancement of TCP over Adaptive Multi-Rate IEEE 802.11 Wireless LANs Peer-reviewed

    Kenichi Kashibuchi, Tarik Taleb, Abbas Jamalipour, Yoshiak Nemoto, Nei Kato

    RWS 2008 2008/01

    DOI: 10.1109/RWS.2008.4463558  

  474. Channel occupancy time based TCP rate control for IEEE 802.11 DCF Peer-reviewed

    Kenichi Kashibuchi, Tarik Taleb, Yoshiaki Nemoto, Nei Kato

    IWCMC 2008 - International Wireless Communications and Mobile Computing Conference 932-937 2008

    DOI: 10.1109/IWCMC.2008.161  

  475. On Gateway Selection Protocol for DYMO-based MANET Peer-reviewed

    Takeshi Matsuda, Hidehisa Nakayama, Sherman Shen, Yoshiaki Nemoto, Nei Kato

    2008 4TH IEEE INTERNATIONAL CONFERENCE ON WIRELESS AND MOBILE COMPUTING, NETWORKING AND COMMUNICATIONS (WIMOB) 32-37 2008

    DOI: 10.1109/WiMob.2008.51  

    ISSN: 2160-4886

  476. A New Data Gathering Scheme Based on Set Cover Algorithm for Mobile Sinks in WSNs Peer-reviewed

    Yutaro Sasaki, Hidehisa Nakayama, Nirwan Ansari, Yoshiaki Nemoto, Nei Kato

    GLOBECOM 2008 - 2008 IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE 2008

    DOI: 10.1109/GLOCOM.2008.ECP.145  

    ISSN: 1930-529X

  477. A study of a routing attack in OLSR-based mobile ad hoc networks Peer-reviewed

    Bounpadith Kannhavong, Hidehisa Nakayama, Nei Kato, Abbas Jamalipour, Yoshiaki Nemoto

    INTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS 20 (11) 1245-1261 2007/11

    DOI: 10.1002/dac.870  

    ISSN: 1074-5351

  478. Detecting Blackhole Attack on AODV-based Ad Hoc Networks by Dynamic Leaning Method Peer-reviewed

    Satoshi Kurosawa, Hidehisa Nakayama, Nei Kato, Abbas Jamalipour, Yoshiaki Nemoto

    International Journal of Network Security 5 (3) 338-346 2007/11

  479. A Stable Routing Protocol to Support ITS Services in VANET Networks Peer-reviewed

    T.Taleb, E.Sakhaee, A.Jamalipour, K.Hashimoto, N.Kato, Y.Nemoto

    IEEE Trans. on Vehicular Technology 56 (6) 3337-3347 2007/11

    Publisher: Institute of Electrical and Electronics Engineers

    DOI: 10.1109/TVT.2007.906873  

    ISSN: 0018-9545

  480. A Fair and Lifetime-Maximum Routing Algorithm for Wireless Sensor Networks Peer-reviewed

    Do Van Giang, Tarik Taleb, Kazuo Hashimoto, Nei Kato, Yoshiaki Nemoto

    IEEE GLOBECOM 2007 2007/11

    DOI: 10.1109/GLOCOM.2007.114  

  481. NHAG: Network-aware Hierarchcal Arrangement Graph of Application Layer Multicast in Heterogeneous Networks Peer-reviewed

    M.Kobayashi, H.Nakayama, N.Ansari, N.Kato

    IEEE GLOBECOM 2007 2007/11

    DOI: 10.1109/GLOCOM.2007.382  

  482. A Bandwodth Aggregation-aware QoS Negotiation Mechanism for Next-Generation Wireless Networks Peer-reviewed

    T.Taleb, J.C.Fernandez, K.Hashimoto, Y.Nemoto, N.Kato

    IEEE GLOBECOM 2007 2007/11

    DOI: 10.1109/GLOCOM.2007.367  

  483. A survey of routing attacks in mobile ad hoc networks Peer-reviewed

    Bounpadith Kannhavong, Hidehisa Nakayama, Yoshiaki Nemoto, Nei Kato, Abbas Jamalipour

    IEEE Wireless Communications 14 (5) 85-91 2007/10

    DOI: 10.1109/MWC.2007.4396947  

    ISSN: 1536-1284

  484. On the Performance of Congestion Control Protocols in Lossy Wireless Networks Peer-reviewed

    H.Nishiyama, T.Taleb, N.Ansari, Y.Nemoto, N.Kato

    WRECOM 2007 2007/10

  485. Fault-resilient sensing in wireless sensor networks Peer-reviewed

    Hidehisa Nakayama, Nirwan Ansari, Abbas Jamalipour, Nei Kato

    COMPUTER COMMUNICATIONS 30 (11-12) 2375-2384 2007/09

    DOI: 10.1016/j.comcom.2007.04.023  

    ISSN: 0140-3664

    eISSN: 1873-703X

  486. Towards Efficient Service-lebel QoS Provisioning in Large-scale 802.11-based Networks Peer-reviewed

    T.Taleb, A.Nafaa, L.Murphy, K.Hashimoto, N.Kato, Y.Nemoto

    IEEE Network Magazine 2007/09

    DOI: 10.1109/MNET.2007.4305176  

  487. A Classifier of Similar Characters using Compound Mahalanobis Function based on Difference Subspace Peer-reviewed

    J.Hirayama, H.Nakayama, N.Kato

    ICDAR 2007 2007/09

    DOI: 10.1109/ICDAR.2007.4378746  

  488. Performance Evaluartion of SCTP with Adaptive Multistreaming over LEO Satellite Networks Peer-reviewed

    H.Tsunoda, N.Kato, A.Jamalipour, Y.Nemoto

    IWSSC 2007 2007/09

    DOI: 10.1109/IWSSC.2007.4409407  

  489. Tracing-back Attacks Against Encrypted Protocols Peer-reviewed

    T.Taleb, Z.Fadlullah, K.Hashimoto, T.Nemoto, N.Kato

    IWCMC 2007 2007/08

    DOI: 10.1145/1280940.1280966  

  490. On Data Gathering and Security in Wireless Sensor Networks Invited Peer-reviewed

    H.Nakayama, N.Ansari, A.Jamalipour, Y.Nemoto, N.Kato

    IEEE SARNOFF 2007 2007/05

    DOI: 10.1109/SARNOF.2007.4567337  

  491. Improving ELB in Multi-Hop Satellite Constellations with Short ISL Delays Peer-reviewed

    T.Takahashi, T.Taleb, K.Hashimoto, N.Kato

    AIAA ICSSC 2007 2007/04

  492. A Novel Scheme to Reduce Control Overhead and Increase Link Duration in Highly Mobile Ad Hoc Networks Peer-reviewed

    E.Sakhaee, T.Taleb, A.Jamalipor, N.Kato, Y.Nemoto

    IEEE WCNC 2007 2007/03

    DOI: 10.1109/WCNC.2007.726  

  493. Dynamic QoS Negotiation for Next-Generarion Wireless Communications System Peer-reviewed

    J.C.Fernandez, T.Taleb, N.Ansari, K.Hashimoto, Y.Nemoto, N.Kato

    IEEE WCNC 2007 2007/03

    DOI: 10.1109/WCNC.2007.595  

  494. Explicit Load Baalancing Technique for NGEO Satellite IP Networks with On-Board Processing Capability Peer-reviewed

    T.Taleb, D.Mashimo, A.Jamalipour, K.Hashimoto, N.Kato, Y.Nemoto

    IEEE Trans. on Networking 2007

  495. An Application-Driven Mobility Management Scheme for Hierarchical Mobile IPv6 Networks Peer-reviewed

    T.Taleb, Y.Ikeda, K.Hashimoto, Y.Nemoto, N.Kato

    IEEE ICC 2007 2007/01

    DOI: 10.1109/ICC.2007.60  

  496. Combating Attacks Against Encrypted Plotocol Peer-reviewed

    Z.Fadlullah, T.Taleb, N.Ansari, Y.Miyake, K.Hashimoto, Y.Nemoto, N.Kato

    IEEE ICC 2007 2007/01

  497. Enhancements of T-REFWA to mitigate link error-related degradations in hybrid wired/wireless networks Peer-reviewed

    Hiroki Nishiyama, Tarik Taleb, Yoshiaki Nemoto, Abbas Jamalipour, Nei Kato

    JOURNAL OF COMMUNICATIONS AND NETWORKS 8 (4) 391-400 2006/12

    ISSN: 1229-2370

  498. Traitor Tracing Technology of Streaming Contents Delivery using Traffic Pattern in Wired/Wireless Environments Peer-reviewed

    M.Dobashi, H.Nakayama, N.Kato, Y.Nemoto, A.Jamalipour

    IEEE GLOBECOM 2006 2006/11

    DOI: 10.1109/GLOCOM.2006.299  

  499. A Collusion Attack Against OLSR-based Mobile Ad Hoc Networks Peer-reviewed

    B.Kannhavong, H.Nakayama, N.Kato, A.Jamalipour, Y.Nemoto

    IEEE GLOBECOM 2006 2006/11

    DOI: 10.1109/GLOCOM.2006.262  

  500. Design Guidelines for a Global and Self-Managed Leo Satellite -Based Sensor Network Peer-reviewed

    T.Taleb, A.Jamalipour, F.N.Abdesselam, K.Hashimoto, N.Kato, Y.Nemoto

    IEEE GLOBECOM 2006 2006/11

    DOI: 10.1109/GLOCOM.2006.1013  

  501. ELB: An Explicit Load Balancing Routing Protocol for Multi-Hop NGEO Satellite Constellations Peer-reviewed

    T.Taleb, D.Mashimo. A.Jamalipour, K.Hashimoto, Y.Nemoto, N.Kato

    IEEE GLOBECOM 2006 2006/11

    DOI: 10.1109/GLOCOM.2006.523  

  502. AMulti-Level SecurityBased Autonomic Parameter Selection Approach for an Effective and Early Detection of Internet Worms Peer-reviewed

    K.Simkhada, T.Taleb, Y.Waizumi, A.Jamalipour, K.Hashimoto, N.Kato, Y.Namoto

    IEEE GLOBECOM 2006 2006/11

    DOI: 10.1109/GLOCOM.2006.302  

  503. Fast Convergent Layered Multicast in Fixed and Mobile Networks Peer-reviewed

    K.Kashibuchi, t.Taleb, Y.Nemoto, N.Kato

    WPMC 2006 2006/09

  504. Historical Hand-Written String Recognition by Non-Linear Discriminant Analysis using Kernel Feature Selection Peer-reviewed

    R.Inoue, H.Nakayama, N.Kato

    ICPR 2006 2006/08

    DOI: 10.1109/ICPR.2006.629  

  505. Prioritzation-based Layered Multicast for Fixed/Mobile Networks with Fast Convergebce and Iter-Session Fairness Peer-reviewed

    Kenichi kashibuchi, Tarik Taleb, Abbas Jamalipour, Yoshiaki Nemoto, Nei Kato

    Journal of Communications Software and Systems Vol. 2, No. 2 2006/06

  506. Analysis of the Node Isolation Attack against OLSR-based Mobile Ad Hoc Network Peer-reviewed

    B.Kannhavong, H.Nakayama, N.Kato, A.Jamalipour, Y.Nemoto

    ISCN 2006 2006/06

    DOI: 10.1109/ISCN.2006.1662504  

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    Best Student Paper Award

  507. Theatre in the Sky: A ubiquitous broadband multimedia-on-demand service over a novel constellation composed of quasi-geo stationary satellites Peer-reviewed

    T Taleb, A Jamalipour, N Kato, Y Nemoto

    INTERNATIONAL JOURNAL OF SATELLITE COMMUNICATIONS AND NETWORKING 24 (3) 215-227 2006/05

    DOI: 10.1002/sat.829  

    ISSN: 1542-0973

  508. RFWA: An Efficient and Fair Congestion Control Scheme for LEO Satellite Networks Peer-reviewed

    T. Taleb, N. Kato, Y. Nemoto

    IEEE/ACM Transactions on Networking 2006

    DOI: 10.1109/TNET.2006.883130  

  509. A New Smooth Handoff Scheme for Mobile Multimedia Streaming using RTP Dummy Packets and RTCP Explicit Handoff Notification Peer-reviewed

    K. Kashibuchi, T. Taleb, A. Jamalipour, Y. Nemoto, N. Kato

    WCNC 2006 2006

    DOI: 10.1109/WCNC.2005.1424852  

  510. An Efficient Vehicle-Heading Based Routing Protocol for VANET Networks Peer-reviewed

    T. Taleb, M. Ochi, A. Jamalipour, N. Kato, Y. Nemoto

    WCNC 2006 2006

  511. Aeronautical Ad Hoc Networks Peer-reviewed

    E. Sakhaee, A. Jamalipour, N. Kato

    WCNC 2006 2006

  512. Multipath Doppler Routing with QoS support in Pseudo-linear Highly Mobile Ad Hoc Networks Peer-reviewed

    E. Sakhaee, A. Jamalipour, N. Kato

    ICC 2006 2006

    DOI: 10.1109/ICC.2006.255625  

  513. An Efficient Sibnature-BAsed Approach for automatic Detection of Internet Worms over Large-Scale Networks Peer-reviewed

    K. Simkhada, T. Taleb, Y. Waizumi, A. Jamalipour, N. Kato, Y. Nemoto

    ICC 2006 2006

    DOI: 10.1109/ICC.2006.255123  

  514. A Fair TCP-Based Congestion Avoidance Approach for One-to-Many Private Networks Peer-reviewed

    T. Taleb, H. Nishiyama, A. Jamalipour, N. kato, Y. Nemoto

    ICC 2006 2006

    DOI: 10.1109/ICC.2006.255001  

  515. Geographical and Orbital Information Based Mobility Management to Overcome Last-Hop Ambiguity over IP/LEO Satellite Networks Peer-reviewed

    H. Tsunoda, K. Ohta, N. Kato, Y. Nemoto

    ICC 2006 2006

    DOI: 10.1109/ICC.2006.254989  

  516. IP Traffic Load Distribution in NGEO Broadband Satellite Networks Invited Peer-reviewed

    T. Taleb, A. Jamalipour, N. Kato, Y. Nemoto

    The 20th ISCIS 2005/11

    DOI: 10.1007/11569596_14  

  517. Securing Hybrid Wired/Mobile Networks from TCP-Flooding Based Denial-of-Service Attacks Peer-reviewed

    T. Taleb, H. Nishiyama, N. Kato, Y. Nemoto

    GLOBECOM 2005 2005/11

    DOI: 10.1109/GLOCOM.2005.1578290  

  518. A Dynamic and Efficient MAP Selection for Mobile IPv6 Networks Peer-reviewed

    T. Taleb, T. Suzuki, N. Kato, Y. Nemoto

    GLOBECOM 2005 2005/11

    DOI: 10.1109/GLOCOM.2005.1578287  

  519. Recent trends in IP/NGEO satellite communication systems: Transport, routing, and mobility management concerns Peer-reviewed

    Tarik Taleb, Nei Kato, Yoshiaki Nemoto

    IEEE Wireless Communications 12 (5) 63-69 2005/10

    DOI: 10.1109/MWC.2005.1522106  

    ISSN: 1536-1284

  520. A Global Video-on-Demand Architecture Based on a Novel Constellation Composed of Quasi-Geostationary Satellite Peer-reviewed

    T. Taleb, A. Jamalipour, N. Kato, Y. Nemoto

    The 7th IFIP 2005/09

  521. A Geographical Location Based Satellite Selection Scheme for a Novel Constellation Composed of Quasi-Geostationary Satellites Peer-reviewed

    U. Dhamaratna, T. Tareb, N. Kato, Y. Nemoto

    IEEE, ICC 2005 2005/05

  522. A Dummy Segmet Based Bandwidth Probing Technique to Enhance the Performance of TCP over Heterogenerous Networks Peer-reviewed

    T. Taleb, K. Kashibuchi, N. Kato, Y. Nemoto

    IEEE, WCNC 2005 2005/05

    DOI: 10.1109/WCNC.2005.1424890  

  523. REFWA Plus: Enhancement of REFWA to Combat Link Errors in LEO Satellite Networks Peer-reviewed

    T. Taleb, N. Kato, Y. Nemoto

    2005 IEEE HPSR 2005/05

  524. A Discriminant Method of Similar Characters with Nonlinear Compound Discriminant Function Peer-reviewed

    H. Suzuki, Y. Waizumi, N. Kato, Y. Nemoto

    The IEICE Transaction and System Vol.J88-D-2 (No.4) 704-715 2005/04

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0915-1923

  525. On-Demand Media Streaming to Hybrid Wired/Wireless Network Quasi-Geo Stationary Satellite Systems Peer-reviewed

    T. Taleb, N. Kato, Y.Nemoto

    Elsevier Journal on Comouter Networks 47 (2) 287-306 2005/02

    DOI: 10.1016/j.comnet.2004.07.010  

  526. A self-adaptive intrusion detection method for AODV-based mobile ad hoc networks Peer-reviewed

    Satoshi Kurosawa, Hidehisa Nakayama, Nei Kato, Abbas Jamalipour, Yoshiaki Nomoto

    2nd IEEE International Conference on Mobile Ad-hoc and Sensor Systems, MASS 2005 2005 773-780 2005

