| Presentation | 2018-07-13 Acquisition Method for Consistent Observation Time of Sensor Data in Wireless Sensor Networks Ayako Arao, Hiroaki Higaki, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In wireless sensor networks, each wireless sensor node records all events occurred within its observation area with their observation times. Each wireless sensor node possesses its own local clock whose drift and offset are different each other. Until now, various clock synchronization methods have been proposed by exchanging synchronization messages carrying current local clock values. However, it is difficult to realize precise clock synchronization due to unpredictable transmission delay of the synchronization messages. Hence, this paper proposes novel clocksynchronization method without synchronization message exchanges. Here, by using event observation logs of neighbor wireless sensor nodes, commonly observed events are estimated and the relative drift and offset providing the maximum number of commonly observed events are adopted to clock synchronization between the neighbor wireless sensor nodes. In addition, this paper proposes a method for clock synchronization among local clocks of all the wireless sensor nodes. Here, a local clock of one of the wireless sensor nodes is selected as the reference local clock and all the other local clocks are synchronized with it by estimation of relative drifts and offsets. To reduce the synchronization error in the estimation, an algorithm to configure a clock synchronization graph whose root is the reference local clock and whose links represent connections between wireless sensor nodes where the proposed clock synchronization method between neighbor wireless sensor nodes are applied is proposed. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Wireless Sensor Networks / Local Clocks / Synchronization / Event Observation / Spanning Tree |
| Paper # | RCC2018-55,NS2018-79,RCS2018-124,SR2018-55,ASN2018-49 |
| Date of Issue | 2018-07-04 (RCC, NS, RCS, SR, ASN) |
| Conference Information | |
| Committee | ASN / NS / RCS / SR / RCC |
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| Conference Date | 2018/7/11(3days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Hakodate Arena |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Wireless Distributed Network, Machine Learning and AI for Wireless Communications and Networks, M2M (Machine-to-Machine), D2D (Device-to-Device), IoT（Internet of Things）, etc. |
| Chair | Hiraku Okada(Nagoya Univ.) / Yoshikatsu Okazaki(NTT) / Tomoaki Otsuki(Keio Univ.) / Kenta Umebayashi(Tokyo Univ. of Agric. and Tech.) / Kazunori Hayashi(Osaka City Univ.) |
| Vice Chair | Koji Yamamoto(Kyoto Univ.) / Jin Nakazawa(Keio Univ.) / Kazuya Monden(Hitachi) / Akihiro Nakao(Univ. of Tokyo) / Eisuke Fukuda(Fujitsu Labs.) / Satoshi Suyama(NTT DoCoMo) / Fumiaki Maehara(Waseda Univ.) / Masayuki Ariyoshi(NEC) / Suguru Kameda(Tohoku Univ.) / Shunichi Azuma(Nagoya Univ.) / HUAN-BANG LI(NICT) |
| Secretary | Koji Yamamoto(NICT) / Jin Nakazawa(Sophia Univ.) / Kazuya Monden(Kanagawa Inst. of Tech.) / Akihiro Nakao(NTT) / Eisuke Fukuda(Osaka Pref Univ.) / Satoshi Suyama(Hokkaido Univ.) / Fumiaki Maehara(NTT) / Masayuki Ariyoshi(NICT) / Suguru Kameda(ATR) / Shunichi Azuma(Univ. of Electro-Comm.) / HUAN-BANG LI(Kagawa Univ.) |
| Assistant | Masafumi Hashimoto(Osaka Univ.) / Tomoyuki Ota(Hiroshima City Univ.) / Tatsuya Kikuzuki(Fujitu Lab.) / Ryo Nakano(HITACHI) / Yoshifumi Hotta(Mitsubishi Electric) / Kenichi Kashibuchi(NTT) / Kazushi Muraoka(NTT DOCOMO) / Shinsuke Ibi(Osaka Univ.) / Hiroshi Nishimoto(Mitsubishi Electric) / Koichi Adachi(Univ. of Electro-Comm.) / Osamu Nakamura(Sharp) / Gia Khanh Tran(Tokyo Inst. of Tech.) / Syusuke Narieda(Mie Univ.) / Koji Ohshima(Kozo Keikaku Engineering) / Mai Ohta(Fukuoka Univ.) / Teppei Oyama(Fujitsu Lab.) / Toshinori Kagawa(NICT) / Masateru Ogura(NAIST) |
| Paper Information | |
| Registration To | Technical Committee on Ambient intelligence and Sensor Networks / Technical Committee on Network Systems / Technical Committee on Radio Communication Systems / Technical Committee on Smart Radio / Technical Committee on Reliable Communication and Control |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Acquisition Method for Consistent Observation Time of Sensor Data in Wireless Sensor Networks |
| Sub Title (in English) | |
| Keyword(1) | Wireless Sensor Networks |
| Keyword(2) | Local Clocks |
| Keyword(3) | Synchronization |
| Keyword(4) | Event Observation |
| Keyword(5) | Spanning Tree |
| 1st Author's Name | Ayako Arao |
| 1st Author's Affiliation | Tokyo Denki University(Tokyo Denki Univ.) |
| 2nd Author's Name | Hiroaki Higaki |
| 2nd Author's Affiliation | Tokyo Denki University(Tokyo Denki Univ.) |
| Date | 2018-07-13 |
| Paper # | RCC2018-55,NS2018-79,RCS2018-124,SR2018-55,ASN2018-49 |
| Volume (vol) | vol.118 |
| Number (no) | RCC-123,NS-124,RCS-125,SR-126,ASN-127 |
| Page | pp.pp.137-142(RCC), pp.211-216(NS), pp.219-224(RCS), pp.165-170(SR), pp.153-158(ASN), |
| #Pages | 6 |
| Date of Issue | 2018-07-04 (RCC, NS, RCS, SR, ASN) |