Faculty Profiles - MURASE Tutomu

Papers - MURASE Tutomu

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P Cooperative Mobility Control for Public Mesh Network Reviewed

Yudai Shibuya, Yohei Hasegawa, Hiroyasu Obata, Tutomu Murase

2023 IEEE International Conference on Consumer Electronics (ICCE), ( 1--6 ) 2023.1

Optimal dynamic power allocation based on multiuser cooperative mobility for energy efficiency Reviewed

Jiquan Xie, Takeshi Hirai, Yulan Gao, Tutomu Murase

IEEE CCNC2023 ( 6217 - 6223 ) 2023.1

AP Connection Method Considering Interference for Maximizing System Throughput Using Potential Game Reviewed

Yu Kato, Sumiko Miyata, Jiquan Xie and Tutomu Murase

IEEE CCNC2023 ( 6218 - 6223 ) 2023.1

athRakeTCP: Available Bandwidth Estimation Using Multiple TCP Connections for Passing through Firewalls Reviewed

N. Ito, T. Oshiba, K. Satoda and T. Murase

2023 IEEE International Conference on Consumer Electronics (ICCE), ( 1--6 ) 2023.1

Mobility Control of Avoiding Interference for Autonomous Mobile Robot Ad Hoc Networks Reviewed

K.Makino, T.Hirai and T.Murase

2023 IEEE International Conference on Consumer Electronics (ICCE), ( 1--6 ) 2023.1

P Cooperative Mobility Control for Public Mesh Network Reviewed

Yudai Shibuya, Yohei Hasegawa, Hiroyasu Obata, Tutomu Murase

2023 IEEE International Conference on Consumer Electronics (ICCE), ( 1--6 ) 2023.1

Optimal dynamic power allocation based on multiuser cooperative mobility for energy efficiency Reviewed

Jiquan Xie, Takeshi Hirai, Yulan Gao, Tutomu Murase

IEEE CCNC2023 ( 6217 - 6223 ) 2023.1

PathRakeTCP: Available Bandwidth Estimation Using Multiple TCP Connections for Passing through Firewalls Reviewed

Ito, N; Oshiba, T; Satoda, K; Murase, T

2023 IEEE INTERNATIONAL CONFERENCE ON CONSUMER ELECTRONICS, ICCE Vol. 2023-January 2023

Authorship：Last author,　Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Digest of Technical Papers - IEEE International Conference on Consumer Electronics

In this paper, we propose PathRakeTCP, a method to estimate available bandwidth even if there are firewalls on the communication path that reject UDP communication. PathRakeTCP is one of the so-called packet train methods that estimates the available bandwidth by transmitting multiple probing packets. Firewalls often allow TCP communication to pass through. PathRakeTCP can pass through the firewalls because the packet train is composed of TCP packets. Many conventional packet train methods use UDP packets, which allow precise control over the transmission timing of each probing packet. This is because precise transmission timing control is essential for accurate available bandwidth estimation. On the other hand, if a packet train of TCP packets is simply transmitted, the transmission timing of each probing packet will be disrupted by TCP congestion control. This is a new problem not encountered in the conventional methods that use UDP packets. To solve the above problem, PathRakeTCP establishes a TCP connection for each probing packet and transmits only one packet at each TCP connection. To demonstrate that PathRakeTCP can precisely control the transmission timing of each TCP packet, an experimental evaluation is conducted with a real testbed. The experimental results show that the estimation error of PathRakeTCP is comparable to that of the packet train method with UDP packets.

DOI： 10.1109/ICCE56470.2023.10043399

Web of Science

Scopus

Optimal dynamic power allocation based on multiuser cooperative mobility for energy efficiency Reviewed

Xie, JQ; Hirai, T; Gao, YL; Murase, T

2023 IEEE 20TH CONSUMER COMMUNICATIONS & NETWORKING CONFERENCE, CCNC Vol. 2023-January page： 593 - 598 2023

Authorship：Last author,　Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Proceedings - IEEE Consumer Communications and Networking Conference, CCNC

This paper proposes an optimal dynamic transmission power allocation mechanism for multiple users to maximize mobile ad hoc networks (MANETs) energy efficiency. With the widespread adoption of the internet of things (IoT), energy efficiency is a crucial metric in MANETs constrained by the battery capacity of portable devices. Specifically, a practical scheme needs to be explored that ensures the quality of service (QoS) while minimizing battery costs. Previous studies mainly focus on designing power-manageable components and achieving predictive mechanisms at the circuit or system layer. In contrast to the traditional approaches, we jointly consider power management and multiuser cooperative mobility for energy efficiency maximization. On the one hand, we formulate the dynamic power allocation schemes with multiuser cooperative mobility strategies into the infinite-horizon time average problems. On the other hand, an algorithm based on Lyapunov optimization is developed to obtain the optimum, i.e., dynamic power allocation based on the multiuser cooperative mobility (DPA-MCM) algorithm. Numerical simulations show that the proposed algorithm improves the energy efficiency by up to 27.84 % compared to the previous method, demonstrating the effectiveness.