    DOI: 10.1109/MAHSS.2005.1542870  

  527. A Technique of Adaptive Bandwidth Estimation for SACK Based TCP over Wireless Nwtworks Peer-reviewed

    T. Sasaki, H. Tsunoda, N. Kato, Y. Nemoto

    The IEICE Transactions on Communications (Japanese Edition) 2004/10

  528. Historical Character Strings Recognition Using Partial Area Peer-reviewed

    Shigeto Tamazawa, Hidehisa Nakayama, Yuji Waizumi, Nei Kato, Yoshiaki Nemoto

    FIT2004: The 3rd. Forum on Information Technology (Japanese Edition) 2004/09

  529. A Satellite Selection Method for Walker Delta LEO Satellite Networks Peer-reviewed

    U. Dharmaratna, H. Tsunoda, N. Kato, Y. Nemoto

    IEICE Transactions on Communications 2004/08

  530. An explicit and fair window adjustment method to enhance TCP efficiency and fairness over multihops satellite networks Peer-reviewed

    T Taleb, N Kato, Y Nemoto

    IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS 22 (2) 371-387 2004/02

    DOI: 10.1109/JSAC.2003.819989  

    ISSN: 0733-8716

    eISSN: 1558-0008

  531. Supporting IP/LEO satellite networks by handover-independent IP mobility management Peer-reviewed

    H Tsunoda, K Ohta, N Kato, Y Nemoto

    IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS 22 (2) 300-307 2004/02

    DOI: 10.1109/JSAC.2003.819977  

    ISSN: 0733-8716

  532. A Highly Accurate Method Based on Phased Search of Candidate Rectangle Lattice for Handwritten Address Recognition Peer-reviewed

    H. Nakayama, M. Suzuki, N. Kato, Y. Nemoto

    The IEICE Transactions on Communications (Japanese Edition) 2004/02

  533. A round-trip time-based prevention technique to secure LEO satellite networks from denial-of-service attacks

    Tarik Taleb, Nei Kato, Yoshiaki Nemoto

    IEEE Vehicular Technology Conference 60 (6) 4012-4016 2004

    ISSN: 1550-2252

  534. Dynamic Mirror Server Selection Method Consideration about Congestion of Link Peer-reviewed

    Y. Waizumi, K. Utsue, N. Kato, Y. Nemoto

    Transactions of Information Proceeding Society of Japan 2004/01

  535. Handwritten Character Recognition Using Learning Pattern Generation by Nonlinear Normalization Peer-reviewed

    Y. Waizumi, N. Ebisawa, N. Kato, Y. Nemoto

    The IEICE Transactions on Communications (Japanese Edition) 2003/10

  536. Shortening of Triangle Route in non-Mobile IP Node mixed Network Peer-reviewed

    Tomoaki Sasaki, Hiroshi Tsunoda, Nei Kato, Yoshiaki Nemoto

    FIT2003: The 2nd. Forum on Information Technology (Japanese Edition) 2003/09

  537. Neighbors-buffering-based video-on-demand architecture Peer-reviewed

    Tarik Taleb, Nei Kato, Yoshiaki Nemoto

    Signal Processing: Image Communication 18 (7) 515-526 2003/08

    DOI: 10.1016/S0923-5965(03)00039-0  

    ISSN: 0923-5965

  538. 候補あて名の優先度付けによる高速大分類法を用いた手書きあて名認識システム Peer-reviewed

    徳本一崇, 鈴木 雅人, 加藤 寧, 根元 義章

    電子情報通信学会論文誌(D-II J84-D-II (1) 83-92 2001

  539. プロアクティブバッファリングを用いた高精度リモ-トトラヒック観測システムの提案とその性能評価 Peer-reviewed

    金丸 朗, 太田 耕平, 加藤 寧, Glenn MANSFIELD, 根元 義章

    電子情報通信学会論文誌B J84-B (9) 392-401 2001

  540. ネットワ-クの負荷変動を考慮した動的なミラ-サ-バ選択方式 Peer-reviewed

    真壁 知, 太田 耕平, 加藤 寧, Glenn MANSFIELD, 根元 義章

    電子情報通信学会論文誌B J84-B (3) 435-442 2001

  541. 2次混合マハラノビス関数を用いた類似文字識別手法 Peer-reviewed

    鈴木 雅人, 加藤 寧, 根元 義章, 市村 洋

    電子情報通信学会論文誌(D-II) J84-D-II (4) 659-667 2001

  542. Towards trapping wily intruders in the large Peer-reviewed

    G Mansfield, K Ohta, Y Takei, N Kato, Y Nemoto

    COMPUTER NETWORKS 34 (4) 659-670 2000/10

    DOI: 10.1016/S1389-1286(00)00135-3  

    ISSN: 1389-1286

    eISSN: 1872-7069

  543. High speed and high accuracy rough classification for handwritten characters using hierarchical learning vector quantization Peer-reviewed

    Y Waizumi, N Kato, K Saruta, Y Nemoto

    IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS E83D (6) 1282-1290 2000/06

    ISSN: 0916-8532

  544. ニュ-ラルネットワ-クを用いた二者択一方式の手書き文字認識システム Peer-reviewed

    石井 力, 和泉 勇治, 加藤 寧, 根元 義章

    電子情報通信学会論文誌(D-II) J83 (3) 988-995 2000/03

  545. Simple packet aggregation technique for fault detection Peer-reviewed

    Akira Kanamaru, Kohei Ohta, Nei Kato, Glenn Mansfield, Yoshiaki Nemoto

    International Journal of Network Management 10 (4) 215-228 2000

    DOI: 10.1002/1099-1190(200007/08)10:4<215::AID-NEM373>3.0.CO;2-2  

    ISSN: 1055-7148

  546. 管理情報の統合化によるネットワ-ク障害診断支援システムの提案と評価 Peer-reviewed

    加藤 寧, 橋本 定, 太田 耕平, 根元 義章

    電子情報通信学会論文誌B J83-B (9) 1258-1266 2000

  547. 2乗結合を持つ多層パ-セプトロンによる手書き文字の 高精度認識 Peer-reviewed

    和泉 勇治, 加藤 寧, 根元 義章

    電子情報通信学会論文誌(D-II) J83-D-II (10) 1969-1976 2000

  548. A real-time intrusion detection system (IDS) for large scale networks and its evaluations Peer-reviewed

    N Kato, H Nitou, K Ohta, G Mansfield, Y Nemoto

    IEICE TRANSACTIONS ON COMMUNICATIONS E82B (11) 1817-1825 1999/11

    ISSN: 0916-8516

    eISSN: 1745-1345

  549. 候補字種の動的抽出を用いた手書きあて名の2段階認識手法 Peer-reviewed

    鈴木 雅人, 安部 裕之, 加藤 寧, 根元 義章

    電子情報通信学会論文誌(D-II) J82 (11) 1895-1902 1999/11

  550. A proposal of event correlation for distributed network fault management and its evaluation Peer-reviewed

    N Kato, K Ohta, T Ika, G Mansfield, Y Nemoto

    IEICE TRANSACTIONS ON COMMUNICATIONS E82B (6) 859-867 1999/06

    ISSN: 0916-8516

    eISSN: 1745-1345

  551. A handwritten character recognition system using directional element feature and asymmetric mahalanobis distance Peer-reviewed

    N Kato, M Suzuki, S Omachi, H Aso, Y Nemoto

    IEEE TRANSACTIONS ON PATTERN ANALYSIS AND MACHINE INTELLIGENCE 21 (3) 258-262 1999/03

    DOI: 10.1109/34.754617  

    ISSN: 0162-8828

  552. The dynamic symptom isolation algorithm for network fault management and its evaluation Peer-reviewed

    T Mori, K Ohta, N Kato, H Sone, G Mansfield, Y Nemoto

    IEICE TRANSACTIONS ON COMMUNICATIONS E81B (12) 2471-2480 1998/12

    ISSN: 0916-8516

    eISSN: 1745-1345

  553. 地名辞書の文字連結情報を利用した手書き宛名の切出 し候補矩形削減 Peer-reviewed

    Nei KATO, Satoshi SUZUKI, Masato SUZUKI, Yoshiaki NEMOTO

    情報処理学会論文誌 39 (11) 3009-3017 1998/11

    Publisher: Information Processing Society of Japan (IPSJ)

    ISSN: 1882-7764

    More details Close

    In handwritten address recognition, it's important to segment characters correctly and speedily. Due to the touched or intricate images in address, it has to use some thresholds to infer the segmentation positions. So that a lot of prolix candidate boxes are generated, this leads to a large amount of time consumption in post-processing. In this paper, we propose a new method to reduce the prolix candidate boxes using conjunction information of address by investigating 3 continued boxes. In experiment of 370 samples distributed by Institute for Posts and Telecommunication Policy, MPT, the effectiveness of the new method is confirmed.

  554. 特徴量の要素の相関を考慮した高速・高精度な識別関数と文字認識への応用 Peer-reviewed

    孫 方, 大町 真一郎, 加藤 寧, 阿曽 弘具

    電子情報通信学会論文誌(D-II) J81 (9) 2027-2034 1998

  555. 混合マハラノビス関数による高精度な類似文字識別手法 Peer-reviewed

    鈴木雅人, 大町真一郎, 加藤寧, 阿曽弘具, 根元義章

    電子情報通信学会論文誌 J80-D-II (10) 2752-2760 1997/10

  556. キ-文字駆動型地名推論に基づく手書きあて名認識 Peer-reviewed

    鈴木雅人, 加藤寧, 阿曽弘具, 根元義章, 市村洋

    電子情報通信学会論文誌 J80-D-II (5) 1077-1085 1997/05

  557. ストロ-ク情報に基づく手書き郵便宛名の切出しに関する一手法 Peer-reviewed

    井野英文, 猿田和樹, 加藤寧, 根元義章

    情報処理学会論文誌 28 (2) 280-289 1997/02

  558. Construction and utilization experiment of multimedia education system using satellite ETS-V and the Internet Peer-reviewed

    Y Nemoto, N Hamamoto, R Suzuki, T Ikegami, Y Hashimoto, T Ide, K Ohta, G Mansfield, N Kato

    IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS E80D (2) 162-169 1997/02

    ISSN: 0916-8532

  559. Problems in management information retrieval for high-speed networks and a proposed solution Peer-reviewed

    K Ohta, N Kato, H Sone, G Mansfield, Y Nemoto

    IEICE TRANSACTIONS ON COMMUNICATIONS E79B (8) 1054-1060 1996/08

    ISSN: 0916-8516

    eISSN: 1745-1345

  560. 排他的学習ネットELNETを用いた手書き文字認識の細分類手法 Peer-reviewed

    猿田 和樹, 加藤 寧, 安倍 正人, 根元 義章

    電子情報通信学会論文誌 J79-D-II (6) 851-859 1996/05

  561. A handprinted character recognition system using image transformation based on partial inclination detection Peer-reviewed

    M Suzuki, N Kato, H Aso, Y Nemoto

    IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS E79D (5) 504-509 1996/05

    ISSN: 0916-8532

  562. High accuracy recognition of ETL9B using Exclusive Learning neural NETwork-II (ELNET-II) Peer-reviewed

    K Saruta, N Kato, Y Nemoto

    IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS E79D (5) 516-522 1996/05

    ISSN: 0916-8532

  563. Configuring a network management system for efficient operation Peer-reviewed

    Kohei Ohta, Nei Kato, Glenn Mansfield, Yoshiaki Nemoto

    International Journal of Network Management 6 (2) 108-118 1996/03

    DOI: 10.1002/(SICI)1099-1190(199603/04)6:2<108::AID-NEM200>3.0.CO;2-T  

    ISSN: 1055-7148

  564. 改良型マハラノビス距離を用いた高精度な手書き文字認識 Peer-reviewed

    加藤 寧, 安倍 正人, 根元 義章

    電子情報通信学会論文誌 J79-D-II 45-52 1996

  565. Hand-written Character Recognition System Using Uniform Division of Training Samples on Subspace Method Peer-reviewed

    Nei KATO, Yoshiaki NEMOTO

    GSIS TOHOKU Univ., Interdisiplinary 2 (2) 159-167 1996

    Publisher: Tohoku University

    DOI: 10.4036/iis.1996.159  

    ISSN: 1340-9050

    More details Close

    In spite of the fact that subspace method can approximate the distribution of categories precisely, only a few attempts have so far been made at applying it in hand-written character recognition. The subspace method proposed by Watanabe (1969) offers the basic concept of subspace construction, but the issue of how to use the limited samples to construct effective subspace to avoid the problem of mis-recognition caused by the fact that the subspace of a category is almost parallel to the mean vector of the category remains unresolved. This problem leads to the mis-recognition of the samples far from the mean vector. To cope with this problem, Abe, Nemoto and Sun (1995) have proposed the Combination method (CM), which constructs the subspace from several groups including different number of samples divided from the whole training samples. CM obtained a high recognition rate of 97.76% with respect to ETL9B, the largest database of hand-written characters in Japan. ETL9B was published by Electro-technical Laboratory of Japan in 1985. It includes 2,965 categories of Chinese characters and 71 categories of Japanese Kana, there are 200 data sets in the database where each set has one sample per category. Total number of samples is 607,200. The issues that need to be dealt with next are how to improve the recognition accuracy and how to accelerate the recognition speed. In this paper, we propose a new method called Uniform Division Method (UDM), which uses the uniformly divided training samples to construct subspace. Compared to CM given earlier, UDM is very simple and effective enough to improve the accuracy of recognition; as a result, we obtained a recognition rate of 98.64% for ETL9B compared to the 97.76% for CM. This is the first time that such a high recognition rate has been obtained by making good use of subspace method. Furthermore, the computation required for UDM is less than a half of that of CM. The UDM algorithm and the experiments with ETL9B will be described in this paper.

  566. 部分整合領域の自動学習による手書き文字認識の詳細識別に関する一手法 Peer-reviewed

    孫 寧, 安倍 正人, 根元 義章

    電子情報通信学会論文誌 J78-D-II 452-500 1995

  567. 改良型方向線素特徴量および部分空間法を用いた高精度な手書き文字認識システム Peer-reviewed

    孫 寧, 安倍 正人, 根元 義章

    電子情報通信学会論文誌 J78-D-II 922-930 1995

  568. 係数変化型学習法とその手書き文字認識への応用 Peer-reviewed

    猿田 和樹, 孫 寧, 安倍 正人, 根元 義章

    電子情報通信学会論文誌 J78-D-II 973-981 1995

  569. 入力パタ-ンのばらつき推定による手書き文字の手書き文字認識の新手法 Peer-reviewed

    孫 寧, 郭 軍, 根元 義章, 佐藤利三郎

    電子情報通信学会論文誌 J-78-D-II 79-90 1994

  570. 余弦整形変換を用いた手書き文字認識アルゴリズム Peer-reviewed

    郭 軍, 孫 寧, 根元 義章, 木村 正行, 越後 宏, 佐藤利三郎

    電子情報通信学会論文誌 J-76-D-II 835-842 1993

  571. 整形変換を用いた手書き文字デ-タベ-スETL9Bの高精度認識 Peer-reviewed

    郭 軍, 孫 寧, 根元 義章, 佐藤利三郎

    電子情報通信学会論文誌 J-76-D-II 1015-1022 1993

  572. 文字構造情報に基づく高精度な文字切出し処理を用いた文字認識システム Peer-reviewed

    孫 寧, 鈴木 雅人, 根元 義章, 阿曽 弘具, 木村 正行

    情報処理学会論文誌 (32) 1083-1091 1992

  573. 方向線素特徴量を用いた高精度文字認識 Peer-reviewed

    孫 寧, 田原 透, 阿曽 弘具, 木村 正行

    電子情報通信学会論文誌 J74-D-II 330-339 1991

  574. 連想整合法に基づく高速文字認識アルゴリズム Peer-reviewed

    孫 寧, 阿曽 弘具, 木村 正行

    情報処理学会論文誌 (32) 404-413 1991

Show all ︎Show first 5

Misc. 139

  1. Routing for crowd management in smart cities: A deep reinforcement learning perspective

    Lei Zhao, Jiadai Wang, Jiajia Liu, Nei Kato

    IEEE Communications Magazine 57 (4) 88-93 2019/04/01

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/MCOM.2019.1800603  

    ISSN: 1558-1896 0163-6804

  2. A Study on Optimization of Dynamic Radio Frame Construction for UAV Networks using Relay Communication (衛星通信)

    高橋 優元, 川本 雄一, 西山 大樹, 加藤 寧, 小野 文枝, 三浦 龍

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 117 (261) 83-86 2017/10/26

    Publisher: 電子情報通信学会

    ISSN: 0913-5685

  3. A Study on a Speedup Method for Group Formation Time of Terminal to Terminal Communication Using Wi-Fi Direct

    117 (204) 103-108 2017/09/07

    Publisher: 電子情報通信学会

    ISSN: 0913-5685

  4. A Study on Network Resource Assignment Depending on Data Traffic in C-RAN

    117 (206) 53-56 2017/09/07

    Publisher: 電子情報通信学会

    ISSN: 0913-5685

  5. A Study on Power Consumption of Cloud-Radio Access Network (通信方式)

    LEE Yunseong, NISHIYAMA Hiroki, KATO Nei

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 117 (206) 61-64 2017/09/07

    Publisher: 電子情報通信学会

    ISSN: 0913-5685

  6. A Study on Handover Detection Considering the Amount of Allocated Resources for Observation UA using Ground Station and Satellite Station

    117 (174) 1-6 2017/08/17

    Publisher: 電子情報通信学会

    ISSN: 0913-5685

  7. A Study on the Construction Method of the Virtual Cell for the Information Diffusion by Device-to-Device Communication

    117 (134) 61-66 2017/07/19

    Publisher: 電子情報通信学会

    ISSN: 0913-5685

  8. A Study on Flexibility Evaluation Model of Satellite Communication System

    116 (470) 13-16 2017/02/23

    Publisher: 電子情報通信学会

    ISSN: 0913-5685

  9. A Study on Group-Based Spatial TDMA for Maximizing Communication Throughput in Unmanned Aircraft System

    116 (433) 13-16 2017/01/27

    Publisher: 電子情報通信学会

    ISSN: 0913-5685

  10. A Study on the Analysis of Flexible Frequency Utilization in Satellite Communication Systems with Digital Channelizer (Space, Aeronautical and Navigational Electronics) -- (ICSANE 2016)

