Researcher Profile and Settings

Researcher

• Name

  KAWANISHI KENICHI

Profile and Settings

• Name

  KENICHI, KAWANISHI

Foreign language

• Use in presentation

  English

• Use in publication

  English

Affiliation

• Gunma University, Associate Professor

Education

• 1995, The University of Tokyo
• 1993, Tohoku University, Faculty of Science
• 1995, The University of Tokyo, Graduate School, Division of Science
• 1993, Tohoku University, Faculty of Science

Degree

• (BLANK)

Research Experience

• 1997, 2001, NTT Laboratorios, Member
• 1997, 2001

Research Activities

Research Areas

• Telecommunications, Information networks
• Social infrastructure (civil Engineering, architecture, disaster prevention), Social systems engineering
• Social infrastructure (civil Engineering, architecture, disaster prevention), Safety engineering

Research Interests

• Teletraffic theory
• Queueing theory
• Performance evaluation

Published Papers

• Queueing models for cognitive wireless networks with sensing time of secondary users, T. Phung-Duc, K. Akutsu, K. Kawanishi, O. Salameh, and S. Wittevrongel, Mar. 2022, Annals of Operations Research, 310, 2, 641, 660

  DOI
• Performance models of NFV-based hybrid systems for delay-sensitive services, M. Sato, K. Kawamura, K. Kawanishi, and T. Phung-Duc, Dec. 2021, Lecture Notes in Computer Science, 13104, 181, 196

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• Delay performance of data-center queue with setup policy and abandonment, T. Phung-Duc and K. Kawanishi, 2020, vol. 293, no. 1, 269, 293

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• The M/PH/1+D queue with Markov-renewal service interruptions and its application to delayed mobile data offloading, K. Kawanishi and T. Takine, Oct. 2019, Performance Evaluation, 134

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• Multiserver retrial queue with setup time and its application to data centers, T. Phung-Duc and K. Kawanishi, Jan. 2019, Journal of Industrial and Management Optimization, 15, 1, 15, 35

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• フロー到着とクロストラフィックを考慮したSDN の待ち行列モデルとその解析, 牛垣 龍一, フンドック トゥアン, 河西 憲一, Yuan-Cheng Lai, Ying-Dar Lin, Aug. 2018, 63, 8, 480, 486
• Delay performance of data center queue with staggered setup policy and abandonment, T. Phung-Duc and K. Kawanishi, Jul. 2018, Proceedings of 12th International Conference on Queueing Theory and Network Applications 2018, Tsukuba, Japan, July 25-27.
• On algorithms for computing stochastic bounds of Markov chains with irreducibility and lumpability, S. Ishikawa and K. Kawanishi, 2017, Proceedings of 12th International Conference on Queueing Theory and Network Applications 2017
• 状態依存形の待ち行列モデルとサービスシステムへの応用, 河西憲一, 2017, 100, 4, 253-258
• Energy-aware data centers with s-staggered setup and abandonment, T. Phung-Duc and K.　Kawanishi, 2016, Lecture Notes in Computer Science, LNCS 9845
• MAP/M/c and M/PH/c queues with constant impatience times, Kawanishi, Ken'ichi; Takine, Tetsuya, 2016, QUEUEING SYSTEMS

  DOI
• Impacts of retrials on power-saving policy in data centers, T. Phung-Duc and K. Kawanishi, Dec. 2016, Proceedings of 11th International Conference on Queueing Theory and Network Applications 2016
• A NOTE ON THE VIRTUAL WAITING TIME IN THE STATIONARY PH/M/c + D QUEUE, Kawanishi, Ken'ichi; Takine, Tetsuya, 2015, JOURNAL OF APPLIED PROBABILITY
• AN EFFICIENT METHOD FOR PERFORMANCE ANALYSIS OF BLENDED CALL CENTERS WITH REDIAL, Tuan Phung-Duc; Kawanishi, Ken'ichi, 2014, ASIA-PACIFIC JOURNAL OF OPERATIONAL RESEARCH

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• Performance analysis of call centers with abandonment, retrial and after-call work, Tuan Phung-Duc; Kawanishi, Ken'ichi, Oct. 2014, PERFORMANCE EVALUATION

