Details of a Researcher - UTSUMI Tomihiro

UTSUMI Tomihiro

写真a

Affiliation

Graduate School of Engineering Science Department of Mathematical Science and Electrical-Electronic-Computer Engineering Human-Centered Computing Course

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Research Interests 【 display / non-display 】

Wireless Sensor Networks
Internet of Things
Remote Measurement

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Graduating School 【 display / non-display 】

1993.04

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1997.03

Akita University Faculty of Mining Graduated

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Graduate School 【 display / non-display 】

　

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2014.03

Akita University Graduate School of Engineering and Resource Science Doctor's Course Accomplished credits for doctoral program

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Campus Career 【 display / non-display 】

2016.04

-

Now

Akita University Graduate School of Engineering Science Department of Mathematical Science and Electrical-Electronic-Computer Engineering Human-Centered Computing Course Assistant Professor
2010.04

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2016.03

Akita University Graduate School of Engineering and Resource Science Department of Computer Science and Engineering Assistant Professor

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Academic Society Affiliations 【 display / non-display 】

2003.05

-

Now

Japan

IPSJ (Information Processing Society of Japan)
1993.03

-

Now

Japan

IEICE (The Institute of Electronics, Information and Communication Engineers)

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Research Areas 【 display / non-display 】

Informatics / Computer system
Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Communication and network engineering
Informatics / Information network / Sensor Networks, IoT

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Research Achievements 【 display / non-display 】

◆Original paper【 display / non-display 】

MUS3E: A Mobility Ubiquitous Sensor Edge Environment for the Elderly

Tomihiro Utsumi, Masatoshi Arikawa, Masashi Hashimoto

Electronics (Switzerland) ( Electronics (Switzerland) ) 12 ( 14 ) 3003 - 3003 2023.07 [Refereed]

Research paper (journal) Domestic Co-author

With the ageing of society, the number of households with older individuals or couples living alone is increasing. An “ageing-in-place” approach allows older adults to continue to live at home and receive help only when needed. However, this approach is insufficient for emergencies, such as falls, as well as for individuals with gradually deteriorating health conditions, such as frailty. Unexpected accidents significantly reduce the quality of life (QoL) of older adults. This paper proposes a new framework, the mobility ubiquitous sensor edge environment (MUS3E), to digitally transform ordinary houses to detect the movement of older individuals throughout their home environment and to notify family members and care providers of residents’ health status and safety information. The framework can be easily and inexpensively installed in any home, transforming an ordinary house into a smart home with an automated function for monitoring older residents. It uses ambient sensors such as passive infrared ray sensors to automatically measure health conditions by measuring factors such as walking speed. Residents need not interact with or control the system and can go about their daily lives. Since the sensors used in this system are mass-produced consumer products, they are inexpensive and easily replaceable, as there are many alternatives. In this study, we were able to demonstrate the practically and feasibility of this framework using a prototype that uses open architecture Internet of Things (IoT) software (Debian GNU/Linux 11, Arduino 1.8.19, ESP8266 2.7.4, ESP32 1.0.6, PubSubClient 2.8.0, ESPPerfectTime 0.3.0, mosquitto 2.0.11) components to digitally transform the living environment of older individuals.

DOI

Traffic Engineering by Offloading Using Enhanced Links and Determnation of Most Effective Links Suitable for Upgradable TE

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 2018.08 [Refereed]

Research paper (journal) Domestic Co-author

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.

DOI CiNii Research

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 2018.07 [Refereed]

Research paper (journal) Domestic Co-author

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.

DOI CiNii Research

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 2017.03 [Refereed]

Research paper (journal) Domestic Co-author

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.

DOI CiNii Research

A Feasibility Study on the Buffer-Less Routing Networks Using Deflection Routing Control

Tomihiro Utsumi, Shin Konno, Yusuke Kanno, Ken-ichi Yukimatsu, Mahito Kobayashi, Masashi Hashimoto

The IEICE Transactions on Communications(Japanese Edition) ( The Institute of Electronics, Information and Communication Engineers ) J92-B ( 11 ) 1741 - 1749 2009.11 [Refereed]

Research paper (journal) Domestic Co-author

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◆International conference proceedings【 display / non-display 】

Adaptable Data-Driven Geofences for Notifying Points of Interest Using Tourists' GPS Trajectories

Iori Sasaki, Masatoshi Arikawa, Min Lu, Ryo Sato, Tomihiro Utsumi

Proceedings of the 7th ACM SIGSPATIAL Workshop on Location-based Recommendations, Geosocial Networks and Geoadvertising ( ACM ) 2023.11 [Refereed]