    116 (319) 11-14 2016/11/24

    Publisher: 電子情報通信学会

    ISSN: 0913-5685

  11. A Study on the Construction of a System Analysis Model to Measure the Frequency Flexibility of Satellite Communications System

    116 (183) 101-104 2016/08/18

    Publisher: 電子情報通信学会

    ISSN: 0913-5685

  12. The Classification of UA Networks and The Performance Evaluation of Fixed UA Networks

    116 (144) 99-102 2016/07/21

    Publisher: 電子情報通信学会

    ISSN: 0913-5685

  13. An Adaptive Beam Control Technique for LEO Satellite to Mitigate Interference to Terrestrial Networks

    116 (41) 19-23 2016/05/19

    Publisher: 電子情報通信学会

    ISSN: 0913-5685

  14. B-18-47 A Study on the Effect of Feedback Control for Realizing Real-Time IoT Systems

    Takagi Hiroaki, Nishiyama Hiroki, Kato Nei

    Proceedings of the IEICE General Conference 2016 (2) 545-545 2016/03/01

    Publisher: The Institute of Electronics, Information and Communication Engineers

  15. B-3-3 Throughput Analysis of Real-Time Data Transmission over Multiple UAVs in Residential Area

    Horiuchi Masanori, Nishiyama Hiroki, Kato Nei

    Proceedings of the IEICE General Conference 2016 (1) 290-290 2016/03/01

    Publisher: The Institute of Electronics, Information and Communication Engineers

  16. B-8-56 A Power Saving Technology for Wireless Sensor Networks

    Lee Yunseong, Nishiyama Hiroki, Kato Nei

    Proceedings of the IEICE General Conference 2016 (2) 255-255 2016/03/01

    Publisher: The Institute of Electronics, Information and Communication Engineers

  17. A Study on Data Transfer Rate Considering Downlink Condition for the LEO Optical Satellite Network

    115 (448) 7-10 2016/02/16

    Publisher: 電子情報通信学会

    ISSN: 0913-5685

  18. A Study on Evaluation Model of DBF in Integrated Satellite and Terrestrial Systems

    115 (287) 21-24 2015/11/04

    Publisher: 電子情報通信学会

    ISSN: 0913-5685

  19. Throughput Evaluation of Real-time Data Transmission over Multiple UAVs (Satellite Telecommunications)

    115 (241) 105-108 2015/10/07

    Publisher: 電子情報通信学会

    ISSN: 0913-5685

  20. TK-3-3 Challenges of Networks from the Perspective of IoT

    Kawamoto Yuichi, Sato Keisuke, Nishiyama Hiroki, Kato Nei

    Proceedings of the Society Conference of IEICE 2015 (1) "SSS-22"-"SSS-23" 2015/08/25

    Publisher: The Institute of Electronics, Information and Communication Engineers

  21. B-3-7 A Study on Beam Pointing for LEO Site-diversity

    Tani Shigenori, Tsuzaki Shogo, Motoyoshi Katsuyuki, Sano Hiroyasu, Okamura Atsushi, Nishiyama Hiroki, Kato Nei

    Proceedings of the Society Conference of IEICE 2015 (1) 192-192 2015/08/25

    Publisher: The Institute of Electronics, Information and Communication Engineers

  22. B-3-25 A Study on Effective Data Transmission Method for Sending Earth Observation Data Utilizing Unstable Optical Satellite Links

    Kaneko Kazuma, Nishiyama Hiroki, Kato Nei

    Proceedings of the IEICE General Conference 2015 (1) 277-277 2015/02/24

    Publisher: The Institute of Electronics, Information and Communication Engineers

  23. BS-3-58 Resource-Efficient Data Placement for MapReduce in Wireless Data Center Networks(BS-3. Advanced Technologies in the Design, Management and Control for Future Innovative Communication Network)

    Suto Katsuya, Nishiyama Hiroki, Kato Nei

    Proceedings of the IEICE General Conference 2015 (2) "S-118"-"S-119" 2015/02/24

    Publisher: The Institute of Electronics, Information and Communication Engineers

  24. B-8-13 A POWER SAVING TECHNIQUE FOR RADIO ACCESS NETWORK WITH POWER OVER FIBER

    Miyanabe Keisuke, Nishiyama Hiroki, Kato Nei

    Proceedings of the IEICE General Conference 2015 (2) 257-257 2015/02/24

    Publisher: The Institute of Electronics, Information and Communication Engineers

  25. A Study on Evaluation Model for Efficiency of Frequency Sharing in Satellite and Terrestrial Network Combination System

    MIYASHITA Naoki, NISHIYAMA Hiroki, KATO Nei

    Technical report of IEICE. SAT 114 (449) 109-114 2015/02/18

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

    More details Close

    Recently, in order to improve the exhaustion of the frequency in the terrestrial network, satellite and terrestrial network combination system have been attracted much attention. In this combination system, the assigned frequency band of satellite communication is distributed to satellite and terrestrial network, so it is possible to improve the problem. Also, the area such as mountain region and sea is hard to deploy the base stations. Since satellite has broad coverage, users can communication with satellite there. Furthermore, if terrestrial infrastructure is destroyed when the natural disaster strikes, there is big demand to communicate but many users cannot communicate with someone. In this time, satellite have no damage because it is in space. Therefore many users can reliable communicate with someone. In frequency distribution, the exhaustion of the frequency is improved when the frequency band is distributed to terrestrial network. However, in the case satellite and terrestrial network is distributed the duplicate frequency band, the interference occur and frequency efficiency is decreased in the combination system. In this study, we propose a determination of the frequency distribution for maximizing frequency efficiency considering interference in satellite and terrestrial network combination system.

  26. A Study on Trajectory Control Scheme for Improving Probability of Link Connection in UAV Networks (Satellite Telecommunications)

    TAKAISHI Daisuke, NISHIYAMA Hiroki, KATO Nei, MIURA Ryu, ONO Fumie

    Technical report of IEICE. SAT 114 (265) 35-40 2014/10/23

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

    More details Close

    Unmanned Aerial Vehicles (UAVs) have been attracting much attention as a network component that provides network connectivity to out of service areas in cellular networks. Such UAVs can increase their coverage area compared to a single-UAV network by a constructing mesh network with swarm of UAVs. However, due to both the limitation of wireless communication range and mobility of UAVs, sometimes inter-UAV links are disconnected. Link disconnections degrade network performance such as successful communication ratio and end-to-end delay. Then, we formulate the relationship between UAVs' trajectories and probability of inter-UAV link connection. Based on the formulated relationship, we propose the trajectory decision scheme for improving probability of end-to-end link connection. Furthermore, we conduct computer simulations to evaluate the performance of our proposed scheme.

  27. A Study on an Effective Utilization for Dynamic Ground Meshnetworks with Satellites

    KOSEKI Shin, NISHIYAMA Hiroki, KATO Nei, JEONG Byeong-Pyo, TOYOSHIMA Morio

    Technical report of IEICE. SAT 114 (179) 57-62 2014/08/19

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

    More details Close

    After drastic disasters, such as earthquakes and tsunamis, communications systems can be destroyed while the demand for communication services increases. This leads to congestion in remaining communication systems. Therefore, the networks which are resilience to disasters are gaining much attention. In this paper, we focus on satellite-terrestrial wireless mesh integrated networks that combines satellites networks and Wireless Mesh Networks (WMN). This network makes it possible to provide communications after disaster. In order to utilize the satellite-terrestrial network efficiently, the problem of positioning satellite gateways needs to be addressed. Therefore, we propose a technique for deploying satellite gateways that distribute traffic load.

  28. Search!! 研究室Report 学術の最先端はいま! 災害時にも使える! Wi-Fiネットワーク研究の最前線 : スマホdeリレーとICTカーが見せる新たなWi-Fi利用

    西山 大樹, 加藤 寧

    J-LIS = ジェイリス : 地方自治情報誌 1 (4) 31-35 2014/07

    Publisher: 地方公共団体情報システム機構

    ISSN: 2188-4943

  29. B-3-24 A Field Experimental Report on the Effect of Height Different in Multi-hop Data Transmission

    Takaishi Daisuke, Nishiyama Hiroki, Kato Nei

    Proceedings of the IEICE General Conference 2014 (1) 323-323 2014/03/04

    Publisher: The Institute of Electronics, Information and Communication Engineers

  30. B-6-144 Towards Providing Fairness in PON-WMN based FiWi Networks

    AVAKUL Panu, NISHIYAMA Hiroki, KATO Nei

    Proceedings of the IEICE General Conference 2014 (2) 144-144 2014/03/04

    Publisher: The Institute of Electronics, Information and Communication Engineers

  31. B-6-121 Improving User Throughput by Dynamically Selecting Gateway in FiWi Access Networks

    NGO Thuan, NISHIYAMA Hiroki, KATO Nei

    Proceedings of the IEICE General Conference 2014 (2) 121-121 2014/03/04

    Publisher: The Institute of Electronics, Information and Communication Engineers

  32. DS-2-6 Relay-by-Smartphone as A Self-Forming Mobile Terminal Network System

    Nishiyama Hiroki, Takaishi Daisuke, Kato Nei

    Proceedings of the IEICE General Conference 2014 (1) "S-31" 2014/03/04

    Publisher: The Institute of Electronics, Information and Communication Engineers

  33. A Study on the Decision of Communication Method in Heterogeneous Networks

    KANEKO Kazuma, NISHIYAMA Hiroki, KATO Nei

    Technical report of IEICE. SAT 113 (436) 11-16 2014/02/20

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

    More details Close

    Recently, due to the widespread of smartphones and tablet PCs, the availability of frequency band becomes a critical problem in cellular network. In order to cope with this problem, typical cellular networks usually offload some traffic to smaller size cell which have smaller coverage area than the traditional macrocell. These kinds of networks are usually referred to as heterogeneous network. Since the transmission power of the base stations of the macro cells are usually much higher than those of the smaller cell, the effectiveness of the offloading of traffic to the smaller cells is reduced. Due to the insufficient frequency availability and the ineffectiveness of heterogeneous networks, Satellite-Terrestrial Integrated mobile Communication System (STICS) has attracted much attention. However, current STICS does not have a mechanism to control whether user terminals should be associated with macrocell, smaller cells or the satellite. This may lead to the reduction of network capacity. In this paper, we propose a method for user terminals association selection by deciding if a given macrocell's base station should be turned off to maximize system capacity in STI

  34. Invited Talk : Relay-by-Smartphone : A Novel Approach for Realizing Autonomous Decentralized Network

    NISHIYAMA Hiroki, KATO Nei

    IEICE technical report 113 (400) 85-90 2014/01/23

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

    More details Close

    In the area without cellular coverage, it was made possible to share information between people by using only WiFi functionality of smartphones, which have become remarkably popular recently. By relaying data via surrounding smartphones, information can be shared between not only near people but also people in a far distance. Therefore, we can expect many future applications such as communications in emergency cases caused by disasters, delivery coupons and advertisements in shopping centers, sharing information in crowded event places, use instead of transceivers between traveling groups, and so forth. In this talk, the prototype system and its specifications, particularly the implementation and the field test of the dual mode (MANET and DTN) network system, which we refer to as the "Relay-by-Smartphone", will be introduced along with the discussion of future prospects.

  35. Special Invited Talk : En Route to Smart Fiber Wireless (SFiWi) Networks

    NISHIYAMA Hiroki, KATO Nei

    IEICE technical report. Communication systems 113 (295) 33-37 2013/11/14

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Fiber-Wireless (FiWi) networks integrate optical and wireless networks. Thus, FiWi networks have large bandwidth of optical networks and the ubiquity and mobility of wireless networks. Wireless networks provide ubiquitous and flexible communication as long as the client is within the communication range of the network, but their capacity is small. On the other hand, optical networks provide high capacity and long distance communication, but cannot provide flexible and ubiquitous communication. However, by combining these two networks, FiWi networks can leverage their advantages. FiWi networks expected to be widely deployed in the future. In this paper, we focus on Smart Fiber Wireless (SFiWi) which aims at reducing energy consumption in both fiber and wireless parts.

  36. Dynamic Replication Control with Load Mitigation of Satellite Communication in Disruption-Tolerant Networks

    TAKAHASHI Asato, NISHIYAMA Hiroki, KATO Nei, NAKAHIRA Katsuya, SUGIYAMA Takatoshi

    Technical report of IEICE. SAT 113 (258) 39-44 2013/10/24

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

    More details Close

    Satellite networks have gained much attention as a technique that provide reliable communication in an area without cellular signal. Additionally, Disruption-Tolerant Networks (DTNs) can further improve the performance of satellite networks by expanding the coverage of ground stations by using multi-hop message transfer among mobile nodes. However, conventional DTN routing schemes present a problem in terms of satellite communication load and message delivery reliability among mobile nodes. Therefore, in this paper, we propose a dynamic replication control scheme in DTNs that aims to improve the reliability of mobile nodes, which are out of ground station coverage and mitigate the satellite communication load. Furthermore, we conduct computer simulations to evaluate the performance of our proposed scheme.

  37. A Study on Efficient Utilizing of Bandwidth in Satellite-Routed Sensor System (SRSS)

    Kawamoto Yuichi, Nishiyama Hiroki, Kato Nei

    Proceedings of the Society Conference of IEICE 2013 (1) 298-298 2013/09/03

    Publisher: The Institute of Electronics, Information and Communication Engineers

  38. An Efficient Data Transfer Scheme for Wide Area Distributed Storage Systems

    Suto Katsuya, Nishiyama Hiroki, Kato Nei

    Proceedings of the Society Conference of IEICE 2013 (1) 297-297 2013/09/03

    Publisher: The Institute of Electronics, Information and Communication Engineers

  39. A Technique for Selecting Number of Satellite Gateways to Improve Overall Network Throughput of Satellite-Terrestrial Wireless Mesh Integrated Networks

    YOSHIDA Kazuma, NISHIYAMA Hiroki, KATO Nei

    Technical report of IEICE. SAT 113 (193) 13-16 2013/08/29

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

    More details Close

    At the time of disaster such as earthquakes or tsunami, the communications systems on the ground can be damaged or destroyed. Satellite networks are one of the networks that can remain available after disaster strikes. By setting up an antenna for mobile satellite communication, the users in the disaster area are able to use communication services over satellite networks. Additionally, Wireless Mesh Networks (WMN) are also one of the available network at the time of disasters because it can be promptly deployed after disaster occurs. By using wireless connection of remaining mesh routers in the disaster area, disaster victims are able to use communication services through mesh routers. In this paper, we focus on satellite-terrestrial wireless mesh integrated networks that combines satellite networks and WMN. We show that system throughput is determined by the number of satellite base stations for mobile satellite communications, and we propose a method to decide the appropriate number of satellite Gate Way (GW) for mobile satellite communication to maximize throughput.

  40. A Study on the Trajectory Control Algorithm in UAS Network

    TAKAISHI Daisuke, NISHIYAMA Hiroki, KATO Nei, MIURA Ryu

    Technical report of IEICE. SAT 113 (152) 5-10 2013/07/24

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    UAS (Unmanned Aircraft System) has received increasing attention due to their potential to realize ubiquitous networks. UAS has been used in military purposes, such as scouting enemy field. Moreover, with their advantage of gathering data quickly, UAS has been paid much attention in civil purposes, such as communications in disaster areas where network infrastracture has been devastated by eaqrthquake and tsunami. UAS can be used to provide network service. However, there are some limitations regarding the communication distance between UAV and receivers. A UAV can not connect to the receiver wichi is outside the communication range. Therefore, in order to send the data gathered from outside the communication range to the receiver, the UAV need to move. As a result, single UAV can not gaher data in a large area in real-time. In order to solve this problem, we focus on UAS networks. In UAS networks, UAVs construct mesh network and send data by multi-hop communications. However, in such networks, network performance (e.g. delay, throughput) is varied by the number of UAVs and the trajectory of UAVs. In this research, we formulate the peformance of UAS networks. To construct high peformance UAS Network, we propose a scheme to decide the UAV Trajectory.

  41. A Study on an Efficient Routing Scheme Considering Mass Storage Device for Satellite Networks

    KANEKO Kazuma, NISHIYAMA Hiroki, KATO Nei

    Technical report of IEICE. SAT 113 (32) 13-18 2013/05/16

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Recently, since improvement of wireless devices and it is common to communicate a large amount of contents, the load to communication infrastructures increases. Communication infrastructures are consisted with grand-based stations, so these infrastructures cannot be used in rural areas where it is difficult to built grand-based stations and disaster areas where grand-based station is destroyed. In this research, we focus on satellite networks because of their high ability such as disaster resistance and wide coverage. Next generation networks has to communicate a large amount data, therefore we assume the satellite networks which each satellite is equipped with a mass storage devices. By using mass storage devices, the satellite networks can handle a large amount of data. Nowadays, diverse routing methods are proposed for the satellite networks to improve effectiveness of data communication. However, there are no routing methods considering a mass storage devises, by using the routing method in existence for such kind of networks leads to inefficiently data communication. In this paper, we propose a new routing method effectively utilizing the storage devices and analyze with some mathematical expressions.

