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Affiliation |
Graduate School of Engineering Science Department of Mathematical Science and Electrical-Electronic-Computer Engineering Human-Centered Computing Course |
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Date of Birth |
1960 |
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Mail Address |
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HASHIMOTO Masashi
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Research Interests 【 display / non-display 】
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Photonic Network
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Traffic Engineering
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Network Optimization
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IoT Network System
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Information Network
Graduating School 【 display / non-display 】
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-1982.03
Waseda University Graduated
Graduate School 【 display / non-display 】
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1982.04-1984.03
Kyoto University Graduate School,Division of Engineering Master's Course Completed
Campus Career 【 display / non-display 】
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2016.04-Now
Akita University Graduate School of Engineering Science Department of Mathematical Science and Electrical-Electronic-Computer Engineering Human-Centered Computing Course Associate Professor
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2010.04-2016.03
Akita University Graduate School of Engineering and Resource Science Department of Computer Science and Engineering Associate Professor
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2008.04-2010.03
Akita University Associate Professor
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2005.04-2008.03
Akita University Associate Professor
Research Areas 【 display / non-display 】
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Informatics / Information network
Research Achievements 【 display / non-display 】
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Characterization of the Imaged R/S Pox Diagram for Low-rate DoS Attack
A. Takahashi, R. Igarashi, K. Sasai, H. Ueda, Y. Iwaya, T. Kinoshita, M. Hashimoto
Int. J. Soc. Mater. Eng. Resour. 23 ( 2 ) 152 - 157 2018.09 [Refereed]
Research paper (journal) Domestic Co-author
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Traffic Engineering by Offloading Using Enhanced Links and Determination of Most Effective Links Suitable for Upgradable TE
Masashi Hashimoto, Shinsuke Koyama, Takahiro Funaki, Tomihiro Utsumi
IEEJ Transactions on Electronics, Information and Systems 138 ( 8 ) 1020 - 1028 2018.08 [Refereed]
Research paper (journal) Domestic Co-author
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Metric-base Traffic Engineering with Limited Area for TE Considering QoS Characteristics
Masashi Hashimoto, Shinsuke Koyama, Takahiro Funaki, Tomihiro Utsumi
IEEJ Transactions on Electronics, Information and Systems 138 ( 7 ) 912 - 920 2018.07 [Refereed]
Research paper (journal) Domestic Co-author
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Simple Method with Link Cost Setting for Simulating Traffic Congestion in Disaster-affected Networks
Masashi Hashimoto, Shinsuke Koyama, Tomihiro Utsumi, Toshikazu Sakano
IEEJ Transactions on Electronics, Information and Systems 137 ( 3 ) 445 - 451 2017.03 [Refereed]
Research paper (journal) Domestic Co-author
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Partial Traffic Engineering for Guaranteeing Network Quality
Masashi Hashimoto, Ken-ichi Yukimatsu, Takashi Miyamura, Kohei Shiomoto
APSITT2008 48 - 52 2008.01
Research paper (journal)
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A Development of an Early Detection System of Pre-frailty in Senior Citizens Living Inside
Tomihiro Utsumi, Masashi Hashimoto
2023 17th International Conference on Ubiquitous Information Management and Communication (IMCOM) ( IEEE ) 2023.01 [Refereed]
Research paper (international conference proceedings) Domestic Co-author
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Characterization of the Imaged R/S Pox Diagram for Low-rate DoS Attack
Akinori TAKAHASHI, Ryuji IGARASHI, Kazuto SASAI, Hiroshi UEDA, Yukio IWAYA, Tetsuo KINOSHITA, Masashi HASHIMOTO
The Proceedings of ICMR 2017 AKITA, Eighth International Conference on Materials Engineering for Resources 50 - 50 2017.10 [Refereed]
Research paper (international conference proceedings) Domestic Co-author
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Multi-Topology-based simple simulation for large area damaged network （共著）