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• コールセンターのモデル化－待ち行列の視点から－, 河西 憲一, 2013
• Using game theory to investigate stochastic channel selection for multi-channel MAC protocol, B. Han and K. Kawanishi, Nov. 2012, The 13th International Conference on Communication Systems IEEE ICCS, Singapore
• Analysis of channel selection strategies for multi-channel MAC protocol using game theoretic models, B. Han and K. Kawanishi, Aug. 2012, 7th International Conference on Queueing Theory and Network Applications 2012, August 1-3, 2012, Kyoto, Japan.
• Modelling of retrial, abandonment and after-call work in call centers, T. Phung-Duc and K. Kawanishi, Aug. 2012, 7th International Conference on Queueing Theory and Network Applications 2012, August 1-3, 2012, Kyoto, Japan.
• The impact of retrial phenomenon on performance of blended call centers, T. Phung-Duc and K. Kawanishi, Jun. 2012, 9th International Workshop on Retrial Queues, June 28-30, 2012, Seville, Spain.
• コールセンターのモデル化－待ち行列の視点から－, 河西 憲一, Jun. 2012
• Multiserver retrial queues with after-call work, T. Phung-Duc and K. Kawanishi, Dec. 2011, Numerical Algebra, Control and Optimization
• Tail asymptotics for waiting time distribution of an M/M/s queue with general impatient time, Y. Sakuma, A. Inoie, K. Kawanishi, and M. Miyazawa, Aug. 2011, Journal of Industrial and Management Optimization
• Conditionally randomized channel selection algorithm for multi-channel MAC protocol in ad hoc networks, B. Han and K. Kawanishi, Apr. 2011, IEICE Transactions on Communications
• 待ち行列理論の活用, 河西 憲一, Feb. 2011
• Consideration of SCTP selective retransmission under the endpoints time non-synchronization,, L. Wang and K. Kawanishi, Nov. 2010, The 2nd International Symposium on Aware Computing (ISAC 2010)
• A smart channel selection strategy for multi-rate multi-channel MAC protocol,, 韓 斌, 河西 憲一:, Sep. 2010, 2010-MBL-55(14), 1-8 (2010-08-26)
• Performance of MPEG-4 transmission over SCTP multi-streaming in wireless networks, L. Wang and K. Kawanishi, Sep. 2010, IEICE Transactions on Communications
• Tail asymptotics for waiting time distribution of an M/M/s queue with general impatient time, Y. Sakuma, A. Inoie, K. Kawanishi, and M. Miyazawa, Jul. 2010, 5th International Conference on Queueing Theory and Network Applications (QTNA 2010)
• Real-time, fairness, and perceptual performance of MPEG-4 transmission in SCTP selective retransmission,, L.~Wang and K.~Kawanishi:, Jun. 2010, 第11回 インターネットテクノロジーワークショップ
• 電子情報通信学会知識ベース知識の森 5群1編「待ち行列理論とシミュレーション」第2章マルコフ形モデル, 河西 憲一, Jun. 2010
• 待ち行列理論の応用：コールセンターを例に, 河西憲一, Dec. 2009, 54, 12, 744-748
• Congestion window limit multi-channel MAC protocol: Employing random channel selection strategy for multi-hop ad hoc networks, B. Han, K. Kawanishi, and Y. Onozato, Sep. 2009
• Achieving robust fairness of SCTP extension for MPEG-4 streaming, L. Wang, K. Kawanishi, and Y. Onozato, Sep. 2009, Proceedings of the 20th Personal, Indoor and Mobile Radio Communications Symposium 2009 (PIMRC '09)
• An alleviate bottleneck multi-channel MAC protocol for ad-hoc networks, B. Han, K. Kawanishi, and Y. Onozato, Nov. 2008, Proceedings of 4th International Student Conference at Ibaraki University (ISCIU4)
• QBD approximations of a call center queueing model with general patience distribution, K. Kawanishi, Aug. 2008, Computers & Operations Research
• MPEG-4 optimal transmission over SCTP multi-streaming in 802.11 wireless access media, L. Wang, K. Kawanishi, and Y. Onozato, Apr. 2008, Proceedings of 7th Asia-Pacific Symposium on Information and Telecommunication Technologies (APSITT 2008)
• Simulation-based optimization on MPEG-4 over SCTP multi-streaming with differentiated retransmission policy in lossy link, L. Wang, K. Kawanishi and Y. Onozato, Dec. 2007, Proc. 2007 IEEE Asia-Pacific Services Computing Conference (IEEE APSCC 2007)
• SCTPマルチストリーミングによるMPEG4データの最適伝送に関する検討, 王 理, 河西憲一, 小野里好邦, Oct. 2007, JSST-MM2007, 1-6
• Region Division Assignment:A New OVSF Code Reservation and Assignment Scheme for Downlink Capacity in W-CDMA Systems, Rujipun Assarut / KAWANISHI KENICHI / YAMAMOTO USHIO / ONOZATO YOSHIKUNI, Jun. 2006, Wireless Networks, Publisher: Springer Netherlands
• On waiting time distribution of a queueing system with post-service activity, KAWANISHI KENICHI, 2006, Computers and Mathematics with Applications
• An Effect of Migration Log Losses on the Searching Costs for Mobile Agents, Ryou Nakanishi / Masayuki Ishii / Shinsuke Kobayashi / ONOZATO YOSHIKUNI / KAWANISHI KENICHI, May 2005, 2005 Hawaii, IEICE and SITA Joint Conference on Information Theory, May 25-27, Hawaii, USA, (The Technical Report of The Proceeding of The Institute of electronics, imformation and communication engineers)
• On the counting process for a class of Markovian arrival processes with an application to a queueing system, 河西 憲一, Apr. 2005, Queueing Systems
• モバイルエージェントの動きを利用した位置管理, 小林　晋輔 / 石井　雅将 / 小野里 好邦 / 河西 憲一, Feb. 2005, 46, 2, 506-516
• A closed-form solution on a level-dependent Markovian arrival process with queueing application, 河西 憲一, Sep. 2004, Calcolo
• Cost Reduction for Highly Mobile Users with Commonly Visited Sites, Takaaki Arakawa / KAWANISHI KENICHI / ONOZATO YOSHIKUNI, Jul. 2004, IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
• Centralized Flow Control Scheme for Rate-based Networks, RAJKUMAR DESHPANDE / KAWANISHI KENICHI / ONOZATO YOSHIKUNI / PRAKASH VYAVAHARE, Jul. 2004, IETE Journal of Research
• ２状態マルコフ型到着過程の重畳における階乗モーメントの表現について, 河西 憲一, Jun. 2004, IN2004-16
• Numerical investigation of the influence of deadline on the performance of a queueing system with impatient customers, 河西 憲一, Jun. 2004, 12th INFORMS Applied Probability Society Conference
• Location-Velocity mobility model for wireless networks, Michihiro .Inoue / Li Yishu / KAWANISHI KENICHI / ONOZATO YOSHIKUNI, Nov. 2003, 5th Asia-Pacific Symposium on Information and Telecommunication Technologies (APSITT2003),November 25-26, Noumea, New Caledonia
• Hybrid OVSF code assignment scheme in W-CDMA, Yasufumi Sekine / KAWANISHI KENICHI / YAMAMOTO USHIO / ONOZATO YOSHIKUNI, Aug. 2003, 2003 IEEE Pacific Rim Conference on Communications, Commputers adn Signal Processing(PACRIM'03),August28-30,Victoria, BC,Canada
• Impact of Mobility on Blocking in One-dimensional Cellular Networks with New Call Channel Limiting Scheme, Sakchai Thipchaksurat / KAWANISHI KENICHI / YAMAMOTO USHIO / ONOZATO YOSHIKUNI, Nov. 2002, IEEE Global Telecommunications Conference(GLOBECOM2002),November17-21,Taipei, Taiwan, GEN-02-3 Mobility and Session Management(II)
• Cost Analysis of a Location Management Strategy with Commonly Visited Sites in PCS Networks, Takaaki Arakawa / KAWANISHI KENICHI / ONOZATO YOSHIKUNI / Rajkumar Deshpande, Oct. 2002, The 5th International Symposimum on Wireless Personal Multimedia Communications(WPMC'02),October27-30,Sheraton Waikiki, Honolulu,Hawaii
• Waiting time distribution of a queueing system with post-service activity, 河西 憲一, Sep. 2002, pp. 213-222
• Performance Evaluation of Orthogonal Variable-Spreading-Factor Code Assignment Schemws Based on UMTS/IMT-2000 in W-CDMA, Rujipun Assarut / KAWANISHI KENICHI / YAMAMOTO USHIO / ONOZATO YOSHIKUNI, Sep. 2002, 2002 IEEE 56th Vehicular Technologu Conference(VTC2002-Fall), 24-28September, Vancouver,British Columbia,Canada
• Performance Evaluation of Othogonal Variable-Spreading-Factor Code Assignment Schemes in W-CDMA, Rujipun Assarut / KAWANISHI KENICHI / Rajkumar Deshpande / YAMAMOTO USHIO / ONOZATO YOSHIKUNI, Apr. 2002, 2000IEEE International Conference on Communications(ICC2002),28April-2May,New York,NY U.S.A.
• Region Division Assignment of Orthogonal Variable-Spreading-Factor Codes in W-CDMA, Rujipun ASSARUT / KAWANISHI KENICHI / YAMAMOTO USHIO / ONOZATO YOSHIKUNI / Masahiko MATSUSHITA, Oct. 2001, IEEE 54th Vehicular Technology Conference(VTC Fall 2001), October 7-11, Atlantic City, U.S.A.
• A Study on Optimization Problem in Channel Reservation for Ahead Cells Scheme in One-dimensional Cellular Networks, Sakchai THIPCHAKSURAT / Michihiro INOUE / KAWANISHI KENICHI / YAMAMOTO USHIO / ONOZATO YOSHIKUNI, Sep. 2001, The Fourth International Symposium on Wireless Personal Multimedia Communications(WPMC'01)
• An application of Markovian point process to queueing system with post-service activity, 河西 憲一, Jul. 2001
• Performance analysis of a server for facsimile communication networks, 河西 憲一 / 高橋　敬隆, Jul. 2001, vol. 15, no. 3, pp. 295-310
• Trunk reservation effects on multi-server system with batch arrivals of loss and delay customers, 河西 憲一 ／ 高橋　敬隆 ／ 竹中　豊文, Oct. 2000, IEICE Transactions on Communications, vol. E83-B, no. 1, pp. 20-29
• A diffusion approximation for branching Poisson process input queueing systems, 高橋　敬隆 ／ 河西 憲一, Oct. 1999, Proceedings of the Second Asia-Pacific Conference on Industrial Engineering and Management Systems, pp. 87-92
• Traffic measurement system with trap and polling methods and its performance, 河西 憲一 ／ 高橋　敬隆 ／ 竹中　豊文, Oct. 1999, IEICE Transactions on Communications, vol. E82-B, no. 10, pp. 1557-1565
• Call admission control in store-and-forward network systems, 河西 憲一 ／ 高橋　敬隆, Sep. 1999, Proceedings of the First Western Pacific/Third Australia-Japan Workshop on Stochastic Models in Engineering, Technology and Management, pp. 259-268
• Analysis of a mixed event-driven and periodic measurement method for workload process, 河西 憲一 ／ 高橋　敬隆 ／ 竹中　豊文, Oct. 1998, Proceedings of the 11th ITC Specialist Seminar, pp. 104-111
• Throughput analysis of a server with heterogeneous inputs for facsimile communication networks, 河西 憲一 ／ 高橋　敬隆 ／ 竹中　豊文, Oct. 1998, IEICE Transactions on Communications, vol. E81-B, no. 10, pp. 1850-1858
• Modeling and performance analysis of hybrid systems by queues with setup time, M. Sato, K. Kawamura, K. Kawanishi, T. Phung-Duc, Nov. 2023, Performance Evaluation, 162, Scientific journal