  42. B-3-21 Report on Radio Environment Observation by using Inmalsat BGAN

    Yoshida Kazuma, Yamamoto Shinichi, Nishiyama Hiroki, Yoshimura Naoko, Kato Nei, Kadowaki Naoto

    Proceedings of the IEICE General Conference 2013 (1) 330-330 2013/03/05

    Publisher: The Institute of Electronics, Information and Communication Engineers

  43. B-6-116 Report on Field Experiments for Performance Comparison Between DTN and MANET

    Ito Masaya, Nishiyama Hiroki, Kato Nei

    Proceedings of the IEICE General Conference 2013 (2) 116-116 2013/03/05

    Publisher: The Institute of Electronics, Information and Communication Engineers

  44. B-6-140 A Routing S election Algorittm for Dynamic Wireless Networks

    Nishimura Kimi, Kumagai Ken, Nishiyama Hiroki, Kato Nei

    Proceedings of the IEICE General Conference 2013 (2) 140-140 2013/03/05

    Publisher: The Institute of Electronics, Information and Communication Engineers

  45. B-6-136 A Study on Communication Method for Renewable Energy Driven Wireless Mesh Networks

    Ota Takafumi, Nishiyama Hiroki, Kato Nei, Yamada Hirohito

    Proceedings of the IEICE General Conference 2013 (2) 136-136 2013/03/05

    Publisher: The Institute of Electronics, Information and Communication Engineers

  46. B-6-44 Basic Experiment of iSCSI Communication in Virtualized Storage

    Suto Katsuya, Nishiyama Hiroki, Kato Nei, Nakachi Takayuki, Fujii Tatsuya, Takahara Atsushi

    Proceedings of the IEICE General Conference 2013 (2) 44-44 2013/03/05

    Publisher: The Institute of Electronics, Information and Communication Engineers

  47. TK-3-6 Mobile Device-Driven Self-Directive Network for Message Delivery in D isaster Area

    Nishiyama Hiroki, Kato Nei

    Proceedings of the IEICE General Conference 2013 (2) "SSS-28"-"SSS-29" 2013/03/05

    Publisher: The Institute of Electronics, Information and Communication Engineers

  48. A Study on High Speed Packet Processing of Layer-3 Diversity Switch for a Satellite Signal Interception Countermeasure

    NAKAHIRA Katsuya, SUGIYAMA Takatoshi, NISHIYAMA Hiroki, KATO Nei

    Technical report of IEICE. SAT 112 (440) 29-34 2013/02/21

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    To realize railway satellite Internet systems providing public wireless LAN service to passengers in a train by using a satellite communication, Layer-3 diversity switch (L3-DIV) that is a countermeasure against IP packet losses due to satellite signal interceptions by obstacles along rail tracks becomes essential However, IP packet processing time of L3-DIV dominantly may increase if we use a high speed satellite communication system L3-DIV copies and stores an input IP packet to a matching-list Then it compares the input IP packet with the previous stored IP packets not to output the same IP packet from L3-DIV Since a number of IP packet comparison increases in proportion to the number of IP packets stored in the matching-list, this paper proposes a dividing matching-lists structure into N pieces is proposed to enable a high-speed IP packet processing of L3-DIV Various traffic patterns were applied to the proposing method As a result, the proposing method demonstrated the effect of reducing packet processing time

  49. A Study on Distributed Storage System with Erasure Coding over Satellite Networks

    SUTO Katsuya, NISHIYAMA Hiroki, KATO Nei

    Technical report of IEICE. SAT 112 (255) 131-135 2012/10/17

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    High-speed communication becomes possible among distant locations by the rapid growth of broad-band networks. A cloud storage service, which stores date in Data Centers (DCs) and provides Storage as a Service (SaaS), becomes the medium of choice in recent years. On the other hand, satellite networks have attracted much attention as a type of network that is tolerant to link disruptions caused by disaster. In order to realize a cloud storage that is tolerant to disasters, we study a novel distributed storage system integrated satellite networks. This integrated system achieves high confidentiality and robustness to distribute data by using an erasure coding. In this paper, we evaluate the impact of the erasure coding on the communication performance of the integrated storage system. Additionally, we propose a method to reduce the transmission time for the restoration of lost data in the integrated storage system with erasure coding and also verify the efficacy of the proposed method.

  50. Analysis of Transmission Delay in Regional Networks based on PON and WLAN

    SUZUKI Kenta, NISHIYAMA Hiroki, KATO Nei

    IEICE technical report 112 (231) 119-123 2012/10/04

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    In regional networks, which are made up of Passive Optical Network (PON) and Wireless Local Area Network (WLAN), it is important to coordinate with different QoS control techniques between PON and WLAN. In this paper, we construct a network model, and verify the relationship between cycle time of Dynamic Bandwidth Allocation (DBA) and transmission delay of up-stream traffic. Finally, we discuss about the effective QoS control technique in consideration of the verification results.

  51. A Study on a Hierarchical P2P Network Topology Robust to Attack and Node Departure

    SUTO Katsuya, NISHIYAMA Hiroki, KATO Nei, NAKACHI Takayuki, FUJII Tatsuya, TAKAHARA Atsushi

    IEICE technical report 112 (231) 19-24 2012/10/04

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    In P2P (peer-to-peer) networks, where nodes can freely participate in the network and depart from the network, it is necessary to realize a network robust to node departure. Hierarchical P2P networks such as Gnutella and Kazaa employ a two-tire structure by classifying nodes into higher-layer and lower-layer ones, and they can be tolerant to node from lower-layer departures because higher-layer nodes improve network connectivity. However, they are vulnerable to attacks targeting higher-layer nodes because the removal of high degree nodes dramatically degrade the network connectivity rather than the departure of low degree nodes. To cope with this issue, a bimodal degree distribution, which is tolerant to both attacks and node departures, have been studied. However, a network topology configuration following the bimodal degree distribution is not taken into account in the previous works. Therefore, in this paper, we study an optimal network topology for attacks and departures tolerance.

  52. A Study on Bandwidth Allocation Method Considering Real-Time Performance in Next Generation Satellite-Routed Sensor System (SRSS)

    KAWAMOTO Yuichi, NISHIYAMA Hiroki, KATO Nei, YAMAMOTO Shinichi, YOSHIMURA Naoko, KADOWAKI Naoto

    Technical report of IEICE. SAT 112 (191) 49-54 2012/08/23

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    In recent years, Satellite-Routed Sensor Systems (SRSSs) have attracted attention as networks for disaster detection and environmental observation. Since these networks use satellites to relay the data from sensor terminals, they allow to collect data from the sensor terminals which are deployed in a remote area such as sea or mountain. To use these networks for disaster detection and environmental monitoring, it is needed to collect data from many sensor terminals which deployed wide area in real time. Thus, the efhciant way to allocate satellite bandwidth to each sensor terminal is necessary. Therefore, in this paper, we discuss an appropriate bandwidth allocation model while considering the real-time performance. In the new model, we particularly focus on the relationship between throughput of each sensor terminals and real-time performance, and introduce a method to allocate band widths.

  53. A Study on an Efficient Routing Scheme in Delay- and Disruption-Tolerant Networks

    TAKAHASHI Asato, NISHIYAMA Hiroki, KATO Nei, NAKAHIRA Katsuya, SUGIYAMA Takatoshi

    Technical report of IEICE. SAT 112 (191) 61-66 2012/08/23

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Recently, it is desired to achieve communications in areas which do not have enough base stations, such as disaster areas or depopulated areas. Satellite networks and Delay- and Disruption-Tolerant Networks (DTN) command attention as technologies being able to provide reliable communications in those areas. Hence, in this paper, we focus on combined networks of satellite networks and DTN. In this combined networks, communications between source nodes and base stations are achieved with DTN, while communications from base station to destination nodes are attained by satellite networks. Generally, link disruptions with the movement of nodes often occur, and this disadvantage governs reliability of combined networks. In order to resolve this problem, we pay attention to Binary Spray and Wait (BSW), which is one of the routing schemes in DTN. BSW can provide high delivery ratio by replicating messages, and control resource consumption by limiting the number of replicated messages. However, despite the fact that limited numbers are different depending on the relationship of between source nodes and base stations in BSW, the limited number is identically set for all users. In this paper, therefore, we propose a new routing scheme based on BSW, which changes the limited number of replicated messages according to the distance from a source node to its nearest base station. Moreover, with computing simulation, we realized experiments to evaluate the performance of our proposed routing scheme.

  54. Assessing Fairness of Message Delivery in Delay- and Disruption-Tolerant Networks in Disaster Areas

    TAKAHASHI Asato, NISHIYAMA Hiroki, KATO Nei

    Technical report of IEICE. SAT 112 (150) 13-18 2012/07/19

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Recently, it is drew attention to communicate in disaster areas with being taking more interest in natural disasters. In disaster areas, it is difficult for users to transfer messages because many base stations may stop working from damages or power shortages. It is known to be tolerant to disasters that Delay- and Disruption-Tolerant Networks (DTN) and Satellite Networks. DTN can provide the communication regardless to base stations, and Satellite Networks achieve the telecommunication due to relay between base stations. To make use of both remarkable points, we focus on the combination of DTN and Satellite Networks. In this combined network, link disruptions due users to move in territorial network affected the end-to-end communications greatly. In this paper, we take particular note of DTN routing schemes which achieve message transfers from source nodes to base stations. Finally, we compare the performances, especially fairness of delivery ratio, of each DTN routing with computing simulation.

  55. Evaluation of the Effect of ONU Sleep Mechanism on TCP Communications in PON

    TOGASHI Ko, NISHIYAMA Hiroki, KATO Nei, UJIKAWA Hirotaka, SUZUKI Ken-Ichi, YOSHIMOTO Naoto

    IEICE technical report. Communication systems 112 (118) 23-28 2012/07/05

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Due to the increase in contents volume and network participants, the electric consumption of access networks, such as Passive Optical Network (PON) is rising steadily. Because Optical Network Unit (ONU) consumes more than 60 percents of the total energy amount of PON, cutting off the ONU's consumption is important. Therefore, attention is being paid on the sleep mode that periodically suspends some mechanisms on ONU and reduces energy consumption. During ONU sleep mode, though there is a decrease in power consumption, there is occurence of delay in the transmission of data frame. Therefore there is a trade-off relation between power consumption and throughput. However it is not obvious to evaluate the effect of the sleep period length on the transmission delay and on TCP throughput. In this report, we perform the modeling on ONU sleep mechanism and its effect on TCP communications in PON through numerical analysis.

  56. A Study on a Route Control Method to Avoid Congestion in the Destination Area for Two-Layered Satellite Networks

    YOSHIDA Kazuma, NISHIYAMA Hiroki, KATO Nei, YOSHIMURA Naoko, TOYOSHIMA Morio, KADOWAKI Naoto

    Technical report of IEICE. SAT 112 (51) 23-28 2012/05/17

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Satellite networks have received increasing attention as a means to provide a next generarion network able to realize an Ubiquitous Network. Due to their wide coverage and their resistance to disasters, satellite networks have recently become highly expected in time of natural disaster. However satellite covering disaster area face a problem of congestion due to the numerous traffic. It is therefore necessary to make a distribution of load among satellites. In order to perform load distribution among satellites, we focus on the multi-layered Satellite Network that are constructed by layering Non-Geo Sationnary satellite networks. In these multi-layered satellite networks, various traffic path are used as detour path, and therefore the distribution of load among satellites is made possible. In this paper, we propose a routing control method which realizes a sufficient distribution of load among satellites in a multi-layered satellite network. Finally, we evaluate the performance of our proposed method through simulation.

  57. A New Proposal of Ubiquitous Broadband Networks Relying on PON and WiFi/WiMAX

    NISHIYAMA Hiroki, KATO Nei, UJIKAWA Hirotaka, SUZUKI Ken-Ichi, YOSHIMOTO Naoto

    Technical report of IEICE. CQ 112 (10) 53-58 2012/04/12

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    In this technical report, the authors present a new aspect of ubiquitous broadband networks relying on Passive Optical Network (PON), Wireless Fidelity (WiFi), and Worldwide Interoperability for Microwave Access (WiMAX).

  58. A study on the packet list structure for Layer-3 Diversity Switch

    MIZUTANI Tadao, NISHIYAMA Hiroki, NAKAHIRA Katuya, SUGIYAMA Takatoshi, KATO Nei

    Technical report of IEICE. SAT 111 (437) 19-24 2012/02/16

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    In recent years, public wireless LAN service for trains has advanced significantly in Japan. Contemporary approaches to provide Internet connection to trains have used WiFi technology. To facilitate wide area Internet connectivity satellite communication has received significant attention. However, satellite communication suffers from frequent signal cutoffs due to the existence of obstacles. To solve this issue, a combination of layer-3 diversity with gap filer has been proposed. Layer-3 diversity is a method by which the same packet is received by multiple inputs and the most appropriate packet is selected. In layer-3 diversity, packet-matching processing is required and this processing is performed with a dedicated device called a layer-3 diversity switch. This processing may result in a bottleneck for high bandwidth communications. This paper focuses on the packet list structure that this dedicated device holds, and we propose a method to reduce the packet-matching processing time by decentralized administration of the packet list structure. Experimental results show the advantages our proposed method.

  59. A study on the packet list structure for Layer-3 Diversity Switch

    MIZUTANI Tadao, NISHIYAMA Hiroki, NAKAHIRA Katuya, SUGIYAMA Takatoshi, KATO Nei

    111 (437) 19-24 2012/02/09

  60. Characterization of Packet Losses and Delays in Multi-Layered Satellite Networks Over an Efficient Routing Scheme

    TADA Yuta, NISHIYAMA Hiroki, YOSHIMURA Naoko, KATO Nei

    Technical report of IEICE. SAT 110 (256) 107-111 2010/10/21

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Multi-layered satellite networks, which integrate multiple satellite constellations having different orbits, have attracted much attention as a promising next generation satellite network for facilitating ubiquitous communications. In this paper, we focus on double-layered satellite networks integrating Low Earth Orbit (LEO) and Medium Earth Orbit (MEO) satellites network systems. Previously, we proposed an efficient routing scheme, which properly distributes traffic between these two layers. However, the characterization of packet losses and delays was not addressed in that work. Since this is an important aspect in verifying the effectiveness of our recently proposed routing scheme, in this paper, we evaluate the performance of the proposed scheme in terms of packet losses and delays in detail. In addition, we describe further improvements of the proposed scheme.

  61. B-6-61 A Study on the Load-Balanced Server Selection for Content Delivery Network

    Furuya Kai, Nishiyama Hiroki, Kato Nei, Yamada Hiroshi, Yada Takeshi, Nomura Hiroto

    Proceedings of the Society Conference of IEICE 2010 (2) 61-61 2010/08/31

    Publisher: The Institute of Electronics, Information and Communication Engineers

  62. A Study of Retransmission Control of Transport Protocol Supported by Network Nodes in Wireless Networks with Long Delay

    IKEDA Yoshihiro, NISHIYAMA Hiroki, KATO Nei

    IEICE technical report 110 (136) 103-108 2010/07/15

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    With the development of satellite network technology, satellite networks have become widely utilized for many communication applications, thus, the reliability of the Transmission Control Protocol (TCP) has become ever more essential. However, it is commonly known that the performance of TCP will significantly decreases in wireless networks that have long transmission delay, such as satellite networks. Even though some improvements in TCP have already addressed these problems in previous works, we focus on the Variable-structure congestion Control Protocol (VCP) which is designed for High Bandwidth Delay Product (BDP) networks. VCP allows the sender to control the congestion window efficiently by using Explicit Congestion Notification (ECN) which conveys congestion information that originates from the routers. However, the performance of VCP degrades in wireless networks because of the inefficient retransmission control. In this paper, we propose two methods that improve retransmission control. The first method is based on the use of ECN ,while the other utilizes Round Trip Time (RTT), to estimate network condition. Finally, we also evaluate the effectiveness of the proposed schemes by the use of computer simulation.

  63. A Study on an Efficient Route Control Method for Two-Layered Satellite Networks

    TADA Yuta, NISHIYAMA Hiroki, YOSHIMURA Naoko, KATO Nei

    IEICE technical report 110 (73) 45-50 2010/06/03

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Non-Geostationary (NGEO) satellite networks provide many advantages in terms of extensive coverage, efficient power consumption, and instantaneous access. Because of these benefits, NGEO satellite networks have received increasing attention as a means to provide a next generation, high-speed wireless network that is globally available. The latest research in this field has been focused on increasing the efficiency of wireless communications. Multi-Layered Satellite Networks are constructed as multiple layers of NGEO satellite networks. With the efficient management of each layer's network resources, degradation in the quality of service can be reduced and the network capacity can be increased. In order to achieve these benefits, it is necessary to control the amount of traffic in each network layer. In this paper, we propose a routing control method which distributes each layer's traffic appropriately within the two-layered satellite network. We evaluate the performance of our proposed method through simulation.

  64. On the Effect of Mobility on Reliable Topology Control in Ad-hoc Networks

    DUC THUAN Ngo, NISHIYAMA Hiroki, KATO Nei

    IEICE technical report 109 (448) 67-70 2010/02/25

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Topology control is considered as an efficient method to decrease the interference and energy consumption in ad-hoc networks. Among the localized algorithms for topology control, Local Tree-based Reliable Topology (LTRT) has been proposed as an approach that satisfies the requirements of both energy saving and reliability. However, until now, only static networks have taken advantage of this algorithm, and thus, an experiment that adopts LTRT to mobile networks is becoming necessary. In this paper, we measure the effects of mobility on the connectivity of networks whose topology is constructed by LTRT and other well-known algorithms. The results show that topology produced by LTRT is sensitive to mobility, but in terms of connectivity, LTRT shows superiority to the other algorithms.

