Ryoichi Kawahara

Publication Activity (10 Years)

Years Active: 1997-2023
Publications (10 Years): 23

Top Topics

Grey Prediction

Reinforcement Learning

Top Venues

IEICE Trans. Commun.

IEEE Trans. Netw. Serv. Manag.

Publications

Kengo Tajiri, Ryoichi Kawahara
Optimizing Data Distribution for Federated Learning Under Bandwidth Constraint. ICC (2023)
Kengo Tajiri, Ryoichi Kawahara, Yoichi Matsuo
Optimizing Edge-Cloud Cooperation for Machine Learning Accuracy Considering Transmission Latency and Bandwidth Congestion. IEICE Trans. Commun. 106 (9) (2023)
Kengo Tajiri, Ryoichi Kawahara
Data Transfer for Balancing Model Convergence and Training Time in Federated Learning. GLOBECOM (2023)
Ryoichi Kawahara, Takuya Yano, Rie Tagyo, Daisuke Ikegami
Network Tomography for Information-Centric Networking. IEICE Trans. Commun. (3) (2022)
Akito Suzuki, Ryoichi Kawahara, Shigeaki Harada
Cooperative Multi-Agent Deep Reinforcement Learning for Dynamic Virtual Network Allocation With Traffic Fluctuations. IEEE Trans. Netw. Serv. Manag. 19 (3) (2022)
Kengo Tajiri, Ryoichi Kawahara, Yoichi Matsuo
Optimizing Edge-Cloud Cooperation for Machine Learning Accuracy Considering Transmission Latency and Bandwidth Congestion. NOMS (2022)
Ryota Nakamura, Ryoichi Kawahara, Takefumi Wakayama, Shigeaki Harada
Virtual Network Control for Power Bills Reduction and Network Stability. IEEE Trans. Netw. Serv. Manag. 19 (4) (2022)
Akito Suzuki, Ryoichi Kawahara, Shigeaki Harada
Cooperative Multi-Agent Deep Reinforcement Learning for Dynamic Virtual Network Allocation. ICCCN (2021)
Shigeaki Harada, Keisuke Ishibashi, Ryoichi Kawahara
Modeling Upper Layer Reaction to QoS Degradation as a Congestion Avoidance Mechanism. IEICE Trans. Commun. (4) (2020)
Akito Suzuki, Ryoichi Kawahara, Masahiro Kobayashi, Shigeaki Harada, Yousuke Takahashi, Keisuke Ishibashi
Extendable NFV-Integrated Control Method Using Reinforcement Learning. IEICE Trans. Commun. (8) (2020)
Keisuke Ishibashi, Shigeaki Harada, Ryoichi Kawahara
Inferring Latent Traffic Demand Offered to an Overloaded Link with Modeling QoS-Degradation Effect. IEICE Trans. Commun. (4) (2019)
Akito Suzuki, Ryoichi Kawahara, Masahiro Kobayashi, Shigeaki Harada, Yousuke Takahashi, Keisuke Ishibashi
Extendable NFV-Integrated Control Method Using Reinforcement Learning. CoRR (2019)
Akio Watanabe, Keisuke Ishibashi, Tsuyoshi Toyono, Keishiro Watanabe, Tatsuaki Kimura, Yoichi Matsuo, Kohei Shiomoto, Ryoichi Kawahara
Workflow Extraction for Service Operation Using Multiple Unstructured Trouble Tickets. IEICE Trans. Inf. Syst. (4) (2018)
Hiroki Ikeuchi, Akio Watanabe, Takehiro Kawata, Ryoichi Kawahara
Root-Cause Diagnosis Using Logs Generated by User Actions. GLOBECOM (2018)
Yoichi Matsuo, Yuusuke Nakano, Akio Watanabe, Keishiro Watanabe, Keisuke Ishibashi, Ryoichi Kawahara
Root-Cause Diagnosis for Rare Failures Using Bayesian Network with Dynamic Modification. ICC (2018)
Rie Tagyo, Daisuke Ikegami, Ryoichi Kawahara
Network Tomography Using Routing Probability for Virtualized Network. ICC (2018)
Yasuhiro Ikeda, Keisuke Ishibashi, Yuusuke Nakano, Keishiro Watanabe, Ryoichi Kawahara
Anomaly Detection and Interpretation using Multimodal Autoencoder and Sparse Optimization. CoRR (2018)