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MISC

• QBD approximations of a call center queueing model with general patience distribution, Ken'ichi Kawanishi, Aug. 2008, COMPUTERS & OPERATIONS RESEARCH, 35, 8, 2463, 2481

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• Region division assignment of orthogonal variable-spreading-factor codes in W-CDMA, R Assarutt,K Kawanishi,U Yamamoto,Y Onozato,M Matsushita, 2001, IEEE 54TH VEHICULAR TECHNOLOGY CONFERENCE, VTC FALL 2001, VOLS 1-4, PROCEEDINGS, 1884, 1888
• A NOTE ON THE VIRTUAL WAITING TIME IN THE STATIONARY PH/M/c plus D QUEUE, Ken'ichi Kawanishi,Tetsuya Takine, Sep. 2015, JOURNAL OF APPLIED PROBABILITY, 52, 3, 899, 903
• Performance of MPEG-4 Transmission over SCTP Multi-Streaming in Wireless Networks, Li Wang,Ken'ichi Kawanishi, Sep. 2010, IEICE TRANSACTIONS ON COMMUNICATIONS, E93B, 9, 2336, 2347

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• Performance of MPEG-4 Transmission over SCTP Multi-Streaming in Wireless Networks, Li Wang,Ken'ichi Kawanishi, Sep. 2010, IEICE TRANSACTIONS ON COMMUNICATIONS, E93B, 9, 2336, 2347

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• Waiting time distribution of a queueing system with postservice activity, K Kawanishi, Jan. 2006, COMPUTERS & MATHEMATICS WITH APPLICATIONS, 51, 2, 209, 218

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• Simulation-based optimization on MPEG-4 over SCTP multi-streaming with differentiated retransmission policy in lossy link, Li Wang,Ken'ichi Kawanishi,Yoshikuni Onozato, 2007, 2ND IEEE ASIA-PACIFIC SERVICES COMPUTING CONFERENCE, PROCEEDINGS, 164, 171

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• Simulation-based optimization on MPEG-4 over SCTP multi-streaming with differentiated retransmission policy in lossy link, Li Wang,Ken'ichi Kawanishi,Yoshikuni Onozato, 2007, 2ND IEEE ASIA-PACIFIC SERVICES COMPUTING CONFERENCE, PROCEEDINGS, 164, 171

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• On the counting process for a class of markovian arrival processes with an application to a queueing system, K Kawanishi, Feb. 2005, QUEUEING SYSTEMS, 49, 2, 93, 122

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• Performance evaluation of orthogonal variable-spreading-factor code assignment schemes in W-CDMA, R Assarut,K Kawanishi,R Deshpande,U Yamamoto,Y Onozato, 2002, 2002 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, VOLS 1-5, CONFERENCE PROCEEDINGS, 3050, 3054
• Performance evaluation of orthogonal variable-spreading-factor code assignment schemes in W-CDMA, R Assarut,K Kawanishi,R Deshpande,U Yamamoto,Y Onozato, 2002, 2002 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, VOLS 1-5, CONFERENCE PROCEEDINGS, 3050, 3054
• Cost analysis of a location management strategy with commonly visited sites in PCS networks, T Arakawa,K Kawanishi,Y Onozato,R Deshpande, 2002, 5TH INTERNATIONAL SYMPOSIUM ON WIRELESS PERSONAL MULTIMEDIA COMMUNICATIONS, VOLS 1-3, PROCEEDINGS, 1395, 1399

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• Cost analysis of a location management strategy with commonly visited sites in PCS networks, T Arakawa,K Kawanishi,Y Onozato,R Deshpande, 2002, 5TH INTERNATIONAL SYMPOSIUM ON WIRELESS PERSONAL MULTIMEDIA COMMUNICATIONS, VOLS 1-3, PROCEEDINGS, 1395, 1399