  65. A Study of Connectivity-Based Node Clustering for Wireless Sensor Networks

    FUKABORI Tetsushi, NAKAYAMA Hidehisa, NISHIYAMA Hiroki, KATO Nei

    IEICE technical report 109 (435) 53-58 2010/02/22

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    In wireless sensor networks (WSNs), nodes, equipped with sensors and wireless communication devices, are scattered and they build autonomous-decentralized networks. We can collect sensed data of these nodes from the networks. Since nodes are battery-driven devices, the restraint of power consumption is a main concern in WSNs. As an approach, WSNs with mobile sinks are now attracting much attention. A mobile sink (e.g. robots) travels around a network and collects data of the neighboring sensor nodes, and thus, it can prolong network lifetime by power-saving communication with each node. A WSN is divided into multiple clusters, which a mobile sink visits one-by-one. Therefore, a clustering algorithm which optimizes the entire power consumption is important. In this paper, we study a clustering algorithm which takes into account the connectivity between each node.

  66. A Study on the Distributed Access Control in Cognitive Radio

    KONNO Isao, NISHIYAMA Hiroki, KATO Nei

    IEICE technical report 109 (340) 19-24 2009/12/10

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Due to the lack of available frequency spectrum, cognitive radio technologies have recently attracted attention because of their potential to achieve high efficient utilization of wireless bandwidth resources. Cognitive radio technologies promote the secondary utilization of spectrum bands when not in use by a primary system. In such cognitive radio technologies, spectrum management is an essential issue. We focus on Hardware-Constrained cognitive MAC(HC-MAC)which is an applicable in ad hoc environment. In this paper, we treat satellite networks as a primary system. We propose a distributed access control scheme which for cognitive radio users on the ground, using the same frequency bands as satellite networks.

  67. Efficient Usage of Bandwidth on the Satellite and Ad Hoc Network

    HONDA Manabu, NISHIYAMA Hiroki, KATO Nei

    IEICE technical report 109 (254) 131-134 2009/10/22

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Satellite network and mobile ad hoc networks (MANETs) are expected to evolve as new communication methods due to the fact that they do not depend on fixed infrastructures. In this paper, we propose a scheme which combines ad hoc networks with satellite networks. In particular, we focus on the connection environment between the ground mobile nodes and the satellites. Our purpose is to utilize the bandwidths of the satellites more efficiently using ad hoc networks. We mainly deal with the situation whereby ground users are unable to use their respective bandwidths to the satellite because of the limitation pertaining to the excessive number of simultaneous connections with the satellite.

  68. Hot Research Topics and Attempts for Practical Applications on Ad Hoc Networks

    KATO Nei

    IEICE technical report 109 (246) 95-102 2009/10/15

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Ad hoc networks area has been extremely active during recent years. In this presentation, an overview of ad hoc networks researches is given with special emphasis to current status and future trend in terms of routing and security. The presenter will introduce several researches being engaged in Tohoku University and shows a practical application of monitoring system for Nordic walking based on ad hoc and sensor networks.

  69. A Study on Certificate Revocation of Malicious Node for Mobile Ad Hoc Networks

    PARK Kyul, NISHIYAMA Hiroki, KATO Nei

    IEICE technical report 109 (188) 37-42 2009/09/03

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Mobile Ad Hoc NETworks (MANETs), in which nodes can freely join and move, need an abillity to protect itself against attacks launched from malicious nodes. Within the node certificate system, the most effective technique for protecting the MANETs is the prompt revocation of malicious nodes. One way of the revocation certification of identified attackers is to collect the information about the attackers from multiple nodes and remove their certification based on the collected information. However, it is difficult to determine whether the collected information is reliable or not. In this paper, we propose a certificate revocation scheme which can achieve high performance even in the situation with unreliable information by classifying and clustering nodes based on their reliability. We also evaluate the performance of the proposed method by using network simulator.

  70. ABS-1-4 Improving TCP Fairness among Users over IEEE 802.11 DCF

    Kashibuchi Kenichi, Kato Nei

    Proceedings of the Society Conference of IEICE 2009 (1) "S-7"-"S-8" 2009/09/01

    Publisher: The Institute of Electronics, Information and Communication Engineers

  71. Performance Evalution of TCP over Hybrid Satellite/MANET Networks

    SILVA Daniel, NISHIYAMA Hiroki, KATO Nei

    IEICE technical report 109 (73) 35-38 2009/07/02

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    While satellite network and Mobile Ad hoc NETwork (MANET) are completely different networks, the integration between these networks has large potential to provide Internet access anywhere on the earth. However, an obvious issue exists in such hybrid satellite/MANET networks. The performance of Transmission Control Protocol (TCP), de-fact standard protocol in Internet, can be largely degraded in such hybrid environments due to long propagation delay, frequent connection breaks, and wireless link errors. In this paper, we evaluate the performance of TCP over hybrid networks, mainly from the point of view of throughput.

  72. A Study on the Attack and Failure Tolerance of Efficient and Scalable Network Model

    FURUYA Kai, NISHIYAMA Hiroki, KATO Nei

    IEICE technical report 109 (116) 91-96 2009/06/25

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    The emerging P2P (Peer to Peer) model has become more powerful and attractive as a network model for sharing of the Internet resources and streaming media contents than the conventional client/server model due to its scalability and distributed feature. While P2P network is tolerant to failures, it is vulnerable to attacks enomously. That is because that the P2P network has scalefree distribution. In this paper, we propose a bimodal P2P network, which follows bimodal degree distribution. The proposed method achieves high tolerance to both attacks and failures through the simulation.

  73. A study on transport protocols in wireless networks with long delay

    IKEDA Yoshihiro, NISHIYAMA Hiroki, KATO Nei

    IEICE technical report 109 (72) 23-28 2009/05/27

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    While Transmission Control Protocol (TCP) is the most famous transport protocol in terrestrial networks, its performance is not enough in wireless networks with long delay, e.g., satellite networks. Though some improvements of TCP and new transport protocols have been proposed, we focus on Variable-structure congestion Control Protocol (VCP) designed for high Bandwidth Delay Product (BDP) networks. In VCP, Explicit Congestion Notification (ECN) is used to generate the feedback signal from routers to sources in order to notify the utilization ratio of a bottleneck link. VCP controls its congestion window according to the network traffic conditions. Thus, VCP is able to achieve high link utilization even in high BDP networks. However, there are two major issues in VCP. One is the lower rate of increase in congestion window than the slow start in TCP. The other is the throughput degradation in lossy wireless environments especially those with long transmission delay. In this paper, to cope with these issues, we propose a VCP improvement which quickly increases its congestion window in start-up and maintains high throughput in wireless environments. We also evaluate the performance of the proposed scheme by computer simulation.

  74. B-6-126 Improving TCP Uplink/Downlink Fairness in IEEE 802.11 DCF

    Kashibuchi Kenichi, Kato Nei

    Proceedings of the IEICE General Conference 2009 (2) 126-126 2009/03/04

    Publisher: The Institute of Electronics, Information and Communication Engineers

  75. A Routing Algorithm to Handle the Hotspot Problem in Wireless Sensor Networks

    GIANG Do Van, KASHIBUCHI Kenichi, NISHIYAMA Hiroki, KATO Nei

    IEICE technical report 108 (457) 159-164 2009/02/24

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    In wireless sensor networks, maximizing the lifetime of the networks is a fundamental problem because of the limited electric power of the battery embedded on sensor nodes. To extend a network lifetime, it is necessary to study power consumption for data transmission in each sensor node. As a routing algorithm has a large affect on the energy consumption in each node, many power-aware routing algorithms have been proposed. However, almost all algorithms have not taken the effect of hotspot problem into account. Hotspot problem is the issue that sensor nodes around a sink node rapidly consume their battery due to heavy traffic from other outside nodes, which causes the isolation of the sensor network and prevents the sink node from gathering data from the sensor nodes. In this paper, we focus on the hotspot problem in wireless sensor networks and propose a routing algorithm to extend the network lifetime.

  76. B-3-24 Performance evaluation of a load balancing method in multi-layered satellite networks

    Kudoh Daigo, Nishiyama Hiroki, Kato Nei

    Proceedings of the Society Conference of IEICE 276-276 2009

    Publisher: The Institute of Electronics, Information and Communication Engineers

  77. A Distributed Feedback Mechanism for an Efficient Distribution of Traffic in Hierarchical Mobile IPv6 Networks

    IKEDA Yuji, TALEB Tarik, HASHIMOTO Kazuo, NEMOTO Yoshiaki, KATO Nei

    IEICE technical report 106 (236) 83-88 2006/09/07

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    In next-generation mobile communication systems, quality of service (QoS) provisioning is vital. Hierarchical Mobile IPv6, which is an efficient routing method in wireless environments, introduces Mobility Anchor Point (MAP) to manage the location information of MNs so that handoff delay caused by switching base stations can be reduced. However, the more MNs exist in a wireless network, the higher load the MAP has to process. Therefore, a mechanism for multi-layered placement and selection of MAPs is needed. This paper proposes an approach for efficient selection of MAPs. In the proposed method, MAPs are selected in a way that the variance of all MAPs' loads is minimized. Simulation results show that the proposed method maintains an efficient distribution of the network load and reduces the handoff delay of MNs.

  78. A TCP-based congestion avoidance approach with priority control

    NISHIYAMA Hiroki, TALEB Tarik, HASHIMOTO Kazuo, NEMOTO Yoshiaki, KATO Nei

    IEICE technical report 106 (236) 157-162 2006/09/07

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Along with rapid growth of broadband access networks, it has become possible to transfer a large files such as music, high-quality images, and videos on the Internet. TCP/IP is widely used for data transmission in the Internet because it provides highly reliable communication. However, TCP results in drastically unfair bandwidth allocations among competing flows and causes heavy network congestion when multiple connections share the bandwidth of a bottleneck link. In this regard, this paper addresses the efficiency and fairness issues of TCP. The efficiency of TCP is controlled by matching the aggregate traffic rate of all flows to the sum of the network capacity. On the other hand, its unfairness issue is mitigated by allocating portions of bandwidth proportional to flow's RTTs. In addition, a priority control mechanism is also introduced to the proposed scheme.

  79. Proposal and evaluation of a routing protocol for VANET using mobile velocity vector

    OCHI Mitsuru, TALEB Tarik, JAMALIPOUR Abbas, KATO Nei, NEMOTO Yoshiaki

    IEICE technical report. Communication systems 105 (280) 79-84 2005/09/15

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Inter-Vehicular communications (IVC) in urban areas represent an integral part of future ubiquitous networking. Recently, several routing protocols have been proposed for communication over Vehicle Ad-hoc Networks (VANETs). One of the major issues in VANET networks is related to the throughput degradation due to frequent link breakage events. In this paper, we propose an efficient protocol that reduces the frequency of link ruptures. For this purpose, the proposed scheme uses the velocity vector of vehicles to select stable and reliable routes for inter-vehicular communications. The performance of the scheme is compared to that of some well-known routing protocols and its efficiency is confirmed by simulation results.

  80. A Proposal for Improvement of communication efficiency with Dynamic Domain-Based Method in Mobile Network : Selection of Optimal MAP based on MAP load transition estimation

    SUZUKI Tasuku, KATO Nei

    IEICE technical report. Information networks 104 (514) 43-48 2004/12/17

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Owing to the rapidly growing mobile networks of the recent years, and its high demand in seamless communication, Mobile IPv6 is getting a lot of attention. However, longer the distance between the home agent (HA) and the mobile node (MN), more is the handover delay which causes communicative failure and, therefore, is a serious problem. In order to improve it, Hierarchical Mobile IPv6 (HMIPv6) is proposed. Nevertheless, with the increase in the amount of traffic, concentration of load occurs at the mobility anchor point (MAP). In our proposal, we propose a method of choosing a higher level router as MAP dynamically by judging the state of the network. We compare our proposal with the conventional method from the viewpoint of distribution of load, delay of packet delivery and packet loss, and show its validity.

  81. SB-4-1 A Note on Network Feature Extraction for Anomaly Detection

    WAIZUMI Yuji, SATO Yohei, KATO Nei, NEMOTO Yoshiaki

    Proceedings of the IEICE General Conference 2004 (2) "S-27"-"S-28" 2004/03/08

    Publisher: The Institute of Electronics, Information and Communication Engineers

  82. Applying a Construction of Subspace Method to Compound Mahalanobis Function

    MIYAKOSHI Ryuichi, NAKAYAMA Hidehisa, WAIZUMI Yuji, SUZUKI Masato, KATO Nei, NEMOTO Yoshiaki

    Technical report of IEICE. PRMU 103 (659) 131-136 2004/02/13

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    In order to discriminate similar characters with high precision,it is necessary to use the subspace in which the difference between the two characters is most evident.Compound Mahalanobis Function (CMF) is one of the effective function for discerning similar characters.In CMF,the subspace in which the difference between the two characters is most evident,consist of the direction of the eigen vector which correspond to the smallest value calculated from the covariance matrix of the target category.And the correction of Mahalanobis distance is calculated from the correction value calculated from this subspace.However,in the subspace in which the difference between the two charactersis most evident,vectors that do not correspond to the smallest eigen value also exist.CMF dose not create the most suitable subspace since it does not consider the distribution of the similar categories,which are opposites of the target categories.Therefore in this paper,we propose a method in which the subspace is selected so that the Fisher ratio is maxirnumuand inthis method the characteristics are selected from the distribution of both categories using canonical discriminant met hod. Experiments were carried out using similar pairs of characters in the handwritten character databese ETL9B,proposed method achieved a recognition accuracy higher than that of the current CMF.

  83. Proposal of Tracing DoS Attacks Method Based on Traffic Analysis Using AR Model

    UCHIYAMA Yuichi, WAIZUMI Yuji, KATO Nei, NEMOTO Yoshiaki

    Proceedings of the Society Conference of IEICE 2003 (2) 234-234 2003/09/10

    Publisher: The Institute of Electronics, Information and Communication Engineers

  84. Automatic Satellite Image Segmentation Using Topology of Data

    OKADA Yukimasa, WAIZUMI Yuji, KATO Nei, NEMOTO Yoshiaki

    Technical report of IEICE. PRMU 102 (707) 7-12 2003/03/06

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    In this paper, we propose a method for an automatic satellite image segmentation, which utilizes data distribution patterns in multi-dimensional feature space, cloud pixels in particular. The algorithm of the proposed method mainly consists of k-means method and Competitive Hebbian Learning to preserve a topology of data in the feature space. To demonstrate a validity of the proposed method, we apply several satellite image data to the method. The result clearly shows that extraction of cloud pixels is possible with high accuracy. In addition, our proposed method identifies high and low cloud pixels, and snow pixels in satellite image data.

  85. An Optimized Scheme to Select Servers over Global Network

    Utsue Kouta, Waizumi Yuji, Ohta Kohei, Kato Nei, Nemoto Yoshiaki

    Proceedings of the IEICE General Conference 2003 (2) 330-330 2003/03/03

    Publisher: The Institute of Electronics, Information and Communication Engineers

  86. D-12-46 Automatic Satellite Image Segmentation Using Data Correlations

    Okada Yukimasa, Waizumi Yuji, Kato Nei, Nemoto Yoshiaki

    Proceedings of the IEICE General Conference 2003 (2) 207-207 2003/03/03

    Publisher: The Institute of Electronics, Information and Communication Engineers

  87. Training Data Selection and Recognition Accuracy for Analogous Handwritten Characters using unsupervised SVM

    Shinohara Sanae, Waizumi Yuji, Kato Nei, Nemoto Yoshiaki

    Proceedings of the IEICE General Conference 2003 (2) 192-192 2003/03/03

    Publisher: The Institute of Electronics, Information and Communication Engineers

  88. On TCP Performance over Multi-Hops Satellite Constellations

    TALEB Tarik, KATO Nei, NEMOTO Yoshiaki

    Technical report of IEICE. SAT 102 (360) 27-32 2002/10/04

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    TCP is the most widely used transport protocol on today's Internet. A large part of its success is due to its ability to probe for unused bandwidth while also backing off its transmission rate upon detection of network congestion. Despite the fact that several mechanisms have been presented in recent literature to improve TCP, there remain some vexing attributes that impair TCP's performance. In this paper, we address the issue of the efficiency and fairness of TCP in multi-hops satellite constellations. We mainly focus on the effect of the change in flow count on TCP behavior. In case of handover occurrence, a TCP sender may be forced to share a new set of satellites with other users resulting in a change of flow count. Our work argues that the TCP rate of each flow should be dynamically adjusted to the available bandwidth when the number of flows, competing for a single link, changes over time. We show through simulations that our fair share scheme improves fairness by guaranteeing a fair progression in window size for each flow, decreases the number of losses, and makes better utilization of the bottleneck link.

  89. Bottleneck detection using RTT and its application towards server selection

    UTSUE Kouta, WAIZUMI Yuji, OHTA Kohei, KATO Nei, NEMOTO Yoshiaki

    IEICE technical report. Communication systems 102 (353) 77-82 2002/10/01

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Contents available in the Internet have been increasing in recent years. In flowing all this data through the Internet, bottlenecks leads to impair performance. In this paper, we propose a method to detect the occurrence of a bottleneck between a user and a server as well as to determine the location of that bottleneck. Using information concerning the location of the bottleneck, we may detremine the group of servers affected by that bottleneck. In server seletoin process, our proposed server selecting method is enabled to have more effcient processing using information of the groupe of servers.

  90. Network Anomaly Detection using Statistical Clustering Method

    OIKAWA Tatsuya, WAIZUMI Yuji, OHTA Kohei, KATO Nei, MEMOTO Yoshiaki

    IEICE technical report. Communication systems 102 (353) 83-88 2002/10/01

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    In network management, it is important to be able to detect anomalous events such as illegal entries and hardware breakdowns. Much attention in the past has been given to research providing this detection capability, such as IDS. This previous research is based upon misuse detction methods, however, such methods become ineffective against unprofiled ways of illegal entry. In addition, host-based methods of network management provide a smaller protection coverage, furthermore, network-based methods offer the same result as well. In this paper, we apply the anomaly detection method onto network conditions. A model of the network condition is created and this method is applied onto that framework in order to determine whether that network condition is either anomalous or normal. To prove the validity of the method, this method is then applied to the trace data of actual network traffic.