Akito Suzuki, Masahiro Kobayashi, Yousuke Takahashi, Shigeaki Harada, Keisuke Ishibashi, Ryoichi Kawahara
Extendable NFV-Integrated Control Method Using Reinforcement Learning. ICC (2018)
Ryoichi Shinkuma, Shingo Kato, Masahiro Kanbayashi, Yasuhiro Ikeda, Ryoichi Kawahara, Takanori Hayashi
System design for predictive road-traffic information delivery using edge-cloud computing. CCNC (2018)
Hiroshi Saito, Ryoichi Kawahara
Geometrical Characterization of Offloading through Wireless LANs. IEEE Trans. Mob. Comput. 16 (1) (2017)
Hiroshi Saito, Hirotada Honda, Ryoichi Kawahara
Disaster avoidance control against heavy rainfall. INFOCOM (2017)
Ryoichi Kawahara, Hiroshi Saito
Name Resolution Based on Set of Attribute-Value Pairs of Real-World Information. IEICE Trans. Commun. (1) (2017)
Tatsuaki Kimura, Hiroshi Saito, Hirotada Honda, Ryoichi Kawahara
Modeling Urban ITS Communication via Stochastic Geometry Approach. VTC Fall (2016)
Yasuhiro Ikeda, Ryoichi Kawahara, Hiroshi Saito
Homology-based metaheuristics for cell planning with macroscopic diversity using sector antennas. ICC (2015)
Hiroshi Saito, Ryoichi Kawahara
Theoretical Evaluation of Offloading through Wireless LANs. CoRR (2014)
Xinjie Guan, Xili Wan, Ryoichi Kawahara, Hiroshi Saito
An Online Framework for Flow Round Trip Time Measurement. IEICE Trans. Commun. (10) (2014)
Ryoichi Kawahara, Yoshihide Tonomura
Mobile QoS tomography using compressed sensing. International Teletraffic Congress (2014)
Yasuhiro Ikeda, Hiroshi Saito, Ryoichi Kawahara
Cell Planning with Macroscopic Diversity: Optimal Cell Deployment and SINR Evaluation under Frequency Scheduling. VTC Spring (2014)
Naoya Maki, Ryoichi Shinkuma, Tatsuya Mori, Noriaki Kamiyama, Ryoichi Kawahara
A periodic combined-content distribution mechanism in peer-assisted content delivery networks. Kaleidoscope (2013)
Naoya Maki, Takayuki Nishio, Ryoichi Shinkuma, Tatsuro Takahashi, Tatsuya Mori, Noriaki Kamiyama, Ryoichi Kawahara
Expected traffic reduction by content-oriented incentive in peer-assisted content delivery networks. ICOIN (2013)
Noriaki Kamiyama, Tatsuya Mori, Ryoichi Kawahara, Shigeaki Harada, Haruhisa Hasegawa
Analyzing influence of network topology on designing ISP-operated CDN. Telecommun. Syst. 52 (2) (2013)
Noriaki Kamiyama, Ryoichi Kawahara, Tatsuya Mori, Haruhisa Hasegawa
Multicast Pre-Distribution VoD System. IEICE Trans. Commun. (6) (2013)
Ryoichi Kawahara, Tetsuya Takine, Tatsuya Mori, Noriaki Kamiyama, Keisuke Ishibashi
Mean-variance relationship of the number of flows in traffic aggregation and its application to traffic management. Comput. Networks 57 (6) (2013)
Noriaki Kamiyama, Tatsuya Mori, Ryoichi Kawahara, Haruhisa Hasegawa
Optimally Designing ISP-Operated CDN. IEICE Trans. Commun. (3) (2013)
Yasuhiro Ikeda, Ryoichi Kawahara, Noriaki Kamiyama, Tatsuaki Kimura, Tatsuya Mori
Analyzing Characteristics of TCP Quality Metrics with Respect to Type of Connection through Measured Traffic Data. IEICE Trans. Commun. (2) (2013)
Noriaki Kamiyama, Ryoichi Kawahara, Haruhisa Hasegawa
Optimum profit allocation in coalitional VoD service. Comput. Networks 57 (15) (2013)
Noriaki Kamiyama, Tatsuya Mori, Ryoichi Kawahara, Shigeaki Harada
Optimally Identifying Worm-Infected Hosts. IEICE Trans. Commun. (8) (2013)
Noriaki Kamiyama, Tatsuya Mori, Ryoichi Kawahara