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• Hybrid OVSF code assignment scheme in W-CDMA, Y Sekine,K Kawanishi,U Yamamoto,Y Onozato, 2003, 2003 IEEE PACIFIC RIM CONFERENCE ON COMMUNICATIONS, COMPUTERS, AND SIGNAL PROCESSING, VOLS 1 AND 2, CONFERENCE PROCEEDINGS, 384, 387
• Hybrid OVSF code assignment scheme in W-CDMA, Y Sekine,K Kawanishi,U Yamamoto,Y Onozato, 2003, 2003 IEEE PACIFIC RIM CONFERENCE ON COMMUNICATIONS, COMPUTERS, AND SIGNAL PROCESSING, VOLS 1 AND 2, CONFERENCE PROCEEDINGS, 384, 387
• A closed-form solution on a level-dependent Markovian arrival process with queueing application, K Kawanishi, Oct. 2004, CALCOLO, 41, 3, 153, 175

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• Cost reduction for highly mobile users with commonly visited sites, T Arakawa,K Kawanishi,Y Onozato, Jul. 2004, IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES, E87A, 7, 1700, 1711
• Cost reduction for highly mobile users with commonly visited sites, T Arakawa,K Kawanishi,Y Onozato, Jul. 2004, IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES, E87A, 7, 1700, 1711
• Centralized Flow Control Scheme for rate-based networks, R Deshpande,K Kawanishi,Y Onozato,P Vyavahare, Jul. 2004, IETE JOURNAL OF RESEARCH, 50, 4, 245, 256
• Centralized Flow Control Scheme for rate-based networks, R Deshpande,K Kawanishi,Y Onozato,P Vyavahare, Jul. 2004, IETE JOURNAL OF RESEARCH, 50, 4, 245, 256
• MAP/M/c and M/PH/c queues with constant impatience times, Ken'ichi Kawanishi,Tetsuya Takine, Apr. 2016, QUEUEING SYSTEMS, 82, 3-4, 381, 420

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• Energy-Aware Data Centers with s-Staggered Setup and Abandonment, Tuan Phung-Duc,Ken'ichi Kawanishi, 2016, Analytical and Stochastic Modelling Techniques and Applications, 9845, 269, 283

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• Energy-Aware Data Centers with s-Staggered Setup and Abandonment, Tuan Phung-Duc,Ken'ichi Kawanishi, 2016, Analytical and Stochastic Modelling Techniques and Applications, 9845, 269, 283

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• TAIL ASYMPTOTICS FOR WAITING TIME DISTRIBUTION OF AN M/M/s QUEUE WITH GENERAL IMPATIENT TIME, Yutaka Sakuma,Atsushi Inoie,Ken'ichi Kawanishi,Masakiyo Miyazawa, Aug. 2011, JOURNAL OF INDUSTRIAL AND MANAGEMENT OPTIMIZATION, 7, 3, 593, 606

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• TAIL ASYMPTOTICS FOR WAITING TIME DISTRIBUTION OF AN M/M/s QUEUE WITH GENERAL IMPATIENT TIME, Yutaka Sakuma,Atsushi Inoie,Ken'ichi Kawanishi,Masakiyo Miyazawa, Aug. 2011, JOURNAL OF INDUSTRIAL AND MANAGEMENT OPTIMIZATION, 7, 3, 593, 606

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• Conditionally Randomized Channel Selection Algorithm for Multi-Channel MAC Protocol in Ad Hoc Networks, Bin Han,Ken'ichi Kawanishi, Apr. 2011, IEICE TRANSACTIONS ON COMMUNICATIONS, E94B, 4, 940, 950

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• Conditionally Randomized Channel Selection Algorithm for Multi-Channel MAC Protocol in Ad Hoc Networks, Bin Han,Ken'ichi Kawanishi, Apr. 2011, IEICE TRANSACTIONS ON COMMUNICATIONS, E94B, 4, 940, 950

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• Performance analysis of call centers with abandonment, retrial and after-call work, Tuan Phung-Duc,Ken'ichi Kawanishi, Oct. 2014, PERFORMANCE EVALUATION, 80, 43, 62

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• Performance analysis of call centers with abandonment, retrial and after-call work, Tuan Phung-Duc,Ken'ichi Kawanishi, Oct. 2014, PERFORMANCE EVALUATION, 80, 43, 62

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• AN EFFICIENT METHOD FOR PERFORMANCE ANALYSIS OF BLENDED CALL CENTERS WITH REDIAL, Tuan Phung-Duc,Ken'ichi Kawanishi, Apr. 2014, ASIA-PACIFIC JOURNAL OF OPERATIONAL RESEARCH, 31, 2

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• AN EFFICIENT METHOD FOR PERFORMANCE ANALYSIS OF BLENDED CALL CENTERS WITH REDIAL, Tuan Phung-Duc,Ken'ichi Kawanishi, Apr. 2014, ASIA-PACIFIC JOURNAL OF OPERATIONAL RESEARCH, 31, 2

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• An Effect of Migration Log Losses on the Searching Costs for Mobile Agents, Ryou Nakanishi,Masayuki Ishii,Shinsuke Kobayashi,ONOZATO YOSHIKUNI,KAWANISHI KENICHI, 2005, 2005 Hawaii, IEICE and SITA Joint Conference on Information Theory, May 25-27, Hawaii, USA, (The Technical Report of The Proceeding of The Institute of electronics, imformation and communication engineers), 67, 71
• Location-Velocity mobility model for wireless networks, Michihiro .Inoue,Li Yishu,KAWANISHI KENICHI,ONOZATO YOSHIKUNI, 2003, 5th Asia-Pacific Symposium on Information and Telecommunication Technologies (APSITT2003),November 25-26, Noumea, New Caledonia, 105, 110
• On waiting time distribution of a queueing system with post-service activity, KAWANISHI KENICHI, 2006, Computers and Mathematics with Applications, vol. 51, no. 2, pp. 209-218

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• Performance Evaluation of Orthogonal Variable-Spreading-Factor Code Assignment Schemws Based on UMTS/IMT-2000 in W-CDMA, Rujipun Assarut,KAWANISHI KENICHI,YAMAMOTO USHIO,ONOZATO YOSHIKUNI, 2002, 2002 IEEE 56th Vehicular Technologu Conference(VTC2002-Fall), 24-28September, Vancouver,British Columbia,Canada, Seesion66:GDS/UMTS/EDGE6,, No.1(CD-ROM)
• Numerical investigation of the influence of deadline on the performance of a queueing system with impatient customers, 河西 憲一, 2004, 12th INFORMS Applied Probability Society Conference
• A closed-form solution on a level-dependent Markovian arrival process with queueing application, 河西 憲一, 2004, Calcolo, vol. 41, no. 3, pp. 153-175

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• On the counting process for a class of Markovian arrival processes with an application to a queueing system, 河西 憲一, 2005, Queueing Systems, vol. 49, no. 2, pp. 93-122