  91. Proposal of tracing DoS attacks by comparing traffic patterns using Quadratic programming method

    SAKAGUCHI Kaoru, WAIZUMI Yuji, OHTA Kohei, KATO Nei, NEMOTO Yoshiaki

    IEICE technical report. Communication systems 101 (356) 15-22 2001/10/11

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    DoS(Denial of Service) attacks represent one of the hardest security problems on the Internet. It is important to determine the source generating the attacks. However, as attackers generally disguise their locations using incorrect IP source addresses, it is very difficult to find out the attacking source. One of the used tracing techniques is to investigate the fluctuations of traffic(traffic pattern), then to compare among the sampled traffic patterns. But in case of DDoS(Distributed DoS), this technique isn't effective. In this paper, we first investigate the problem. We then propose a tracing technique based on the process of comparing the patterns as a Quadratic programming problem.

  92. Tracking DoS Attacks in High Speed Networks : A Technology for Suppressing and Destroying IIIegal Access.

    KANAMARU Akira, OHTA Kohei, KATO Nei, NEMOTO Yoshiaki

    The Journal of the Institute of Electronics,Information and Communication Engineers 84 (10) 727-729 2001/10/01

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5693

  93. A proposal of detecting wide area illegal access by distributed NIDS

    ABURAKAWA Ryouta, OHTA Kohei, KATO Nei, NEMOTO Yoshiaki

    IEICE technical report. Communication systems 101 (291) 49-54 2001/09/07

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    In order to take proactive action against illegal access in the Internet, detecting the precursors is extremely important. Many "scan" s are running everywhere and anytime in networks for collecting information of targets. To avoid any IDSs, those are carried out in many networks, in at long intervals and at random order. Therefor, IDS deployed for a local network is considered to be lack of information to capture the big picture of scan. As a result, it is difficult to detect them quickly and accurately. In this paper, we propose a collaborative IDS for detecting wide area illegal access, and show the quickness and accuracy in scan detection.

  94. Tracing DoS attacks by comparing traffic patterns using Quadratic programming method

    Sakaguchi Kaoru, Waizumi Yuji, Ohta Kohei, Kato Nei, Nemoto Yoshiaki

    Proceedings of the Society Conference of IEICE 2001 (2) 230-230 2001/08/29

    Publisher: The Institute of Electronics, Information and Communication Engineers

  95. Generation of Learing Patterns Using Nonlinear Normalization

    Ebisawa Noriyuki, Waizumi Yuji, Kato Nei, Nemoto Yoshiaki

    Proceedings of the IEICE General Conference 2001 (2) 179-179 2001/03/07

    Publisher: The Institute of Electronics, Information and Communication Engineers

  96. A Study On Application Methods of Quadratic Compound Functions to Multi-Categories

    SUZUKI Masato, KATO Nei, NEMOTO Yoshiaki, ICHIMURA Hiroshi

    Proceedings of the IEICE General Conference 2001 (2) 180-180 2001/03/07

    Publisher: The Institute of Electronics, Information and Communication Engineers

  97. Dynamic Server Selection Method with Consideration about Fluctuation of Traffic and its Evaluation

    MAKABE Satoru, OHTA Kohei, KATO Nei, MANSFIELD Glenn, NEMOTO Yoshiaki

    IEICE technical report. Communication systems 100 (302) 173-178 2000/09/15

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    The server mirroring technique that dispersing contents in more than one network organization is being used widely. This is to avoid access concentration to the server from the increase of the Internet user. In such a case, route to each server is different to every user. And network condition changes by the time. So the technique that the server which is always the most suitable is chosen becomes necessary in consideration of the network traffic. In this paper, server selection method is proposed. The technique that server selection uses information when contents are transfered. They consider a change in the various loads caused by the time progress. Then the evaluation that the information measured over the actual network is applied to the proposal technique is done. We show its validity.

  98. Dynamic Server Selection in Throughput Fluctuation Environment

    MAKABE Satoru, OHTA Kohei, KATO Nei, MANSFIELD Glenn, NEMOTO Yoshiaki

    Proceedings of the Society Conference of IEICE 2000 (2) 169-169 2000/09/07

    Publisher: The Institute of Electronics, Information and Communication Engineers

  99. High Accuracy Handwritten Character Recognition using Error Back Protagation Considering Quantity of Updating Weights

    Waizumi Yuji, Kato Nei, Nemoto Yoshiaki

    Proceedings of the Society Conference of IEICE 2000 201-201 2000/09/07

    Publisher: The Institute of Electronics, Information and Communication Engineers

  100. Classification of satellite image regions by using classified history in local feature space

    OZAWA Noriaki, KATO Nei, NEMOTO Yoshiaki

    Proceedings of the Society Conference of IEICE 2000 188-188 2000/09/07

    Publisher: The Institute of Electronics, Information and Communication Engineers

  101. Proposal of dynamic bandwidth allocation technique for realtime communication and its evaluation by using CBQ

    NAKAMURA Shunsuke, OHTA Kohei, KATO Nei, NEMOTO Yoshiaki

    IEICE technical report. Information networks 100 (208) 55-60 2000/07/24

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Recently, traffic of realtime communication such as video streams or IP telephony increases rapidly in the Internet. The communication with low delay, low jitter are required for these services. Therefore, attentions to CoS(Class of Service) which using priority aggregated traffic by application and so on have been paid. The communication with CBQ(Class Based Queueing) is one of the means to realize CoS to control bandwidth in high precision. But because of the bandwidth control at congestion phase, the delay and jitter increase, so it influences realtime communication. In this paper we propose an useful technique to avoid the un-necessary control by changing dynamically bandwidth allocation of CBQ corresponding to traffic fluctuation. We show it can decrease the delay and jitter by experiment using actual system.

  102. Internet Server Selection

    KAMIYA Hajime, OHTA Kohei, KATO Nei, NEMOTO Yosiaki

    The Journal of the Institute of Electronics, Information, and Communication Engineers 83 (3) 235-236 2000/03/25

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5693

  103. Design and Construct of Packet Capture System with Address Scrambling

    KANAMARU Akira, OHTA Kohei, KATO Nei, Mansfield Glenn, NEMOTO Yoshiaki

    Proceedings of the IEICE General Conference 2000 (2) 129-129 2000/03/07

    Publisher: The Institute of Electronics, Information and Communication Engineers

  104. Dynamic Server Selection by Using Observed Information of Traffic

    MAKABE Satoru, OHTA Kohei, KATO Nei, MANSFIELD Glenn, NEMOTO Yoshiaki

    Proceedings of the IEICE General Conference 2000 (2) 231-231 2000/03/07

    Publisher: The Institute of Electronics, Information and Communication Engineers

  105. A study of realtime communication over IP network with CBQ

    NAKAMURA Shunsuke, OHTA Kohei, KATO Nei, NEMOTO Yohsiaki

    Proceedings of the IEICE General Conference 2000 (2) 172-172 2000/03/07

    Publisher: The Institute of Electronics, Information and Communication Engineers

  106. RMON Based Network Management : Current Status and Future Directions.

    KANAMARU Akira, KATO Nei, NEMOTO Yoshiaki

    The Journal of the Institute of Electronics,Information and Communication Engineers 83 (1) 46-49 2000/01/25

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5693

  107. A study on the Globa1 Intrusion Detection System using Access Tree and Distributed NIDS

    ABURAKAWA Ryouta, OHTA Kohei, KATO Nei, MANSFIELD Glenn, NEMOTO Yoshiaki

    Proceedings of the Society Conference of IEICE 114 114-114 2000

    Publisher: The Institute of Electronics, Information and Communication Engineers

  108. A Intrusion Detection and Trace using the Traffic Pattern

    TAKEI Yohsuke, OHTA Kohei, KATO Nei, MANSFIELD Glenn, NEMOTO Yoshiaki

    IEICE technical report. Information networks 99 (436) 37-42 1999/11/18

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Recent years, intrusion and illegal access are getting serious problem in the wide area of Internet. So, many detection systems, called IDS (Intrusion Detection System), are studied and developed. Especially, network-based IDS (NIDS) is focused on the detection of the abnormality in Internet traffic. However, NIDS have a problem to handle the network traffic. High-volume traffic in these days makes the analyze difficult. While, IP spoofing is a problem, which is commonly used to spoof the source address of attacker. This paper proposes two techniques, one is pattern-based abnormality detection, and the other is attacker tracking technique under IP spoofing by cooperation of some detection systems. We mention the detection and tracking algorithm based on the similarity of the traffic patterns, and evaluate them with simulation data which derived from real network traffic.

  109. A Study on Discriminant Method of Similar Characters based on Nonlinear Quadratic Terms

    SUZUKI Masato, KATO Nei, NEMOTO Yoshiaki, ICHIMURA Hiroshi

    Technical report of IEICE. PRMU 99 (448) 221-228 1999/11/18

    Publisher: The Institute of Electronics, Information and Communication Engineers

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    On handprinted chinese character recognition, Compound Mahalanobis Function (CMF) is useful to distinguish a character from their similar characters. CMF extracts characteristic parts of similar characters by using projective space which are determined by eigenvectors with small eigenvalues, but the space has a limit to discriminate between them, because the decision boundary of them is very complicated. In order to estimate the decision boundary, nonlinear conversions are also useful, but a very huge memory spaces are necessary to compute them. In this paper, we propose a new discriminant function, NLCMF - Nonlinear Compound Mahalanobis Function, which is a extension of CMF by using nonlinear projection on the projective space. In recognition experiment with similar characters, most similar characters were recognized correctly by NLCMF.

  110. Acceleration of Recognition System for Handwritten Address by Applying Priority to Address Candidates

    TOKUMOTO Kazutaka, SUZUKI Masato, KATO Nei, NEMOTO Yoshiaki

    Technical report of IEICE. PRMU 99 (448) 229-236 1999/11/18

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    In hand-written address recognition, the precision of both specifying a segmentation position of a character and recognition are not satisfactory, therefore estimating character image by post-processing technique with address dictionary is popular. For precise recognition system, it is important to compare an input image with all address candidates without discrimination. However, a large number of candidates in address dictionary cause an increase of processing time. To cope with this problem, we propose the utilization method of address dictionary to accelerate post-processing. By applying priority to candidates in address dictionary, our proposed method make it possible to decrease a large number of candidates. This paper describes the algorithm and evaluation results.

  111. A study about acceleration of address-recognition by hierarchization of address dictionary

    TOKUMOTO Kazutaka, SUZUKI masato, KATO Nei, NEMOTO Yoshiaki

    Proceedings of the Society Conference of IEICE 1999 187-187 1999/08/16

    Publisher: The Institute of Electronics, Information and Communication Engineers

  112. Improvement of module's construction in Recognition System for Handwritten Characters by Alternative Method using Neural Network

    Ishii Tsutomu, Waizumi Yuji, Kato Nei, Nemoto Yoshiaki

    Proceedings of the Society Conference of IEICE 1999 186-186 1999/08/16

    Publisher: The Institute of Electronics, Information and Communication Engineers

  113. Improvement in Handwritten Character Recognition using Multi Layered Perceptron with Squared Connections

    Waizumi Yuji, Kato Nei, Nemoto Yoshiaki

    Proceedings of the Society Conference of IEICE 1999 185-185 1999/08/16

    Publisher: The Institute of Electronics, Information and Communication Engineers

  114. Evaluation of a Network Fault Detection System based on Proactive Buffering Technique

    KANAMARU Akira, OHTA Kohei, KATO Nei, Mansfield Glenn, NEMOTO Yoshiaki

    Proceedings of the Society Conference of IEICE 1999 (2) 82-82 1999/08/16

    Publisher: The Institute of Electronics, Information and Communication Engineers

  115. The Intrusion Detection System using Traffic Pattern Matching Technique

    TAKEI Yohsuke, OHTA Kohei, KATO Nei, Mansfield Glenn, NEMOTO Yoshiaki

    Proceedings of the Society Conference of IEICE 1999 (2) 86-86 1999/08/16

    Publisher: The Institute of Electronics, Information and Communication Engineers

  116. High Accuracy Recognition for Handwritten Characters using Multi Layered Perceptron with Squared Connections

    WAIZUMI Yuji, KATO Nei, NEMOTO Yoshiaki

    PRMU 99 (182) 37-44 1999/07/16

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    We propose a Multi Layered Perceptron using squared connections. The function of squared connections is calculating square of propagating signal. The proposed model can estimate gaussian distribution using the squared connections between output layer and hidden layer. We demonstrate that the recognition rate of proposed neural network can achieve 97% for recognition of ETL9B database.

  117. An Automatic Clouds Classification Method for Satelite Image using Local Region Clustering

    AOKI Toshinori, OZAWA Noriaki, WAIZUMI Yuuji, KATO Nei, NEMOTO Yoshiaki

    Proceedings of the IEICE General Conference 1999 (2) 141-141 1999/03/08

    Publisher: The Institute of Electronics, Information and Communication Engineers

  118. B-7-70 A Proposal of Network History Management System and its Application to Security Management

    Proceedings of the IEICE General Conference 1999 (2) 179-179 1999/03/08

    Publisher: The Institute of Electronics, Information and Communication Engineers

  119. B-7-138 Integrating Management Information for Network Fault Diagnosis Supporting System

    Proceedings of the IEICE General Conference 1999 (2) 247-247 1999/03/08

    Publisher: The Institute of Electronics, Information and Communication Engineers

  120. Network Fault Isolation based on Adaptive Model Selection Mechanism

    KANAMARU Akira, OHTA Kohei, KATO Nei, MANSFIELD Glenn, NEMOTO Yoshiaki

    Technical report of IEICE. OFC 98 (546) 19-24 1999/01/22

    Publisher: The Institute of Electronics, Information and Communication Engineers

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    In fault management systems for large-scale networks, the traffic monitoring ability and fault isolation mechanism play an important role. In this paper, we estimate the resource requirements for effective traffic monitoring which implements proactive monitoring. we propose a more powerful dynamic symptom aggregation mechanism, for high-level fault diagnosis. We apply the proposed technic to an SNMP based system, and evaluate its result.

  121. A Study On Generating Verious Character Patterns Witj Holograph

    Suzuki Masato, Kato Nei, Nemoto Yoshiaki, Ichimura Hiroshi

    Proceedings of the IEICE General Conference 211-211 1999

    Publisher: The Institute of Electronics, Information and Communication Engineers

  122. Recognition System for Handwritten Characters by Alternative Method using Neural Network

    ISHII Tsutomu, WAIZUMI Yuuji, KATO Nei, NEMOTO Yoshiaki

    Technical report of IEICE. PRMU 98 (489) 55-61 1998/12/17

    Publisher: The Institute of Electronics, Information and Communication Engineers

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    We propose a recognitin sysstem for handwritten characters by alternative method as a fine classification method using neural network. This method simplifies recognition problem to liner separation problem of two classes. In large scale of recognition problem with many categories, the Problem appears, that the enormouse number of modules are created due to the enomouse number of combination of categories. However, dynamic learnign in recogntion is posible because each module's learning spped is high. The dynamic learning is able to decrease the number of created modules, so that it could be applied to the learge scale recognitin system. We showed that this method could realize at fine recognitin rate with ETL9B database of handwritten characters.

  123. High Accuracy Recognition System for Handwritten Characters using HLVQ and ELNET

    WAIZUMI Yuji, SARUTA Kazuki, KATO Nei, NEMOTO Yoshiaki

    Technical report of IEICE. PRMU 98 (489) 63-70 1998/12/17

    Publisher: The Institute of Electronics, Information and Communication Engineers

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    We propose a new recognition system for handwritten characters using neural networks. The proposed system consists of two classification stages. The first stage, rough classification stage, uses HLVQ whose fearure is high speed classification. And as the second stage, fine classification stage, we use ELNET-II. We demonstrate that the proposed system can achieve high accuracy for recognition of ETL9B database.

  124. A Proposal and Experiment of Measuring Metric Information for Server Selection

    KAMIYA Hajime, OHTA Kohei, KATO Nei, MANSFIELD Glenn, NEMOTO Yoshiaki

    IEICE technical report. Information networks 98 (427) 83-88 1998/11/20

    Publisher: The Institute of Electronics, Information and Communication Engineers

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    In today's internet environment, many dispersion technique like mirroring or cache, has been researched and experimented for load-balancing or improving users' efficiency. But to use these technique efficiently, we need to select the best server according to users' environment. In this paper, we examine the metric information for efficient server selection and propose new method for measuring that information, using application log. This method does not generate extra network traffic and can get metric information that reflects users' information retrieval time. We show this by experiment under actual network environment

  125. High Accuracy Recognition of Handwritten Characters by ELNET with Distance Information of Rough Classication

    Waizumi Yuji, Saruta Kazuki, Kato Nei, Nemoto Yoshiaki

    Proceedings of the Society Conference of IEICE 1998 228-228 1998/09/07

    Publisher: The Institute of Electronics, Information and Communication Engineers

  126. Handwritten Address Recognition using Dynamic Abstraction of Character Candidates

    ABE Hiroyuki, SUZUKI Masato, KATO Nei, NEMOTO Yoshiaki

    Technical report of IEICE. PRMU 97 (558) 105-110 1998/02/19

    Publisher: The Institute of Electronics, Information and Communication Engineers

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    In hand-written address recognition, it is diffucult to recognise low quality characters with accuracy. And conventional one-stage post-processing method has limitation when estimating address candidates. In this paper, we propose a two-stage method using dynamic abstraction of character candidates and re-recognition of characters. With making use of connections of segmentation position, this dynamic abstraction method makes it possible to find the correct address condidate even when an image of characeter is not a regular candidate. This paper describes these algorithm and evaluation results.