Autonomic load balancing of flow monitors. Comput. Networks 57 (3) (2013)
Noriaki Kamiyama, Ryoichi Kawahara
Analysis of content charge by ISPs. IM (2013)
Noriaki Kamiyama, Ryoichi Kawahara, Tatsuya Mori, Haruhisa Hasegawa
Effect of Limiting Pre-Distribution and Clustering Users on Multicast Pre-Distribution VoD. IEICE Trans. Commun. (1) (2013)
Xinjie Guan, Xili Wan, Ryoichi Kawahara, Hiroshi Saito
An online framework for flow round trip time measurement. International Teletraffic Congress (2013)
Noriaki Kamiyama, Tatsuya Mori, Ryoichi Kawahara
Autonomic load balancing for flow monitoring. ICC (2012)
Naoya Maki, Takayuki Nishio, Ryoichi Shinkuma, Tatsuya Mori, Noriaki Kamiyama, Ryoichi Kawahara, Tatsuro Takahashi
Traffic Engineering of Peer-Assisted Content Delivery Network with Content-Oriented Incentive Mechanism. IEICE Trans. Inf. Syst. (12) (2012)
Ryoichi Kawahara, Tatsuya Mori, Takeshi Yada, Noriaki Kamiyama
Analyzing and Reducing the Impact of Traffic on Large-Scale NAT. IEICE Trans. Commun. (9) (2012)
Keisuke Ishibashi, Ryoichi Kawahara, Tatsuya Mori, Tsuyoshi Kondoh, Shoichiro Asano
Effects of Sampling and Spatio/Temporal Granularity in Traffic Monitoring on Anomaly Detectability. IEICE Trans. Commun. (2) (2012)
Noriaki Kamiyama, Ryoichi Kawahara, Tatsuya Mori, Haruhisa Hasegawa
Limiting pre-distribution and clustering users on multicast pre-distribution VoD. Integrated Network Management (2011)
Ryoichi Kawahara, Keisuke Ishibashi, Tatsuya Mori, Noriaki Kamiyama, Shigeaki Harada, Haruhisa Hasegawa, Shoichiro Asano
Detection accuracy of network anomalies using sampled flow statistics. Int. J. Netw. Manag. 21 (6) (2011)
Ryoichi Kawahara, Noriaki Kamiyama, Tatsuya Mori, Haruhisa Hasegawa
Performance evaluation of peer-assisted content distribution. CCNC (2011)
Ryoichi Kawahara, Shigeaki Harada, Noriaki Kamiyama, Tatsuya Mori, Haruhisa Hasegawa, Akihiro Nakao
Traffic Engineering Using Overlay Network. ICC (2011)
Noriaki Kamiyama, Ryoichi Kawahara, Tatsuya Mori, Shigeaki Harada, Haruhisa Hasegawa
Parallel video streaming optimizing network throughput. Comput. Commun. 34 (10) (2011)
Noriaki Kamiyama, Ryoichi Kawahara, Tatsuya Mori, Shigeaki Harada, Haruhisa Hasegawa
Optimally designing caches to reduce P2P traffic. Comput. Commun. 34 (7) (2011)
Tatsuya Mori, Ryoichi Kawahara, Haruhisa Hasegawa, Shinsuke Shimogawa
Characterizing Traffic Flows Originating from Large-Scale Video Sharing Services. TMA (2010)
Noriaki Kamiyama, Ryoichi Kawahara, Tatsuya Mori, Shigeaki Harada, Haruhisa Hasegawa
Impact of topology on parallel video streaming. NOMS (2010)
Noriaki Kamiyama, Ryoichi Kawahara, Tatsuya Mori, Shigeaki Harada, Haruhisa Hasegawa
Optimally Designing Capacity and Location of Caches to Reduce P2P Traffic. ICC (2010)
Noriaki Kamiyama, Ryoichi Kawahara, Haruhisa Hasegawa
Profit Allocation in Coalitional VoD Service. MASCOTS (2010)
Tatsuya Mori, Noriaki Kamiyama, Shigeaki Harada, Haruhisa Hasegawa, Ryoichi Kawahara
Improving Deployability of Peer-Assisted CDN Platform with Incentive. GLOBECOM (2009)
Ryoichi Kawahara, Eng Keong Lua, Masato Uchida, Satoshi Kamei, Hideaki Yoshino
On the Quality of Triangle Inequality Violation Aware Routing Overlay Architecture. INFOCOM (2009)