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• A Study on Optimization Problem in Channel Reservation for Ahead Cells Scheme in One-dimensional Cellular Networks, Sakchai THIPCHAKSURAT,Michihiro INOUE,KAWANISHI KENICHI,YAMAMOTO USHIO,ONOZATO YOSHIKUNI, 2001, The Fourth International Symposium on Wireless Personal Multimedia Communications(WPMC'01), 341, 346
• Region Division Assignment of Orthogonal Variable-Spreading-Factor Codes in W-CDMA, Rujipun ASSARUT,KAWANISHI KENICHI,YAMAMOTO USHIO,ONOZATO YOSHIKUNI,Masahiko MATSUSHITA, 2001, IEEE 54th Vehicular Technology Conference(VTC Fall 2001), October 7-11, Atlantic City, U.S.A., 1884, 1888
• Region Division Assignment:A New OVSF Code Reservation and Assignment Scheme for Downlink Capacity in W-CDMA Systems, Rujipun Assarut,KAWANISHI KENICHI,YAMAMOTO USHIO,ONOZATO YOSHIKUNI, 2006, Wireless Networks, Publisher: Springer Netherlands, 12, 3, 357, 368

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• Impact of Mobility on Blocking in One-dimensional Cellular Networks with New Call Channel Limiting Scheme, Sakchai Thipchaksurat,KAWANISHI KENICHI,YAMAMOTO USHIO,ONOZATO YOSHIKUNI, 2002, IEEE Global Telecommunications Conference(GLOBECOM2002),November17-21,Taipei, Taiwan, GEN-02-3 Mobility and Session Management(II), GEN-02-3(CD-ROM)
• MPEG-4 optimal transmission over SCTP multi-streaming in 802.11 wireless access media, L. Wang,K. Kawanishi,Y. Onozato, 2008, Proceedings of 7th Asia-Pacific Symposium on Information and Telecommunication Technologies (APSITT 2008), 226, 231

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• An alleviate bottleneck multi-channel MAC protocol for ad-hoc networks, B. Han,K. Kawanishi,Y. Onozato, 2008, Proceedings of 4th International Student Conference at Ibaraki University (ISCIU4), 172, 177
• Congestion window limit multi-channel MAC protocol: Employing random channel selection strategy for multi-hop ad hoc networks, B. Han,K. Kawanishi,Y. Onozato, 2009
• Achieving robust fairness of SCTP extension for MPEG-4 streaming, L. Wang,K. Kawanishi,Y. Onozato, 2009, Proceedings of the 20th Personal, Indoor and Mobile Radio Communications Symposium 2009 (PIMRC '09)
• Consideration of SCTP selective retransmission under the endpoints time non-synchronization,, L. Wang,K. Kawanishi, 2010, The 2nd International Symposium on Aware Computing (ISAC 2010)

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• Real-time, fairness, and perceptual performance of MPEG-4 transmission in SCTP selective retransmission,, L.~Wang,K.~Kawanishi, 2010, 第11回 インターネットテクノロジーワークショップ
• Using game theory to investigate stochastic channel selection for multi-channel MAC protocol, B. Han,K. Kawanishi, 2012, The 13th International Conference on Communication Systems IEEE ICCS, Singapore, pp.~172--176

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• Analysis of channel selection strategies for multi-channel MAC protocol using game theoretic models, B. Han,K. Kawanishi, 2012, 7th International Conference on Queueing Theory and Network Applications 2012, August 1-3, 2012, Kyoto, Japan.
• Modelling of retrial, abandonment and after-call work in call centers, T. Phung-Duc,K. Kawanishi, 2012, 7th International Conference on Queueing Theory and Network Applications 2012, August 1-3, 2012, Kyoto, Japan.
• The impact of retrial phenomenon on performance of blended call centers, T. Phung-Duc,K. Kawanishi, 2012, 9th International Workshop on Retrial Queues, June 28-30, 2012, Seville, Spain.
• Tail asymptotics for waiting time distribution of an M/M/s queue with general impatient time, Y. Sakuma,A. Inoie,K. Kawanishi,M. Miyazawa, 2010, 5th International Conference on Queueing Theory and Network Applications (QTNA 2010)

  DOI
• Multiserver retrial queues with after-call work, T. Phung-Duc,K. Kawanishi, 2011, Numerical Algebra, Control and Optimization, 1, 4, 639, 656

  DOI
• A NOTE ON THE VIRTUAL WAITING TIME IN THE STATIONARY PH/M/c plus D QUEUE, Kawanishi\, Ken'ichi,Takine\, Tetsuya, 2015, JOURNAL OF APPLIED PROBABILITY, 52, 3, 899, 903
• Impacts of retrials on power-saving policy in data centers, T. Phung-Duc,K. Kawanishi, 2016, Proceedings of 11th International Conference on Queueing Theory and Network Applications 2016
• On algorithms for computing stochastic bounds of Markov chains with irreducibility and lumpability, S. Ishikawa,K. Kawanishi, 2017, Proceedings of 12th International Conference on Queueing Theory and Network Applications 2017, 95, 98
• Multiserver retrial queue with setup time and its application to data centers, T. Phung-Duc,K. Kawanishi, 2018, Journal of Industrial and Management Optimization

  DOI
• An Effect of Migration Log Losses on the Searching Costs for Mobile Agents, Ryou Nakanishi,Masayuki Ishii,Shinsuke Kobayashi,ONOZATO YOSHIKUNI,KAWANISHI KENICHI, 2005, 67, 71
• ２状態マルコフ型到着過程の重畳における階乗モーメントの表現について, 河西 憲一, 2004, IN2004-16
• Location-Velocity mobility model for wireless networks, Michihiro .Inoue,Li Yishu,KAWANISHI KENICHI,ONOZATO YOSHIKUNI, 2003, 105, 110
• モバイルエージェントの動きを利用した位置管理, 小林 晋輔,石井 雅将,小野里 好邦,河西 憲一, 2005, 46, 2, 506, 516
• Performance Evaluation of Orthogonal Variable-Spreading-Factor Code Assignment Schemws Based on UMTS/IMT-2000 in W-CDMA, Rujipun Assarut,KAWANISHI KENICHI,YAMAMOTO USHIO,ONOZATO YOSHIKUNI, 2002, Seesion66:GDS/UMTS/EDGE6,, No.1(CD-ROM)
• An application of Markovian point process to queueing system with post-service activity, 河西 憲一, 2001
• Performance analysis of a server for facsimile communication networks, 河西 憲一,高橋 敬隆, 2001, vol. 15, no. 3, pp. 295-310