  127. Construction of Real-time Fault Detection System

    MORI Takumi, OHTA Kohei, KATO Nei, MANSFIELD Glenn, NEMOTO Yoshiaki

    Technical report of IEICE. OFC 97 (494) 31-36 1998/01/22

    Publisher: The Institute of Electronics, Information and Communication Engineers

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    In construction of real-time fault management system, fault detecting ability and low influencee on network and observing machine are two important aspect. In this paper, we propose proactive methods for constructing high quality fault management system, and lowering management resource.

  128. Effective network usage by network configuration information

    KAMIYA Hajime, OHTA Kohei, KATO Nei, MANSFIELD Glenn, NEMOTO Yoshiaki

    Proceedings of the IEICE General Conference 304-304 1998

    Publisher: The Institute of Electronics, Information and Communication Engineers

  129. Improving network service efficiency by learning its log.

    KAMIYA Hajime, OHTA Kohei, KATO Nei, Glenn MANSFIELD, NEMOTO Yoshiaki

    Proceedings of the Society Conference of IEICE 140-140 1998

    Publisher: The Institute of Electronics, Information and Communication Engineers

  130. A method for evaluation of event detection and event handling on event-driven network fault management

    OHTA Kohei, KATO Nei, SONE Hideaki, MANSFIELD Glenn, NEMOTO Yoshiaki

    Proceedings of the Society Conference of IEICE 1997 (2) 141-141 1997/08/13

    Publisher: The Institute of Electronics, Information and Communication Engineers

  131. A Study on Hand-written Address Fine Recognition with Scoring Method

    ABE Hiroyuki, KATO Nei, SUZUKI Masato, NEMOTO Yoshiaki

    Proceedings of the Society Conference of IEICE 1997 203-203 1997/08/13

    Publisher: The Institute of Electronics, Information and Communication Engineers

  132. ストロ-ク情報に基づく手書郵便宛名の切出しと認識

    加藤 寧, 根元 義章

    画像ラボ 8 (8) 42-45 1997/08

    Publisher: 日本工業出版

    ISSN: 0915-6755

  133. High Speed and High Accuracy Rough Classification for Handwritten Characters using Hierarchical Learning Vector Quantization

    WAIZUMI Yuuji, KATO Nei, SARUTA Kazuki, NEMOTO Yoshiaki

    Technical report of IEICE. PRMU 97 (40) 1-8 1997/05/15

    Publisher: The Institute of Electronics, Information and Communication Engineers

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    We propose Hierarchical Learning Vector Quantization(HLVQ) as rough classification method for handwritten characters. HLVQ divides categories in feature space hierarchically in learning procedure. HLVQ adds neurons hierarchically and makes tree whose nodes are neurons. The feature space is divided by a few codebook vectors in each layer. The adjacent feature spaces overlap each other near the borders using window HLVQ possesses both classification speed and accuracy due to the hierarchical architecture and the overlapping technique. By using secondary classification with plural codebook vector for each category under HLVQ, the speed and accuracy of classification by proposed method are higher than that by using average vectors.

  134. A Study on Hand-written Address Recognition with Dynamic Reduction of Character Candidates

    ABE Hiroyuki, KATO Nei, SUZUKI Masato, NEMOTO Yoshiaki

    Proceedings of the IEICE General Conference 1997 (2) 301-301 1997/03/06

    Publisher: The Institute of Electronics, Information and Communication Engineers

  135. A Recognition Method for Handprinted Character by Writing Brush Based on Inference of Stroke Width

    Suzuki Masato, Kato Nei, Nemoto Yoshiaki, Ichimura Hiroshi

    Proceedings of the IEICE General Conference 1997 (2) 313-313 1997/03/06

    Publisher: The Institute of Electronics, Information and Communication Engineers

  136. Network Fault Management by Divide and Conquer Technique : implementation and experiment

    OHTA Kohei, MORI Takumi, KATO Nei, SONE Hideaki, MANSFIELD Glenn, NEMOTO Yoshiaki

    IEICE technical report. Communication systems 96 (505) 7-12 1997/01/31

    Publisher: The Institute of Electronics, Information and Communication Engineers

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    From the perpective of fault management, traffic characteristics contain symptoms of faults in the network. Symptoms of faults aggregate and are manifested in the agrregate traffic characteristics generally observed by a traffic monitor. It is very difficult for a manager or an NMS to isolate the symptoms mainfested in the aggregate traffic characteristics. In this work we present a powerful technique, the divide and conquer technique, wherein symptoms are iteratively isolated from the agrregate observable.

  137. High Speed Rough Classification of Handwritten Characters by Hierarchical Learning Vector Quantization

    Waizumi Yuuji, Saruta Kazuki, Kato Nei, Nemoto Yoshiaki

    Proceedings of the Society Conference of IEICE 1996 365-365 1996/09/18

    Publisher: The Institute of Electronics, Information and Communication Engineers

  138. Devide and Conquer Technique for Network Fault Management on Large-Scale Network

    MORI Takumi, OHTA Kohei, KATO Nei, SONE Hideaki, MANSFIELD Glenn, NEMOTO Yoshiaki

    IEICE technical report. Information networks 96 (97) 57-64 1996/06/17

    Publisher: The Institute of Electronics, Information and Communication Engineers

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    On Large-scale network, there is a large amount of traffic in the backbone network from connected many WANs and LANs. So, network fault management is difficult. In this paper, we introduce the divide and conquer technique to solve the problem automatically and show the result of the experiment of our implementation with RMON-MIB.

  139. A Hand-written Character Recognition System Using TPID

    Suzuki Masato, Kato Nei, Aso Hirotomo, Nemoto Yoshiaki

    Proceedings of the IEICE General Conference 1996 (2) 252-252 1996/03/11

    Publisher: The Institute of Electronics, Information and Communication Engineers

Show all ︎Show first 5

Books and Other Publications 7

  1. 飛躍するドローン 第4章 通信 第2節 長距離高速通信のための中継技術 -WiFi通信機での基礎検討-

    西山 大樹, 加藤 寧

    2016/01

  2. Evolution of Smart Grids

    Zubair Md. Fadlullah, Nei Kato, SpringerBriefs in Electrical, Computer Engineering

    SpringerInternational Publishing 2015/12

  3. 電子情報通信学会 知識ベース 第3群コンピュータネットワーク 第4編トランスポートサービス 第6章RTPとRTCP

    加藤 寧, 西山 大樹

    2014/03

  4. Chapter on Energy-Aware Routing for Wireless Sensor Networks

    Ahmed E.A.A. Abdulla, Hiroki Nishiyama, Nirwan Ansari, Nei Kato

    2013/12

  5. Peer-to-Peer Video-On-Demand in Future Internet

    Mostafa M. Fouda, Zubair Md. Fadlullah, Al-Sakib Khan Pathan, Nei Kato

    CRC Press 2013/01

  6. IEEE Communication Society Multimedia Communications Technical Committee E-Letter

    Toshiaki Ako, Hiroki Nishiyama, Nirwan Ansari, Nei Kato

    2010/09

  7. IEEE Communication Society Multimedia Communications Technical Committee E-Letter

    Nirwan Ansari, Nei Kato

    2009/09

Show all Show first 5

Presentations 1

  1. Advanced Ad Hoc and Mesh Networks Technologies to Facilitate Specialized Disaster-resilient Networks International-presentation

    IEEE TrustCom-14 2014/09/24

Research Projects 24

  1. Beyond 5G時代を支える状況変化適応型Fiber Wireless制御技術

    加藤 寧

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 基盤研究(B)

    Institution: 東北大学

    2021/04/01 - 2024/03/31

  2. Situation-Aware Adaptive FiWi Control Technology for the IoT Era

    Kato Nei

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2018/04/01 - 2021/03/31

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    In this study, we focus on Cloud-Radio Access Networks (C-RANs), which are increasingly being introduced to satisfy various requirements for next-generation wireless access networks. We propose a power-saving control method to stably reduce the power consumption of the entire network even in an environment with time-varying traffic, and confirm the validity of the proposed method through simulation experiments.

  3. Development of Next-Generation Energy Efficient Network with Optical and Wireless Technology Cooperation

    KATO NEI

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2014/04/01 - 2019/03/31

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    Energy saving is considered as one of the requirements in 5G as well as mobile communication networks. Cloud-Radio Access Network (C-RAN), which has attracted attention as a next-generation network architecture, mainly consists of two parts: Remote Radio Heads (RRHs) and BaseBand Units (BBUs). They operate with energy saving scheme but such schemes do not cooperate with each other, thereby increasing the energy consumption of the C-RAN. Therefore, considering both schemes is important to optimize the energy consumption of the C-RAN because of the trade-off between energy saving of RRHs and BBUs. In this study, we propose an energy saving scheme of C-RAN considering both RRHs and BBUs, and confirmed the validity of the scheme.

  4. The big data oriented network: Fusion of physical and virtual based on complex network theory

    KATO NEI

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Challenging Exploratory Research

    Institution: Tohoku University

    2014/04/01 - 2018/03/31

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    Big data analysis that uses and analyzes the vast amounts of data generated on the network and creates innovative services and business models has attracted recent attention. Big data analysis requires efficient use of resources on the entire network to be able to analys access networks, core networks, and data center networks. And practical application of wide area network virtualization technology to optimize the entire network is desired . However, the discussion on wide area network virtualization has just begun, and yet no effective technology has been developed. Therefore, in this research, we developed wide area network virtualization technology based on complex network theory to create big data oriented network which can guarantee required quality of big data analysis.

  5. Research on the performance guarantee of the highly integrated network using gigabits optical lines

    KATO NEI

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2011/04/01 - 2015/03/31

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    In this research, we focus on the Passive Optical Networks (PONs), which have become popular in our daily life. In order to take the advantages of PONs, the future networks are expected to integrate PONs, as the basis, with other types of networks. However, the main issue for the integration of PON and other types of networks is the differences in controlling traffic. Therefore, we proposed a novel traffic control method to solve the problem and validated the performance of the proposal using numerical analysis.

  6. Streaming Content Leakage Detection System for Encrypted Streams

    KATO Nei

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Challenging Exploratory Research

    Institution: Tohoku University

    2010 - 2011

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    Our research group had previously proposed streaming content leakage detection technology based on the fact that different contents exhibit different traffic patterns when they are being delivered over the networks. By comparing traffic patterns obtained near the content server with those measured at egress nodes, these conventional systems are able to detect the stream leakage to the external network. Although our fundamental techniques can be enhanced by adopting an advanced traffic pattern generation algorithm, their robustness to encrypted streams requires further improvements. In order to address this problem, we envision an enhanced mechanism for dealing with encrypted traffic. We also empirically evaluate the performance of the proposed scheme and validate its effectiveness.

  7. Research on Next Generation Multi-Layered Satellite Network Highly Compatible with Internet Protocol

    KATO Nei

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2008 - 2010

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    In this research, we focus on the next generation Multi-Layered Satellite Network (MLSN), which consists of different types of satellite networks. To achieve both efficient utilization of network resources of MLSNs, and to guarantee each user's quality of service, we developed an intelligent routing technology which can effectively distribute traffic load among satellites and layers. The results of performance evaluation based on network simulation show that the proposed scheme can achieve highly efficient network utilization, and mitigate the increase of packet drops and transmission delays.

  8. Research of next generation LEO satellite networks which have high affinity with the Internet

    KATO Nei

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (C)

    Institution: Tohoku University

    2005 - 2007

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    In recent years, a lot of researchers have studied ubiquitous networks that allow all users to access information of any kind at any time, from anywhere. In those networks, LEO (Low Earth Orbit) satellite networks are expected to play a key role, mainly due to their low propagation delay. The purpose of this research is to study fundamental technologies in nest generation LEO satellite networks which have high affinity with the Internet. We researched the four following fundamental technologies as originally planned: 1. LEO satellites communicate directly with ground terminals. Since LEO satellites move quickly, handover occurs frequently and mobility management packets are generated often. As a result, radio resources are wasted. So, we proposed a low-cost mobility management technology based on geographic information and LEO satellite orbit. 2. If TCP/IP is applied to LEO satellite networks, efficiency and fairness are difficult to achieve due to propagation delay and other phenomenon. So we proposed a high efficiency and fairness emphasizing protocol. This protocol enables calculation of a suitable data rate with predicting round trip time by satellite hop counts. 3. To propose a security technology on LEO satellite networks, we proposed a scheme that reduces the impact of routing attack on ad-hoc networks. We need to extend this scheme for LEO satellite networks in the future. 4. We proposed a traffic control scheme that enables neighboring satellites to explicitly exchange information on their congestion status. In this scheme, traffic load is distributed so as not to concentrate it on any certain satellite. The above proposed schemes serve as a foundation for the next generation LEO satellite network system, and will contribute largely to the implementation of a seamless network environment. Therefore, the purpose of this research was accomplished.

  9. Construction of A Network Security System based on Active Collection of Illegal Access Information

    NEMOTO Yoshiaki, KATO Nei, WAIZUMI Yuji

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2004 - 2005

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    It is important to early detect a novel illegal access for network security. In order to early detect the access, we developed some anomaly detection techniques which can detect unknown attacks, an early detection technique based on contents similarity of communication and an extracting method of characteristic information of illegal accesses. On the anomaly detection, we proposed three anomaly detection methods based on our analysis of state change of network traffic when illegal accesses occurred, and achieve the world's highest level of detection accuracy using benchmark database. We also developed a distributed early detection system of diffusion of computer viruses. The detection system uses the traffic occurred which the computer viruses copy themselves to many hosts on the Internet when they diffuse. The system adopts a similarity evaluation method for communication contents using histogram of codes of packet payloads. We confirmed that the system possesses extremely high detection accuracy with very low false positives. Moreover, we developed an automatic signature generation method using virus samples that were detected by the above system from common tokens of the detected viruses. And we discovered that the common tokes can be used to detect subspecies of viruses which can be detected already created signatures.

  10. A Learning Based Illegal Access Detection and Prevention System for Next Generation Network

    KATO Nei, OHTA Kohei

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2003 - 2004

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    Recently, NIDS (Network-based Intrusion Detection System) has played an important role in Internet security system. However, the pattern matching technique used in NIDS is weak for new-type virus or unauthorized access, intentionally evasion act and is not expectable for next generation internet protocol IPv6 equipped with encryption. In this study, we propose a new access detection system which have learning function on subnetwork. Our goal is to develop next generation access detection system which include unknown illegal access detection structure, cooperate with NIDS and adapt to IPv6. In this research, we discussed about DoS (Denial of Service) attack that is difficult to detect in pattern matching technique and developed the system that learn and detect DoS attack This system exploit that the normal access follows the TCP congestion avoidance mechanism and will send test feedback to the source that being suspected of unauthorized access to decrease the transmission rate. By detecting the source's response, we can determine whether it is unauthorized access or not. Furthermore, we develop the software necessary for sharing information of detected unauthorized access among subnet NIDS and neighboring NIDS. This software makes it possible to block the unauthorized access extensively and we construct unauthorized access detection and extermination system combined with detection system. We had performed experiments over real network. As a result, we verified that detection-system is able to detect attack rapidly and accurately and we can realize high detection rate and low false negative rate.

  11. Study on High Accuracy for Historical Character Recognition

    SHIBAYAMA Mamoru, KATO Nei, YAMADA Shoji, KAWAGUCHI Hiroshi, HRA Shoichiro, NAMIKI Mitaro

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    2002 - 2004

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    The aim of this research is to study a high precise recognizing system for historical character recognition by applying the hand written OCR technology, in HCR project. During the research period, the building of historical character database and reconsidering for applying character recognition technology to the historical document with writing brush have been carried out as follows. (1)Character segmentation and normalization : Projection histogram and method of character shape have been studied. And, the column extraction based on the Hough transformation was revised and experimented. (2)Offline character recognition : the coordination between new segmentation method for historical document with writing brush and its recognition was considered. (3)Online character recognition : new online recognizing method for historical characters was studied based on the tablet input which would be effective for retrieving "Kuzushi" character. The electronic dictionary which can be used on Windows PC will be published in 2005. (4)A online retrieval software was developed based on the database of "Kanji Kuzushi-ji Jiten" published by Tokyo-do Publishing Company. (5)As for the character pattern dictionary for recognizing historical characters, 9 databases were released for the public use which can be downloaded from Web site. Homepage for HCR project is http://www.nichibun.ac.jp/shoji/hcr. Also, 2 software programs were opened, GetMoji macro and GetMoji for Web respectively.

  12. Next Generation Automatic Trace Back System for Broad Unlawful Access Based on Time-Series Analysis of Trafic Patterns

    NEMOTO Yoshiaki, OHTA Kohei, KATO Nei

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2002 - 2003

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    Denial of Service (DoS) attack is the threat of an information society and difficult to defense. In order to avoid the damage by the DoS attacks, it is necessary to trace back the attack path because of IP spoofing of attackers hosts. In this research, we proposed a new concept that can overcome the IP spoofing problem, based on Traffic Pattern which is change in packet numbers over time. We first constructed a monitoring system for Traffic Patterns. Then we proposed a new algorithm to detect the DoS attacks and trace back the attack path using Traffic Patterns. The detecting algorithm adopts a predicti6n method and achieves high detection accuracy. And the trace back algorithm is based on quadratic problem which can solve the combinatorial problem among the Traffic Patterns. Our experiments showed that the Traffic Pattern concept can trace back the attack path and overcome the IP spoofing problem.