Ryoichi Kawahara, Satoshi Kamei, Noriaki Kamiyama, Haruhisa Hasegawa, Hideaki Yoshino, Eng Keong Lua, Akihiro Nakao
A Method of Constructing QoS Overlay Network and Its Evaluation. GLOBECOM (2009)
Ryoichi Kawahara, Tatsuya Mori, Noriaki Kamiyama, Shigeaki Harada, Haruhisa Hasegawa
Adaptive Bandwidth Control to Handle Long-Duration Large Flows. ICC (2009)
Noriaki Kamiyama, Tatsuya Mori, Ryoichi Kawahara, Shigeaki Harada
Optimum Identification of Worm-Infected Hosts. IPOM (2008)
Yasuo Tamura, Shoji Kasahara, Yutaka Takahashi, Satoshi Kamei, Ryoichi Kawahara
Inconsistency of logical and physical topologies for overlay networks and its effect on file transfer delay. Perform. Evaluation 65 (10) (2008)
Shigeaki Harada, Ryoichi Kawahara, Tatsuya Mori, Noriaki Kamiyama, Haruhisa Hasegawa, Hideaki Yoshino
A Method of Detecting Network Anomalies in Cyclic Traffic. GLOBECOM (2008)
Yutaka Hirokawa, Kimihiro Yamamoto, Shigeaki Harada, Ryoichi Kawahara
Detection of Leaps/sLumps in Traffic Volume of Internet Backbone. APNOMS (2008)
Ryoichi Kawahara, Noriaki Kamiyama, Shigeaki Harada, Haruhisa Hasegawa, Shoichiro Asano
Identifying Anomalous Traffic Sources Using Flow Statistics. GLOBECOM (2008)
Noriaki Kamiyama, Tatsuya Mori, Ryoichi Kawahara, Shigeaki Harada, Hideaki Yoshino
Extracting Worm-Infected Hosts Using White List. SAINT (2008)
Ryoichi Kawahara, Tatsuya Mori, Keisuke Ishibashi, Noriaki Kamiyama, Hideaki Yoshino
Packet Sampling TCP Flow Rate Estimation and Performance Degradation Detection Method. IEICE Trans. Commun. (5) (2008)
Keisuke Ishibashi, Tatsuya Mori, Ryoichi Kawahara, Yutaka Hirokawa, Atsushi Kobayashi, Kimihiro Yamamoto, Hitoaki Sakamoto, Shoichiro Asano
Finding Cardinality Heavy-Hitters in Massive Traffic Data and Its Application to Anomaly Detection. IEICE Trans. Commun. (5) (2008)
Noriaki Kamiyama, Tatsuya Mori, Ryoichi Kawahara, Eng Keong Lua
Efficient Timeout Checking Mechanism for Traffic Control. ICCCN (2007)
Tatsuya Mori, Ryoichi Kawahara, Noriaki Kamiyama, Shigeaki Harada
Inferring Original Traffic Pattern from Sampled Flow Statistics. SAINT Workshops (2007)
Tatsuya Mori, Tetsuya Takine, Jianping Pan, Ryoichi Kawahara, Masato Uchida, Shigeki Goto
Identifying Heavy-Hitter Flows from Sampled Flow Statistics. IEICE Trans. Commun. (11) (2007)
Ryoichi Kawahara, Tatsuya Mori, Noriaki Kamiyama, Shigeaki Harada, Shoichiro Asano
A Study on Detecting Network Anomalies Using Sampled Flow Statistics. SAINT Workshops (2007)
Noriaki Kamiyama, Tatsuya Mori, Ryoichi Kawahara
Simple and Adaptive Identification of Superspreaders by Flow Sampling. INFOCOM (2007)
Ryoichi Kawahara, Keisuke Ishibashi, Tatsuya Mori, Noriaki Kamiyama, Shigeaki Harada, Shoichiro Asano
Detection Accuracy of Network Anomalies Using Sampled Flow Statistics. GLOBECOM (2007)
Keisuke Ishibashi, Tatsuya Mori, Ryoichi Kawahara, Katsuyasu Toyama, Shunichi Osawa, Shoichiro Asano
2-D Bitmap for Summarizing Inter-Host Communication Patterns. SAINT Workshops (2007)
Ryoichi Kawahara, Tatsuya Mori, Takeo Abe
QoS control to handle long-duration large flows and its performance evaluation. ICC (2006)
Keisuke Ishibashi, Ryoichi Kawahara, Takuya Asaka, Masaki Aida, Satoshi Ono, Shoichiro Asano
Detection of TCP Performance Degradation Using Link Utilization Statistics. IEICE Trans. Commun. (1) (2006)