  DOI
• Waiting time distribution of a queueing system with post-service activity, 河西 憲一, 2002, pp. 213-222
• Numerical investigation of the influence of deadline on the performance of a queueing system with impatient customers, 河西 憲一, 2004
• A Study on Optimization Problem in Channel Reservation for Ahead Cells Scheme in One-dimensional Cellular Networks, Sakchai THIPCHAKSURAT,Michihiro INOUE,KAWANISHI KENICHI,YAMAMOTO USHIO,ONOZATO YOSHIKUNI, 2001, 341, 346
• QBD approximations of a call center queueing model with general patience distribution, K. Kawanishi, 2008, 35, 8, 2463, 2481

  DOI
• Region Division Assignment:A New OVSF Code Reservation and Assignment Scheme for Downlink Capacity in W-CDMA Systems, Rujipun Assarut,KAWANISHI KENICHI,YAMAMOTO USHIO,ONOZATO YOSHIKUNI, 2006, 12, 3, 357, 368

  DOI
• Impact of Mobility on Blocking in One-dimensional Cellular Networks with New Call Channel Limiting Scheme, Sakchai Thipchaksurat,KAWANISHI KENICHI,YAMAMOTO USHIO,ONOZATO YOSHIKUNI, 2002, GEN-02-3(CD-ROM)
• Call admission control in store-and-forward network systems, 河西 憲一,高橋 敬隆, 1999, pp. 259-268
• Throughput analysis of a server with heterogeneous inputs for facsimile communication networks, 河西 憲一,高橋 敬隆,竹中 豊文, 1998, vol. E81-B, no. 10, pp. 1850-1858
• Traffic measurement system with trap and polling methods and its performance, 河西 憲一,高橋 敬隆,竹中 豊文, 1999, vol. E82-B, no. 10, pp. 1557-1565
• Trunk reservation effects on multi-server system with batch arrivals of loss and delay customers, 河西 憲一,高橋 敬隆,竹中 豊文, 2000, vol. E83-B, no. 1, pp. 20-29
• Analysis of a mixed event-driven and periodic measurement method for workload process, 河西 憲一,高橋 敬隆,竹中 豊文, 1998, pp. 104-111
• A diffusion approximation for branching Poisson process input queueing systems, 高橋 敬隆,河西 憲一, 1999, pp. 87-92
• MPEG-4 optimal transmission over SCTP multi-streaming in 802.11 wireless access media, L. Wang,K. Kawanishi,Y. Onozato, 2008, 226, 231

  DOI
• An alleviate bottleneck multi-channel MAC protocol for ad-hoc networks, B. Han,K. Kawanishi,Y. Onozato, 2008, 172, 177
• Congestion window limit multi-channel MAC protocol: Employing random channel selection strategy for multi-hop ad hoc networks, B. Han,K. Kawanishi,Y. Onozato, 2009
• Achieving robust fairness of SCTP extension for MPEG-4 streaming, L. Wang,K. Kawanishi,Y. Onozato, 2009
• SCTPマルチストリーミングによるMPEG4データの最適伝送に関する検討, 王 理,河西憲一,小野里好邦, 2007, JSST-MM2007, 1, 6
• 待ち行列理論の応用：コールセンターを例に, 河西憲一, 2009, 54, 12, 744, 748
• Consideration of SCTP selective retransmission under the endpoints time non-synchronization,, L. Wang,K. Kawanishi, 2010

  DOI
• A smart channel selection strategy for multi-rate multi-channel MAC protocol,, 韓 斌,河西 憲一, 2010, 2010-MBL-55(14), 1-8 (2010-08-26)
• Real-time, fairness, and perceptual performance of MPEG-4 transmission in SCTP selective retransmission,, L.~Wang,K.~Kawanishi, 2010
• Using game theory to investigate stochastic channel selection for multi-channel MAC protocol, B. Han,K. Kawanishi, 2012, pp.~172--176

  DOI
• Analysis of channel selection strategies for multi-channel MAC protocol using game theoretic models, B. Han,K. Kawanishi, 2012
• Modelling of retrial, abandonment and after-call work in call centers, T. Phung-Duc,K. Kawanishi, 2012
• The impact of retrial phenomenon on performance of blended call centers, T. Phung-Duc,K. Kawanishi, 2012
• Tail asymptotics for waiting time distribution of an M/M/s queue with general impatient time, Y. Sakuma,A. Inoie,K. Kawanishi,M. Miyazawa, 2010

  DOI
• Multiserver retrial queues with after-call work, T. Phung-Duc,K. Kawanishi, 2011, 1, 4, 639, 656

  DOI
• コールセンターのモデル化－待ち行列の視点から－, 河西 憲一, 2012
• 待ち行列理論の活用, 河西 憲一, 2011
• 電子情報通信学会知識ベース知識の森 5群1編「待ち行列理論とシミュレーション」第2章マルコフ形モデル, 河西 憲一, 2010
• MAP/M/c and M/PH/c queues with constant impatience times, Kawanishi\, Ken'ichi,Takine\, Tetsuya, 2016, 82, 381, 420

  DOI
• 状態依存形の待ち行列モデルとサービスシステムへの応用, 河西憲一, 2017, 100, 4, 253, 258
• Impacts of retrials on power-saving policy in data centers, T. Phung-Duc,K. Kawanishi, 2016
• コールセンターのモデル化－待ち行列の視点から－, 河西 憲一, 2013
• On algorithms for computing stochastic bounds of Markov chains with irreducibility and lumpability, S. Ishikawa,K. Kawanishi, 2017, 95, 98
• Multiserver retrial queue with setup time and its application to data centers, T. Phung-Duc,K. Kawanishi, 2018