DOI： 10.1109/CCNC51644.2023.10060580

Web of Science

Scopus

AP Connection Method Considering Interference for Maximizing System Throughput Using Potential Game Reviewed

Kato, Y; Xie, JQ; Murase, T; Miyata, S

2023 IEEE 20TH CONSUMER COMMUNICATIONS & NETWORKING CONFERENCE, CCNC Vol. 2023-January page： 305 - 308 2023

Language：English Publishing type：Research paper (scientific journal) Publisher：Proceedings - IEEE Consumer Communications and Networking Conference, CCNC

For multi-transmission rate environments, access point (AP) connection methods have been proposed for maximizing system throughput, which is the throughput of an entire system, on the basis of the cooperative behavior of users. These methods derive optimal positions for the cooperative behavior of users, which means that new users move to improve the system throughput when connecting to an AP. Typically, the arrival of two or more new users causes signal interference for other users. Specifically, traditional methods have not considered interference and the number of allowable mobile positions is so large that it is difficult to find the optimal position to maximize system throughput. In this paper, we propose an AP connection method that maximizes system throughput by considering interference between users, with a potential game model. This game can find at least one optimal user position. Moreover, numerical analyses show the effectiveness of our method.

DOI： 10.1109/CCNC51644.2023.10060520

Web of Science

Scopus

駐停車中の車で構成されたアドホックネットワークにおけるユーザ移動制御方法の最適移動ノード選択

橋本涼雅, 牧戸知史, 村瀬　勉

電子情報通信学会情報ネットワーク研究会 ( IN2022-42 ) 2022.10

駐停車中の車で構成されたアドホックネットワークにおけるユーザ移動制御方法の最適移動ノード選択

橋本涼雅, 牧戸知史, 村瀬　勉

電子情報通信学会情報ネットワーク研究会 ( IN2022-42 ) 2022.10

Minimizing the monetary penalty and energy cost of server migration service Reviewed

Yukinobu Fukushima, Tatsuya Suda, Tutomu Murase, Yuya Tarutani, Tokumi Yokohira

Transactions on Emerging Telecommunications Technologies Vol. 33 ( 9 ) 2022.9

Language：English Publishing type：Research paper (scientific journal)

Current IaaS (infrastructure as a service) cloud service may not satisfy communication QoS (quality of service) requirements of delay-sensitive network applications, if there is a significant physical distance between a server of the network application (NetApp server) at a data center and its network application clients (NetApp clients). In order to improve communication QoS of NetApp clients, we propose server migration service (SMS) in this article. SMS allows NetApp servers to migrate among different locations in the network (1) to optimally locate themselves in relation to NetApp clients and mitigate the QoS degradation caused by location-related factors (ie, propagation delays on network links) and (2) to optimally distribute traffic load over routers and processing load over (physical) computers and decrease the energy consumption. We develop a mixed-integer programming model that determines when and to which locations NetApp servers migrate to minimize the total operating cost of SMS, that is, the sum of the monetary penalty incurred due to QoS violation and energy cost incurred due to energy consumption, while preventing NetApp servers from excessively migrating and adversely impacting QoS of the non-SMS service that share the resource of the substrate network with SMS. Simulation results show that the model developed in this article achieves up to 42% lower total operating cost of SMS compared to the model that only minimizes the monetary penalty of SMS without considering the energy cost of SMS.

DOI： 10.1002/ett.4511

Web of Science

Scopus

Minimizing the monetary penalty and energy cost of server migration service Reviewed International coauthorship

Yukinobu Fukushima, Tatsuya Suda, Tutomu Murase, Yuya Tarutani, Tokumi Yokohira

Transactions on Emerging Telecommunications Technologies Vol. 33 ( 9 ) 2022.9

VM Migration Considering Downtime for Accuracy Improvement in Multi-stage Information Processing System Reviewed

Kazutoshi Nakane, Takumi Anjiki, Jiquan Xie, Yukinobu Fukushima, Tutomu Murase

IEEE International Conference on Consumer Electronics Taiwan 2022.9

VM Migration Considering Downtime for Accuracy Improvement in Multi-stage Information Processing System Reviewed

Naoyuki Ito, Jiquan Xie, Hiroyasu Obata, Tutomu Murase

IEEE International Conference on Consumer Electronics Taiwan 2022.9

NOMA-dependent Low-Powered Retransmission in Sensing-based SPS for Cellular-V2X Mode 4 Reviewed

Hirai T., Wakamiya N., Murase T.

IEEE Vehicular Technology Conference 2022.9

Preface Reviewed

Murase T., Ishibashi Y.

WSCE 2022 - 2022 5th World Symposium on Communication Engineering 2022.9

Performance Improvement by Controlling VM Migration between Edge Nodes in a Multi-Stage Information Processing System Reviewed

Anjiki T., Nakane K., Murase T.

WSCE 2022 - 2022 5th World Symposium on Communication Engineering ( 53 - 58 ) 2022.9

NOMA-dependent Low-Powered Retransmission in Sensing-based SPS for Cellular-V2X Mode 4 Reviewed

Hirai T., Wakamiya N., Murase T.

IEEE Vehicular Technology Conference 2022.9

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Papers - MURASE Tutomu