Ryoichi Kawahara, Tatsuya Mori, Keisuke Ishibashi, Noriaki Kamiyama, Takeo Abe
Estimating Flow Rate from Sampled Packet Streams for Detection of Performance Degradation at TCP Flow Level. GLOBECOM (2006)
Masato Uchida, Satoshi Kamei, Ryoichi Kawahara
Performance Evaluation of QoS-Aware Routing in Overlay Network. ICOIN (2006)
Keisuke Ishibashi, Tatsuya Mori, Ryoichi Kawahara, Yutaka Hirokawa, Atsushi Kobayashi, Kimihiro Yamamoto, Hitoaki Sakamoto
Estimating Top N Hosts in Cardinality Using Small Memory Resources. ICDE Workshops (2006)
Masato Uchida, Satoshi Kamei, Ryoichi Kawahara, Takeo Abe
QoS-Aware Overlay Routing with Limited Number of Alternative Route Candidates and Its Evaluation. IEICE Trans. Commun. (9) (2006)
Ryoichi Kawahara, Keisuke Ishibashi, Tatsuya Mori, Toshihisa Ozawa, Takeo Abe
Method of Bandwidth Dimensioning and Management for Aggregated TCP Flows with Heterogeneous Access Links. IEICE Trans. Commun. (12) (2005)
Ryoichi Kawahara, Keisuke Ishibashi, Takuya Asaka, Shuichi Sumita, Takeo Abe
A Method of Bandwidth Dimensioning and Management Using Flow Statistics. IEICE Trans. Commun. (2) (2005)
Ryoichi Kawahara, Keisuke Ishibashi, Takuya Asaka, Shuichi Sumita, Takeo Abe
A method of bandwidth dimensioning and management using flow statistics [IP networks]. GLOBECOM (2004)
Tatsuya Mori, Ryoichi Kawahara, Shozo Naito, Shigeki Goto
On the Characteristics of Internet Traffic Variability: Spikes and Elephants. IEICE Trans. Inf. Syst. (12) (2004)
Keisuke Ishibashi, Ryoichi Kawahara, Aida Takuya, Asaka Masaki
Detection of TCP performance degradation using link utilization statistics. GLOBECOM (2004)
Tatsuya Mori, Ryoichi Kawahara, Shozo Naito, Shigeki Goto
On the Characteristics of Internet Traffic Variability: Spikes and Elephants. SAINT (2004)
Tatsuya Mori, Masato Uchida, Ryoichi Kawahara, Jianping Pan, Shigeki Goto
Identifying elephant flows through periodically sampled packets. Internet Measurement Conference (2004)
Ryoichi Kawahara, Keisuke Ishibashi, Takuya Asaka, Katsunori Ori
A method of IP traffic management using TCP flow statistics. GLOBECOM (2003)
Tatsuya Mori, Ryoichi Kawahara, Shozo Naito
Analysis of Non-Gaussian Nature of Network Traffic and its Implication on Network Performance CoRR (2002)
Tatsuya Mori, Ryoichi Kawahara, Shozo Naito
Analysis of Non-Gaussian Nature of Network Traffic CoRR (2002)
Keiko Yoshihara, Toshihiro Suzuki, Akira Miura, Ryoichi Kawahara
Evaluation of congestion control of the PDC mobile packet data communication system. GLOBECOM (2002)
Ryoichi Kawahara, Naohisa Komatsu
Dynamically weighted queueing for fair bandwidth allocation and its performance analysis. ICC (2002)
Ryoichi Kawahara, Keisuke Ishibashi, Toshiyuki Hirano, Hiroshi Saito, Hisaki Ohara, Daisuke Satoh, Shoichiro Asano, Jun Matsukata
Traffic measurement and analysis in an ATM-based internet backbone. Comput. Commun. 24 (15-16) (2001)
Ryoichi Kawahara, Hiroshi Saito, Masatoshi Kawarasaki
Characteristics of ABR explicit rate control algorithms in WAN environments and an ABR control algorithm suitable for public networks. Int. J. Commun. Syst. 11 (3) (1998)
Ryoichi Kawahara, Arata Koike, Mika Ishizuka, Masahito Koshiishi, Masatoshi Kawarasaki
Characteristics of ABR Explicit Rate Control Algorithms in WAN Environment. ICC (3) (1997)