  DOI

Books etc

• 待ち行列理論の基礎と応用, 2014

Presentations

• Bounding performance of stochastic models for server virtualization in cloud computing, Ken'ichi Kawanishi, 10th International Congress on Industrial and Applied Mathematics, ICIAM 2023 TOKYO, 22 Aug. 2023, 20 Aug. 2023, 25 Aug. 2023, English, Japan, International conference
• Proposal and evaluation of improving unfairness between QUIC flows in wireless LAN, Yoshiki OSUGA, Ken'ichi KAWANISHI, THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS, Technical Committee on Network Systems, 02 Mar. 2023
• 途中退去する待ち行列モデルの分解公式による評価, 河西憲一, 日本オペレーションズ・リサーチ学会2021年春季研究発表会, 03 Mar. 2021, Domestic conference
• 5Gネットワークのモデル化と性能解析, 川村 航平, 河西 憲一, フンドック トゥアン, 待ち行列シンポジウム「確率モデルとその応用」, 27 Jan. 2021, Domestic conference
• 客が途中退去する待ち行列モデルの定常分布の解形式, 河西憲一, 日本オペレーションズ・リサーチ学会2020年春季研究発表会, Mar. 2020
• TCP BBRの公平性の調査およびキューの管理による改善, 柴山 卓也、河西 憲一, 2019年電子情報通信学会ソサイエティ大会, Sep. 2019
• QUICとTCP間の不公平性の検討, 藤岡 慎太郎、河西 憲一, 2018年度電子情報通信学会東京支部学生会研究発表会, 02 Mar. 2019
• 途中退去を伴う複数窓口待ち行列モデルの近似解析, 河西憲一, Mar. 2019
• 途中退去がある待ち行列モデルの損失率の近似評価, 河西憲一, 日本オペレーションズ・リサーチ学会待ち行列部会４月例会, Apr. 2018
• フロー到着とクロストラフィックを考慮したSDNの待ち行列モデルとその解析, 待ち行列シンポジウム「確率モデルとその応用」, 2018
• Probabilistic Model Checking for Biochemical Reaction Systems, 待ち行列シンポジウム「確率モデルとその応用」, 2018
• OpenFlowにおけるパケットの処理時間が異なる場合の転送遅延時間の評価, 電子情報通信学会東京支部学生会研究発表会, 2018
• ワイヤレスセンサネットワークでの時間短縮のための伝送順に関する研究, 電子情報通信学会東京支部学生会研究発表会, 2018
• Adaptive Packet Size Assignmentを用いた動画配信のSSIM評価, 電子情報通信学会東京支部学生会研究発表会, 2018
• 途中退去がある待ち行列モデルの損失率の近似評価, 日本オペレーションズ・リサーチ学会待ち行列部会, 2018
• 既約でLumpableなマルコフ連鎖の上界の改善, ２０１６年度待ち行列シンポジウム「確率モデルとその応用」, 2017
• A simple method for performance analysis of data center with setup time and abandonment, The 2016 Spring National Conference of Operations Research Society of Japan, 2016
• サービスシステムにおける途中退去と電源制御方式を考慮した待ち時間の評価法, 日本オペレーションズ・リサーチ学会２０１６年春季研究発表会, 2016
• Multiserver retrial queue with setup time, 11th International Workshop on Retrial Queues, 2016
• 上界を与えるLumpableな既約マルコフ連鎖を求めるアルゴリズムの考察, 日本オペレーションズ・リサーチ学会2016年秋季研究発表会, 2016
• A simple method for performance analysis of data center with setup time and abandonment, The 2016 Spring National Conference of Operations Research Society of Japan, 2016
• Multiserver retrial queue with setup time, 11th International Workshop on Retrial Queues, 2016
• 待ち時間に制約のある複数サーバ待ち行列モデルの解析, 日本オペレーションズ・リサーチ学会不確実性環境下の意思決定モデリング研究部会, 2015
• 途中退去のある複数サーバ待ち行列モデルの定常分布, 日本オペレーションズ・リサーチ学会待ち行列部会, 2014
• 通信中のアプリケーションを考慮した異種無線ネットワーク切替方式の評価, 電子情報通信学会東京支部学生会研究発表会, 2013
• サービス中断中に客の途中退去が伴う有限呼源再呼モデルの検討, 日本オペレーションズ・リサーチ学会2013年春季研究発表会アブストラクト集, 2013
• A retrial queueing model with abandonment and after-call work, 待ち行列シンポジウム「確率モデルとその応用」, 2012
• 利用客が一般許容待ち時間をもつ待ち行列モデルの近似解析, 日本オペレーションズ・リサーチ学会2012年秋季研究発表会アブストラクト集, 2012
• 2方向通信再呼待ち行列の行列解析法による別解, , 日本オペレーションズ・リサーチ学会2012年秋季研究発表会アブストラクト集, 2012
• 途中退去のある待ち行列モデルの近似解析, 日本オペレーションズ・リサーチ学会待ち行列部会, 2011
• 途中退去と後処理のある再呼待ち行列システムの安定条件, 日本オペレーションズ・リサーチ学会2011年秋季研究発表会アブストラクト集, 2011
• Improvement of MPEG-4 transfer quality by SCTP selective retransmission scheme, 待ち行列シンポジウム「確率モデルとその応用」, 2010
• A busy-tone based MAC protocol for ad hoc networks using multiple channels, 待ち行列シンポジウム「確率モデルとその応用」, 2009
• SCTPマルチストリーミングによるMPEG-4データ転送の性能解析, 待ち行列シンポジウム「確率モデルとその応用」, 2008
• インバウンド型コールセンターの近似待ち行列モデル, 日本オペレーションズ・リサーチ学会2008年春季研究発表会, 2008
• An approximate analysis of the effect of customer impatience in a call center queueing model, 待ち行列シンポジウム「確率モデルとその応用」, 2005
• An Effect of Migration Log Losses on the Searching Costs for Mobile Agents, IEICE Technical Report,IT2005-12,pp.67-71, 2005
• 移動ログを補完するMLB方式の提案, 日本シミュレーション学会多次元移動情報通信網自動設計技術ワークショップJSST-MMW2005-06, 2005
• Region Division Assignment2:２次元拡散を適用したVSF-OFCDMにおけるOVSF符号の割り当て法, 第２４回日本シミュレーション学会大会, 2005
• 表現行列の代数関係を用いたMAPに対する計数過程の積率構成法, 日本オペレーションズ・リサーチ学会2005年春季研究発表会, 2005
• Log損失を考慮したモバイルエージェントの検索コストの評価, 電子情報通信学会技術研究報告,IN2004-199～242,Vol.104,No.691,pp.57-61, 2005
• ログ損失を考慮したモバイルエージェントの位置管理手法, 電気学会研究会通信研究会,CMN-05-9～14,2005年1月28日,電気学会研究会資料,pp.13-17, 2005
• An approximate analysis of the effect of customer impatience in a call center queueing model, 待ち行列シンポジウム「確率モデルとその応用」, 2005
• An Effect of Migration Log Losses on the Searching Costs for Mobile Agents, IEICE Technical Report,IT2005-12,pp.67-71, 2005
• A Comparative Study of a Markovian Queueing Model with Impatient Customers, 待ち行列シンポジウム「確率モデルとその応用」, 2004
• 動作特性を利用した移動経路情報消失時の モバイルエージェント探索手法, 第23回日本シミュレーション学会大会, 6月16日～6月17日,東京,早稲田大, 第23回日本シミュレーション学会大会発表論文集, pp.99-102, 2004
