Ryoichi Kawahara

Profile Information

Affiliation: Toyo University

Degree: 博士（工学）(早稲田大学)

Researcher number: 40822979
J-GLOBAL ID: 201801013826406367
researchmap Member ID: B000292423

Research Areas

Informatics / Information networks /

Papers

124

Link delay estimation under undeterministic routing using neural network

Ushizuka Yuta, Kawahara Ryoichi

IEICE Communications Express, 13(1) 5-8, Jan 1, 2024 Peer-reviewed
Optimizing Edge-Cloud Cooperation for Machine Learning Accuracy Considering Transmission Latency and Bandwidth Congestion.

Kengo Tajiri, Ryoichi Kawahara, Yoichi Matsuo

IEICE Transactions on Communications, 106(9) 827-836, Sep, 2023 Peer-reviewed
Optimizing Data Distribution for Federated Learning Under Bandwidth Constraint.

Kengo Tajiri, Ryoichi Kawahara

ICC, 3732-3737, 2023 Peer-reviewed
Data Transfer for Balancing Model Convergence and Training Time in Federated Learning.

Kengo Tajiri, Ryoichi Kawahara

GLOBECOM, 6777-6782, 2023 Peer-reviewed
A general-purpose calculation module for route optimization in virtualized networks

Takefumi Wakayama, Ryoichi Kawahara

IEICE COMMUNICATIONS EXPRESS, 11(12) 840-845, 2022 Peer-reviewed
Optimizing Edge-Cloud Cooperation for Machine Learning Accuracy Considering Transmission Latency and Bandwidth Congestion.

Kengo Tajiri, Ryoichi Kawahara, Yoichi Matsuo

NOMS, 1-9, 2022 Peer-reviewed
Network Tomography for Information-Centric Networking

Ryoichi Kawahara, Takuya Yano, Rie Tagyo, Daisuke Ikegami

IEICE Trans. Commun., 105-B(3) 259-269, 2022 Peer-reviewed
Cooperative Multi-Agent Deep Reinforcement Learning for Dynamic Virtual Network Allocation with Traffic Fluctuations

Akito Suzuki, Ryoichi Kawahara, Shigeaki Harada

IEEE Transactions on Network and Service Management, 19(3) 1982-2000, 2022 Peer-reviewed
Virtual Network Control for Power Bills Reduction and Network Stability

Ryota Nakamura, Ryoichi Kawahara, Takefumi Wakayama, Shigeaki Harada

IEEE Transactions on Network and Service Management, 19(4) 4338-4349, 2022 Peer-reviewed
Network tomography using routing probability for undeterministic routing

Rie Tagyo, Daisuke Ikegami, Ryoichi Kawahara

IEICE Transactions on Communications, E104B(7) 837-848, 2021 Peer-reviewed
Cooperative Multi-Agent Deep Reinforcement Learning for Dynamic Virtual Network Allocation.

Akito Suzuki, Ryoichi Kawahara, Shigeaki Harada

30th International Conference on Computer Communications and Networks(ICCCN), 1-11, 2021 Peer-reviewed
Extendable NFV-Integrated Control Method Using Reinforcement Learning.

Akito Suzuki, Ryoichi Kawahara, Masahiro Kobayashi, Shigeaki Harada, Yousuke Takahashi, Keisuke Ishibashi

IEICE Trans. Commun., 103-B(8) 826-841, 2020 Peer-reviewed
Modeling Upper Layer Reaction to QoS Degradation as a Congestion Avoidance Mechanism

HARADA Shigeaki, ISHIBASHI Keisuke, KAWAHARA Ryoichi

IEICE Transactions on Communications, 103(4) 302-311, 2020 Peer-reviewedInvited
Inferring Latent Traffic Demand Offered to an Overloaded Link with Modeling QoS-Degradation Effect

ISHIBASHI Keisuke, HARADA Shigeaki, KAWAHARA Ryoichi

IEICE Transactions on Communications, 102(4) 790-798, 2019 Peer-reviewed
Human-Assisted Online Anomaly Detection with Normal Outlier Retraining

Yasuhiro Ikeda, Keisuke Ishibashi, Yusuke Nakano, Keishiro Watanabe, Kengo Tajiri, Ryoichi Kawahara

Outlier Detection De-constructed (ODD) v5.0, ACM SIGKDD 2018 Workshop, Poster session, Aug, 2018 Peer-reviewed
Workflow extraction for service operation using multiple unstructured trouble tickets

Akio Watanabe, Keisuke Ishibashi, Tsuyoshi Toyono, Keishiro Watanabe, Tatsuaki Kimura, Yoichi Matsuo, Kohei Shiomoto, Ryoichi Kawahara

IEICE Transactions on Information and Systems, E101D(4) 1030-1041, Apr 1, 2018 Peer-reviewed
System design for predictive road-traffic information delivery using edge-cloud computing

Ryoichi Shinkuma, Shingo Kato, Masahiro Kanbayashi, Yasuhiro Ikeda, Ryoichi Kawahara, Takanori Hayashi

CCNC 2018 - 2018 15th IEEE Annual Consumer Communications and Networking Conference, 2018- 1-6, Mar 16, 2018 Peer-reviewed
Application of AI to Network Operation

Kawahara Ryoichi, Watanabe Keishiro, Harada Shigeaki, Kawata Takehiro

IEICE Communications Society Magazine, 12(1) 29-38, 2018 Peer-reviewedInvited
Network Tomography Using Routing Probability for Virtualized Network.

Rie Tagyo, Daisuke Ikegami, Ryoichi Kawahara

2018 IEEE International Conference on Communications, ICC 2018, Kansas City, MO, USA, May 20-24, 2018, 1-7, 2018 Peer-reviewed
Extendable NFV-Integrated Control Method Using Reinforcement Learning.