  13. 不正アクセス監視機能を統合した次世代能動型セキュリティ管理システムの構築

    根元 義章, 太田 耕平, 加藤 寧

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 特定領域研究

    Institution: 東北大学

    2002 - 2002

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    インターネットにおける防犯カメラの役割を果たすIDS(Intrusion Detection System)は、HIDS(host-based IDS)とNIDS(Network-based IDS)に分類される。HIDSはホスト単位での監視を目的とし、ホストに関わる全ての通信やファイルを監視の対象としている。これに対し、NIDSはネットワーク上の通信トラヒックを監視の対象とし、その中の特定のキーワード(シグネチャ)を手掛かりに不正アクセスの有無を判断する。そこで、本研究では、HIDSとNIDSの高度な融合を図り、両者間の情報の相互伝達による不正アクセスの高感度検知及び侵入の足取りを追跡可能な能動型セキュリティ管理システムを提案し、さらに、広域ネットワークにおいてシステムの実装を行い、実用可能なプロトタイプを構築することを目的とした。 今年度では当初の計画通り、分散型NIDSの基本技術を中心に開発を進める一方、HIDSとの連携をも視野に入れた研究開発を行った。具体的には、(1)不正アクセスに関する情報収集、(2)観測システムの構築、(3)分散型NIDSによる高感度な検出システムの開発を行った。まず、(1)では不正アクセス、特に分散スキャンに注目し、情報収集を行いその特徴や対策手法を調査した結果、従来のような単独のIDSではこれらのスキャンに対応することは困難であるという結論に至った。そして、(2)では、ネットワークプローブをLANに設置し、TCPのACK/RSTやICMPパケットといった不正アクセスに関連するパケット群を観測・収集するシステムを構築した。観測システムはフリーソフトであるTCPDUMPやSNORTを利用して構築し、ネットワークの速度に対応できるようにパラメータのチューニングを行った。(3)では、ネットワーク上に分散配置したIDSと、それらを管理するマネージャとを組み合わせた分散型NIDSによる検出システムを構築し、スキャン検出件数および検出時刻の双方において単独のNIDSより高性能であるという結果を得た。

  14. A study of high sensitive illegal access detection system using distributed and cooperative scan detecting method.

    KATO Nei, OHTA Kohei

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2001 - 2002

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    In recent years, networks without sharing the common media come into wide use. The SCAN, a sign of illegal accesses has become very difficult to detect for their crafty trick. In this research, we have proposed a distributed and cooperative manner to detect these SCANs successfully by dispersing the NIDSs on monitoring locations of networks. The simulation of using real networks data showed effectiveness of our proposed method. Comparing the traditional methods, the proposed method can detect SCANs in short time. Furthermore, the proposed method can restrain redundant control messages, so that only small amount of traffic between the manager and NIDSs are needed for managing the system. From these results, we can say this research has achieved its goal.

  15. Organization-defense Style Security System by using Detection of Omens of Illegal Access.

    NEMOTO Yoshiaki, MANSFIELD Glenn, SONE Hideaki, KATO Nei

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2000 - 2001

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    Along with the development of Internet, the detection of illegal access is becoming a major issue. A guarantee of a secure utilization of Internet is very vital for developers. Therefore, the technology of preventing Internet from intrusion and denial of service attacks is in great demand. The typical cases of illegal access are as follows: 1- Penetrating and gaining privileges by illegal measures, then stealing classified information, destroying the system or using it as a stepping-stone for further attacks. 2- Forging the source IP address and sending a large amount of useless traffic. 3- Generating incomplete connections far beyond design limitations of the targeted WWW and DNS server to force it to no longer function. In order to prevent illegal access, the detection of signs of an oncoming attack can be effective. By so doing, we can protect our network system beforehand. In this research, we propose an organization-defense style security system by using the detection of omens (signs) of illegal access. This system detects various network scans that intend to find out vulnerability of remote network nodes. We implemented the system and evaluated its performance on an operating network. Experimental results show the effectiveness of our proposed system.

  16. Developing a Historical Document Analysis System Using Hand-written OCR Techomology

    YAMADA Shoji, UMEDA Michio, KAWAGUCHI Hiroshi, SHIBAYAMA Mamoru, KATO Nei, ISHITANI Yasuto

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: International Research Center for Japanese Studies

    1999 - 2001

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    In this research project, we could obtain the following results. (1) The basic research on the Historical Character Recognition. We examined on some special requirements for the character recognition and segmentation of historical characters. By using a small data set of historical characters, we obtained 95 percents of correct recognition ratio applying Japanese hand-written character recognition technology. We also developed some new technology of segmentation and normalization of historical characters. (2) Historical character database for recognition studies. We made some database to put the study of historical character recognition into progress. The database contain over 250 thousands characters. (3) Interface prototyping of historical document analyzing system. We developed prototype systems of historical document analyzing system. One is a system with a function of presenting correct character candidates of unreadable character using n-gram information. The other is a prototype system of electrical dictionary for historical characters. The dictionary has a function of similar character search, which is an application of hand-written character recognition.

  17. Knowlaedge information analysis of Historical Document Understanding

    YAMADA Shoji, KASAYA Kazuhiko, KAWAGUCHI Hiroshi, SHIBAYAMA Mamoru, KATO Nei, KOJIMA Masami

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: International Research Center for Japanese Studies

    1999 - 2001

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    In this research project, we studied the following four research topics : (1) Structuring the knowledge of Historical Document Understanding, (2) Study of the Historical Chara cter Recognition using our Historical Character OCR dictionary, (3) Developing a Dictionary for Historical Character Recognition, and (4) Developing a proto-type system of a computer ized Historical Character Dictionary (1) We developed a Historical Corpus Database analyzing many loan contracts consists of 1, 300 documents and 243, 000 characters. The common and frequent expressions are extracted from the documents. By using the data, we developed a proto-type of Historical Document Analysis Supporting System using n-gram method. Through an usability test, efficiency of the interface is confirmed statistically. (2) We developed some Historical Character Recognition methods using neural network. (3) Besides the database described in (1), we made another Historical Character Database of "Kuzushi-ji Kaidoku Jiten" published from Tokyoudo Syoten, which is one of the standard dictionary. The dictionary includes 25, 000 characters. (4) We have done some basic studies and have made a proto-type system of portable electrical dictionary, which could be searched by pronunciation, shape, and stroke order.

  18. 重み付き固有値距離を用いた超高精度手書き文字認識システムに関する研究

    加藤 寧

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 奨励研究(A)

    Institution: 東北大学

    1999 - 2000

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    手書き文字認識システムは、音声認識システムと共に、ひとにやさしいマルチメディア情報化社会の実現に重要な役割を担っており、その基礎となる手書き文字認識手法に関わる研究は国内外で盛んに行われている。日本語を対象とする手書き文字認識では、取り扱うべき字種の多様性と筆者の個性が強く影響し、高精度な認識システムを実現する障害となっている。本研究では、新しい距離尺度として、重み付き固有値距離を提案し、手書き文字認識システムの更なる性能向上を図った。 今年度では、当初の研究計画通りに研究を進め、以下の研究成果を得ている。 ・平成11年度に作成された標準パターンを用いて、提案距離尺度を用いた認識プログラムを開発した。認識の際には、字種ごとに用意された標準パターン(複数個の場合もある)と照合させ、最も一致するものとの距離を該当字種との距離として定義した。さらに、標準パターン数の学習による動的削減方式を開発し、認識時間の短縮を図った。具体的には、まず、認識システムの初期状態において字種ごとに準備されたすべての標準パターンを配置する。そして、学習サンプルを用いて学習を行い、字種間の距離をもとに標準パターンの統廃合を行い字種ごとの最適な標準パターン数を決定した。 ・プログラムの高速化行い、高速、高精度な手書き文字認識アルゴリズムのプロトタイピングを行った。また、研究成果を電子情報通信学会論文誌の掲載により広く公表を行った。

  19. Construction of knowledge-based next generation document

    KATO Nei, SUZUKI Masato

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B).

    Institution: Tohoku University

    1999 - 2000

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    Character recognition technology is an important technology for the new 21th century. In this research, we proposed a knowledge-based document recognition system. Segmentation technique, recognition technique and knowledge-based post-processing technique are the three main parts of this system. As the result, we applied the proposed system to a handwritten address recognition system and obtained a very high recognition rate. The test sample are 1,840, which collected by the Ministry of Post and Telecommunications. The recognition rate is beyond 90%, and the missed rate is below 2%. The reject rate is around 18%.

  20. 手書き文字の個性を考慮した多重型部分空間法を用いた高精度文字認識アルゴリズム

    加藤 寧

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 奨励研究(A)

    Institution: 東北大学

    1997 - 1998

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    本研究では、多重型部分空間法を提案し、個性的な字に対しても認識可能な高精度手書き文字認識アルゴリズムを開発する。 当初の研究計画・方法に従って研究を進めた結果、以下の成果が得られた。 1. 平成9年度に作成された標準パターンを用いて、部分空間の多重化を行う認識プログラムを開発した。認識の際には、未知入力を字種ごとに用意される複数個の標準パターンと照合させ、最も一致するものとの距離を該当字種との距離として定義する。この場合、字種ごとの標準パターン数は大変重要な問題となるが、ここでは、標準パターン数の学習による動的削減方式を開発し、問題の解決を図った。具体的には、まず、認識システムの初期状態において字種ごとに準備されたすべての標準パターンを配置する。そして、学習サンプルを用いて学習を行い、字種間の距離をもとに標準パターンの統廃合を行い字種ごとの最適な標準パターン数を決定した。 2. 文字のスキャナ入力から結果出力までのプログラムを開発し、システムのプロトタイプをワークステーション上に実装した。最終的にワークステーションとスキャナというシンプルな構成で不特定筆者が書いた手書き文字を99%以上認識できる認識システムのプロトタイプを構築した。また、上記開発のシステムを郵便あて名認識システムにも適用し、高精度で実用的なシステムを作成した。 3. 研究成果を国内外に公表を行った。

  21. A study of Real-time fault detecting system using information filtering technique

    NEMOTO Yoshiaki, SONE Hideaki, KATO Nei, MANSFIELD Glenn

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (C)

    Institution: Tohoku University

    1997 - 1998

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    Expansion in scale and speed are the most important features of Internet. Establishing an effective way for fault management becomes the main topic for this computer networks. In this research, we proposed a new system for real-time fault detecting in large scale computer network. We first constructed a traffic monitoring system for collecting the error packets from network traffic flow. Then, we proposed a new algorithm, called Dynamic Symptom Isolation Algorithm, to detect the network fault packets in an effective way, in which filtering technique is applied to suppress the detected error symptom, so that the small fault existing behind the large number faults in the network could be found thoroughly. Our experiments showed that the new system's performance is as twice as the conventional system for detecting faults symptoms in large network environment..

  22. Construction of Distributed Network Management System for High speed and Large Scale Information Network

    NEMOTO Yoshiaki, KATO Nei, MANSFIELD Glenn, HAMAMOTO Naokazu, MAKINO Shozo

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    1996 - 1997

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    Computer networks expand in a very fast pace in recent year with diversity. How to manage the network for users becomes and important problem. In this research, we focus on the network fault management system. The target of this research is to search for the proper method of management information collection and develop a basic system of network fault management. By the two years research and development, we proposed a new method of information collection for management system. By controlling management traffic in considering of the bandwidth and congestion of network this method can be used on any networks with different speed. We also proposed the idea of synchronization called Snapshot for obtaining high quality network management information. By using this idea, not only the synchronized management can be obtained easily on a SNMP (Simple Network Management Protocol) platform, but also the processing time is reduced. By making use of this two idea, we developed a prototype of fault management system. In this system, we proposed divide and conquer algorithm for detecting faults occcurred in network. This algorithm used event-driven, dynamic symptom isolation method. We have evaluated the performance of this proposed algorithm and have examined the effect of the various operational parameters on two different kinds of networks. In comparison with the conventional system, the system with divide and conquer mechanism improved the performance significantly and at the same time reduced management cost. We consider that the purpose of this research have been achieved.

  23. 脳の下側頭皮質をモデル化した高精度な手書き文字認識用ニューラルネットワーク

    加藤 寧

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 奨励研究(A)

    Institution: 東北大学

    1996 - 1996

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    人間の視覚パターン認識においては、視覚野の後部に位置する下側頭皮質中に個々のパターンに反応する神経細胞が物の形を識別する際に決定的な役割を果たしていることは近年の脳神経科学の研究によって明らかになっている。本研究は、このような人間のパターン認識機構をモデル化し計算機上で実現することにより、知的な手書き文字認識アルゴリズムを確立することを目的としている。 当初の研究計画に沿って研究を進めた結果、以下の研究成果が得られた。 ・下側頭皮質中に神経細胞が存在し個々のパターンに反応する認識機構をモデル化し、排他的学習によるニューラルネットワークのアーキテクチャを提案した。具体的には、ネットワーク中の個々のノードが神経細胞に対応し、排他学習により、1つのノードが1字種に対応するモデルを構築した。 上記の排他学習モデルを日本最大の手書き漢字データベースに適用し、認識実験を行った結果、95%以上の認識率がえられ、その有用性を実証できた。 上記の研究成果をまとめ、雑誌論文欄で記載した通り電子情報通信学会論文誌などを通じ公表を行った。

  24. 知識駆動型アルゴリズムを用いた高精度な手書き文字認識システムに関する研究

    根元 義章, 加藤 寧, 安倍 正人

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 基盤研究(C)

    Institution: 東北大学

    1996 - 1996

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    手書き文字認識システムは、音声認識システムと共に、ひとにやさしいマルチメディア情報化社会の実現に重要な役割を担うものであることは周知であり、その基礎となる手書き文字認識手法に関わる研究は国内外で盛んに行われている。本研究は、漢字の構造に着目した知識駆動型アルゴリズムおよびそれを用いた高精度な認識システムの構築を目的とする。 当初の研究計画に沿って研究を進めた結果、以下の研究成果が得られた。 ・文字の構造情報に関する知識を計算機に覚え込ませ、知識駆動型アルゴリズムを実現するための文字構造情報抽出を行った。具体的には、仮名およびJIS第1水準全漢字に対し、互いによく間違う字種のグル-ピングを行い、構造的に最も違う部分を抽出し、知識ベース化を行った。 ・構造情報に関する知識ベースを用い手書き文字認識システムを構築した。また、データベースETL9Bを用いて評価実験を行った。その結果、従来の手法より認識精度が大幅に向上することが確認した。 上記の研究成果をまとめ、雑誌論文欄で記載した通り電子情報通信学会論文誌などを通じ公表を行った。

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Media Coverage 21

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    高知新聞

    2018/01/21

    Type: Newspaper, magazine

  2. 複数スマホ接続 東北大、災害時の通信に

    日経産業新聞

    2014/02/06

    Type: Newspaper, magazine

  3. 孤立地域からの情報発信を容易にする通信技術を実証

    螢雪時代

    2013/12/14

    Type: Newspaper, magazine

  4. 圏外でもメール可能 東北大で開発進む スマホ間を転送

    茨城新聞

    2013/09/12

    Type: Newspaper, magazine

  5. 「圏外」でもメール可能 東北大開発進める 災害に備え海外も注目

    中国新聞

    2013/09/06

    Type: Newspaper, magazine

  6. 東北大 「圏外」でもメール可能 災害備え研究、海外注目

    宮崎日日新聞

    2013/09/06

    Type: Newspaper, magazine

  7. 通信圏外でもメール可能に 災害時備え東北大研究 スマホ機能活用 端末リレーで転送

    山陽新聞

    2013/09/06

    Type: Newspaper, magazine

  8. 東北大 「圏外」でメール送受信防災用研究に途上国注目

    東京新聞

    2013/09/05

    Type: Newspaper, magazine

  9. 数珠つなぎの通信ネットワーク 東北大、NICT スマホ・衛星・無人機でつくる接続に成功

    電波タイムズ

    2013/09/04

    Type: Newspaper, magazine

  10. 無人飛行機と複数スマホ通信東北大など実験成功

    日経産業新聞

    2013/08/29

    Type: Newspaper, magazine

  11. 東北大、スマホのWiFi 数珠つなぎ、さらに無人飛行機も経由してメールリレー

    インターネットウォッチ

    2013/07/29

    Type: Other

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    オンライン

  12. 圏外でもスマホで通信できる仕組みを開発。災害時などの活用にも期待ー東北大学

    タブロイド

    2013/07/29

    Type: Other

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    オンライン

  13. スマホの無線 メールリレー

    読売新聞

    2013/02/22

    Type: Newspaper, magazine

  14. Androidスマホ30台をWiFiで数珠つなぎ、2.5kmの距離でデータ伝達に成功

    インターネットウォッチ

    2013/02/22

    Type: Other

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    オンライン

  15. 圏外でも携帯でメッセージ可能に 東北大が実験成功

    ハザードラボ

    2013/02/21

    Type: Other

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    オンライン

  16. 災害時圏外でも通信可

    河北新報

    2013/02/19

    Type: Newspaper, magazine

  17. LTE-Aやスマホ間Wi-Fi伝送など新技術、広告や地下鉄で新サービスが続々

    Wireless Wire News

    2013/02/18

    Type: Other

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    オンライン

  18. 携帯電話が圏外でもメッセージ送信が可能に

    財形新聞

    2013/02/15

    Type: Newspaper, magazine

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    オンライン

  19. 東北大学、キャリアの回線を使わずスマホのWi-Fiだけでメッセージリレーに成功

    Wireless Wire News

    2013/02/15

    Type: Other

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    オンライン

  20. 東北大、通信事業者回線を使わずにスマホ同士でメッセージをリレーする実証実験に成功-災害時での利用にも期待

    インターネットコム

    2013/02/15

    Type: Other

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    オンライン

  21. 携帯回線使わず無線LANだけでメッセージをリレー 東北大、スマホ27台で成功

    ITmediaニュース

    2013/02/14

    Type: Other

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    オンライン

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