• Performance Comparison of OVSF and FOSSIL, 第23回日本シミュレーション学会大会発表論文集,6月16日～6月17日,東京,早稲田大, pp.103-106, 2004
• リアルタイムクラスのQoSを考慮した受付制御方式, 平成16年電気学会 電子情報システム部門大会TC6-1, 9月2日～9月3日,平成16年電気学会 電子情報システム部門大会論文集, pp.153-156, 2004
• A Comparative Study of a Markovian Queueing Model with Impatient Customers, 待ち行列シンポジウム「確率モデルとその応用」, 2004
• Performance Comparison of OVSF and FOSSIL, 第23回日本シミュレーション学会大会発表論文集,6月16日～6月17日,東京,早稲田大, pp.103-106, 2004
• 可変伝送レートを提供するシステムの待ち行列モデルについて－次世代移動体通信システムを例として－, 日本オペレーションズ・リサーチ学会待ち行列部会, 2003
• Last Encouter Routingを用いたアドホック 無線ネットワークのキャパシティ, 日本シミュレーション学会技術研究報告, 多次元移動情報通信網自動設計技術研究会, NTTドコモR& Dセンター, JSST-MM2003,pp.18-23, 2003
• アドホック無線ネットワークのキャパシティ, 平成15年電気学会電子・情報・システム部門大会 講演論文集、TC6-4, 2003
• UWBにおけるアドホック無線ネットワークのキャパシティ, 2003年電子情報通信学会ソサイエティ大会, B-7-82,p.263(CD-ROM), 2003
• Performance Evaluation of Orthogonal Variable-Spreading-Factor Code Assignment Schemes Based on UMTS/IMT-2000 in W-CDMA, 日本シミュレーション学会技術研究報告,第４回多次元移動情報通信網自動設計技術研究会,JSST-MM2002, pp.29-33, 2002
• Performance Analysis of Region Division Assignment of OVSF Codes in WCDMA, The 15th Workshop on Circuits and Systems in Karuizawa,April 22-23,2002. 第１５回回路とシステム（軽井沢）ワークショップ,４月２２日～４月２３日,pp.179-184, 2002
• 移動体通信におけるユーザの移動パターンを考慮した位置登録管理方式の性能評価, 電子情報通信学会技術研究報告,IN2002-31, pp.55-60, 2002
• W-CDMAにおける領域分割OVSF符号割り当ての解析モデル, 日本シミュレーション学会大会,第21回シミュレーション・テクノロジー・コンファレンス, 第２１回計算電気・電子工学シンポジウム, ６月１９日～６月２０日,pp.59-62, 2002
• Performance Evaluation of Orthogonal Variable-Spreading-Factor Code Assignment Schemes Based on UMTS/IMT-2000 in W-CDMA, 日本シミュレーション学会技術研究報告,第４回多次元移動情報通信網自動設計技術研究会,JSST-MM2002, pp.29-33, 2002
• Performance Analysis of Region Division Assignment of OVSF Codes in WCDMA, The 15th Workshop on Circuits and Systems in Karuizawa,April 22-23,2002. 第１５回回路とシステム（軽井沢）ワークショップ,４月２２日～４月２３日,pp.179-184, 2002
• Effects on Gurad Channels on Channel Reservation for Ahead Cells Scheme in One-dimentional Cellular Networks, 日本シミュレーション学会技術研究報告,多次元移動情報通信網自動設計技術研究会,防衛大学校,JSST-MM2001,pp.17-24, 2001
• Dynamic Buffer Allocation for Improving Performance of Credit Flow Control in ATM Networks, 電子情報通信学会2001年ソサイエティ大会,東京都調布市,9月18日～9月21日,pp.21-26, 2001
• A study on multi-server queueing system with Markovian service process, 日本オペレーションズ・リサーチ学会待ち行列部会, 2001
• 通信システムにおけるマルコフ点過程モデルについて, 電子情報通信学会2001年総合大会, 2001
• バーストトラヒック制御方式の近似解析, 情報通信ネットワークの新しい性能評価法に関する総合的研究研究会, 2001
• Effects on Gurad Channels on Channel Reservation for Ahead Cells Scheme in One-dimentional Cellular Networks, 日本シミュレーション学会技術研究報告,多次元移動情報通信網自動設計技術研究会,防衛大学校,JSST-MM2001,pp.17-24, 2001
• Dynamic Buffer Allocation for Improving Performance of Credit Flow Control in ATM Networks, 電子情報通信学会2001年ソサイエティ大会,東京都調布市,9月18日～9月21日,pp.21-26, 2001
• A study on multi-server queueing system with Markovian service process, 日本オペレーションズ・リサーチ学会待ち行列部会, 2001
• 確率的な上界を与える大規模5Gネットワークの評価法, 川村 航平, 河西 憲一, フンドック トゥアン, 待ち行列シンポジウム「確率モデルとその応用」, 21 Jan. 2022, Domestic conference
• 待ち時間制約のある待ち行列モデルの「行列指数形式解」, 河西憲一, 日本オペレーションズ・リサーチ学会待ち行列部会４月例会, Apr. 2022
• 待ち行列研究部会報告, 河西憲一，木村達明, 日本オペレーションズ・リサーチ学会2022年春季研究発表会, 17 Mar. 2022, Domestic conference
• 有限呼源再呼モデルの再呼回数分布に関する考察, Ken'ichi KAWANISHI, THE QUEUEING SYMPOSIUM, STOCHASTIC MODELS AND THEIR APPLICATIONS, 20 Jan. 2023, 18 Jan. 2023, 20 Jan. 2023, Domestic conference
• Placement algorithms for Wi-Fi access points in mobile data offloading, Akihiro KANDA, Ken'ichi KAWANISHI, THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS, Technical Committee on Network Systems, 15 Dec. 2023
• サーバのセットアップが伴う大規模システムの性能評価法, Ken'ichi KAWANISHI, THE QUEUEING SYMPOSIUM, STOCHASTIC MODELS AND THEIR APPLICATIONS, 19 Jan. 2024, 17 Jan. 2024, 19 Jan. 2024, Domestic conference

Industrial Property Rights

• Patent right
• Patent right
• Patent right, Traffic Measurement Method
• Patent right, Calculation method of mear sojourn time for traffic in communication system, its apparatus, and communication networks.

Academic Contribution

• Academic society etc, 19 Apr. 2018, 20 Apr. 2018
• ITC32, Competition etc, 22 Sep. 2020, 24 Sep. 2020, International academic contribution
• Academic society etc, 17 Oct. 2020, 17 Oct. 2020
• Academic society etc, Apr. 2020, 9999
• Competition etc, 22 Jan. 2020, 24 Jan. 2020
• Competition etc, 25 Jan. 2021, 27 Jan. 2021
• Competition etc, 19 Jan. 2022, 21 Jan. 2022, virtual
• Academic society etc, Apr. 2021, Mar. 2022
• Academic society etc, 23 Oct. 2021, 23 Oct. 2021, virtual
• Competition etc, 17 Mar. 2022, 18 Mar. 2022, virtual
• Competition etc, 18 Jan. 2023, 20 Jan. 2023