Shinsuke Koyama, Masashi Hashimoto, Toshikazu Sakano
IEEE R10-HTC2013 67 - 67 2013.08 [Refereed]
Research paper (international conference proceedings) Domestic Co-author
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A Walking Speed Measurement System Using PIR Sensors for Early Detection of Pre-Frailty
Utsumi T., M. Hashimoto
BMEiCON 2021 - 13th Biomedical Engineering International Conference ( BMEiCON 2021 - 13th Biomedical Engineering International Conference ) 2021.11 [Refereed]
Domestic Co-author
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Metric-base Traffic Engineering with Limited Area for TE Considering QoS Characteristics
Hashimoto Masashi, Koyama Shinsuke, Funaki Takahiro, Utsumi Tomihiro
IEEJ Transactions on Electronics, Information and Systems ( The Institute of Electrical Engineers of Japan ) 138 ( 7 ) 912 - 920 2018
<p>We propose traffic engineering which exists together with metric base QoS routing. In shortest paths routing, particular several links tends to be congested. TE in our proposal is adopted only to the specified area, TE area, consisting of congested links. So route of traffic which does not transmit through TE area have no change. We realize this TE routing with metric base, which means all routes are determined as shortest paths according to link costs. We formulate this as LP network problem (primary problem) and dual problem for derivation of link costs. Simulation results confirm that proposed method achieves metric base QoS routing without congestion.</p>
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Hashimoto Masashi, Kinno Mio, Shinozaki Syouta, Utsumi Tomihiro
IEEJ Transactions on Electronics, Information and Systems ( The Institute of Electrical Engineers of Japan ) 138 ( 8 ) 1020 - 1028 2018
<p>Offloading which means the enhancement of link capacity is performed to accommodate ever-increasing network traffic. We study determination of enhancement links effective even if there are many links showing the high same link utilization ratio. And also, it is desirable that the link enhancement is performed on a stepwise link pair which has the greatest effect of improving congestion and achieves an effect each time it is increased by one. In this paper, first, we propose a determination method of offloading link section and its effectiveness is verified. Second, we propose and discuss a stepwise link decision method that maintains the effective improvement of congestion reduction.</p>
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Simple Method with Link Cost Setting for Simulating Traffic Congestion in Disaster-affected Networks
Hashimoto Masashi, Koyama Shinsuke, Utsumi Tomihiro, Sakano Toshikazu
IEEJ Transactions on Electronics, Information and Systems ( The Institute of Electrical Engineers of Japan ) 137 ( 3 ) 445 - 451 2017
<p>We propose a method that addresses the shortest path problem in estimating network traffic distribution when a network infrastructure is damaged at the time of disaster. It uses link costs that are different from those used prior to the disaster. There are three assumptions: (1) traffic whose source and destination points lie outside the disaster-affected area do not use damaged networks, (2) Traffic that traverses the border of the disaster-affected area uses at most one link, (3) traffic that is related to the disaster-affected area does not exit disaster area. We use different link costs from those used prior to the disaster time, and the shortest paths under the link costs that satisfy conditions (1), (2), and (3) above. In this paper, we introduce a method for setting link costs and adapt it to yield a real networking model. We set traffic patterns and a disaster-affected area and carry out simulations. The simulation results confirm that it is possible to simulate the changes in volume and the distribution of traffic owing on each link.</p>
◆Original paper【 display / non-display 】
◆International conference proceedings【 display / non-display 】
◆Other【 display / non-display 】
Grant-in-Aid for Scientific Research 【 display / non-display 】
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Grant-in-Aid for Scientific Research(C)
Project Year： 2009.04 - 2012.03
Presentations 【 display / non-display 】
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Availability Analyses for Photonic Network by Minimal Blocking Set using ZDD based Graphillion
Masashi Hashimoto, Tomihiro Utsumi, Takeru Inoue
IEICE 2016.09 - 2016.09
Academic Activity 【 display / non-display 】
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2016.07-Now
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2015.10-2016.09
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2015.04-Now