Akito Suzuki, Masahiro Kobayashi, Yousuke Takahashi, Shigeaki Harada, Keisuke Ishibashi, Ryoichi Kawahara

2018 IEEE International Conference on Communications, ICC 2018, Kansas City, MO, USA, May 20-24, 2018, 1-7, 2018 Peer-reviewed

Misc.

190

環境負荷を考慮した仮想ネットワーク制御手法—Virtual Network Control Method Considering Environmental Load

中村亮太, 川原亮一, 原田薫明

電子情報通信学会誌 = The journal of the Institute of Electronics, Information and Communication Engineers, 106(6) 490-495, Jun, 2023
Creating new value by leveraging network-ai technology in service operations

Keishiro Watanabe, Yasuhiro Ikeda, Yuusuke Nakano, Keisuke Ishibashi, Ryoichi Kawahara, Satoshi Suzuki

NTT Technical Review, 16(6), Jun, 2018
Classifying OSes on User Devices Using the Similarity of DNS Query Sets

117(460) 1-4, Mar 1, 2018
オートエンコーダを用いた異常検知におけるモデル再学習手法—Retraining Anomaly Detection Model using Autoencoder—情報ネットワーク

池田泰弘, 石橋圭介, 中野雄介, 渡辺敬志郎, 川原亮一

電子情報通信学会技術研究報告 = IEICE technical report : 信学技報, 117(397) 77-82, Jan, 2018
Anomaly Detection and Interpretation using Multimodal Autoencoder and Sparse Optimization.

Yasuhiro Ikeda, Keisuke Ishibashi, Yuusuke Nakano, Keishiro Watanabe, Ryoichi Kawahara

CoRR, abs/1812.07136, 2018
System design for cooperative edge-cloud computing (モバイルネットワークとアプリケーション)

新熊亮一, 加藤槙悟, 上林将大, 池田泰弘, 川原亮一, 林孝典

電子情報通信学会技術研究報告 = IEICE technical report : 信学技報, 117(71) 29-32, Jun 1, 2017
B-7-36 Network graph contraction method for evaluating disaster's impact on networks

Kawahara Ryoichi, Saito Hiroshi

Proceedings of the IEICE General Conference, 2016(2) 169-169, Mar 1, 2016
ITSに向けた無線干渉評価モデルの検討

木村達明, 本多泰理, 川原亮一, 斎藤洋

電子情報通信学会大会講演論文集(CD-ROM), 2016 ROMBUNNO.B‐7‐51, Mar 1, 2016
B-7-56 Optimal cell planning technique based on homology under macroscopic diversity with sector antennas

Ikeda Yasuhiro, Kawahara Ryoichi, Saito Hiroshi

Proceedings of the IEICE General Conference, 2015(2) 206-206, Feb 24, 2015
BS-3-2 Searching algorithm for name resolution based on set of attribute-value pairs of real-world information

Kawahara Ryoichi, Saito Hiroshi

Proceedings of the Society Conference of IEICE, 2014(2) "S-2"-"S-3", Sep 9, 2014
B-7-25 Outline of Disaster Avoidance Control

Saito Hiroshi, Kawahara Ryoichi

Proceedings of the Society Conference of IEICE, 2014(2) 82-82, Sep 9, 2014
B-7-74 A study on mobile QoS tomography using compressed sensing

Kawahara Ryoichi, Saito Hiroshi, Tonomura Yoshihide

Proceedings of the IEICE General Conference, 2014(2) 249-249, Mar 4, 2014
B-7-73 Optimal cell planning technique with macroscopic diversity

Ikeda Yasuhiro, Saito Hiroshi, Kawahara Ryoichi

Proceedings of the IEICE General Conference, 2014(2) 248-248, Mar 4, 2014
Name resolution using hierarchical structure of each attribute in real world information

Kawahara Ryoichi, Saito Hiroshi

Proceedings of the Society Conference of IEICE, 2013(2) 123-123, Sep 3, 2013
Name resolution based on a set of attribute-value pairs in real world information

KAWAHARA Ryoichi, SAITO Hiroshi

IEICE technical report. Information networks, 113(36) 65-70, May 16, 2013
B-7-53 Multiple naming using real world information and name resolution

Kawahara Ryoichi, Saito Hiroshi

Proceedings of the IEICE General Conference, 2013(2) 197-197, Mar 5, 2013
Simulation Study of Traffic Reduction by Combining Content Files in Peer-assisted Content Delivery Networks

MAKI Naoya, SHINKUMA Ryoichi, MORI Tatsuya, KAMIYAMA Noriaki, KAWAHARA Ryoichi, TAKAHASHI Tatsuro

Technical report of IEICE. CQ, 112(218) 1-6, Sep 27, 2012
Topic Extraction Method by Semi-Supervised Latent Dirichlet Allocation for Real-Time Recommendation

IKEDA Yasuhiro, KAWAHARA Ryoichi, SAITO Hiroshi

112(83) 35-40, Jun 12, 2012
Impact of Multicast Pre-distribution on Networks

35(34) 17-22, Sep, 2011
Impact of Multicast Pre-distribution on Networks

KAMIYAMA Noriaki, YOKOTA Kenji, KAWAHARA Ryoichi, MORI Tatsuya

IEICE technical report, 111(202) 1-6, Sep 1, 2011

Research Projects

サイバーフィジカル同時最適化のためのネットワーク制御

科学研究費助成事業, 基盤研究(C), 日本学術振興会, Apr, 2023 - Mar, 2026

川原亮一, 木村達明

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