| Presentation | 2023-03-03 Proposal and Empirical Evaluation of Relay Communication Methods for LPWA Real-time Sensing Kazuya Hirotsu, Katsunori Mizuno, Shigeru Tabeta, Tetsuo Shimada, Yasufumi Fujimoto, Akihiro Nakao, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Real-time sensing of the natural environment often requires power-saving and long-distance communication, and LPWA communication methods are becoming popular, however, relay nodes in systems with relays need to be constantly powered. This research proposes two methods to reduce power consumption by enabling relay nodes to sleep. Sleep of relay nodes requires time synchronization between nodes and control of communication time, which is achieved by the relay node querying the end node for data in the first proposed method and by broadcasting time information and giving time slots to each end node in the second method. A comparative evaluation of the methods is carried out using simulations, and the implementation of the methods by LoRa Private and the improvement in power efficiency is shown through a demonstration in Izunuma, Miyagi Prefecture. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | LPWA / LoRa / Relay / Real-time sensing / MAC |
| Paper # | NS2022-251 |
| Date of Issue | 2023-02-23 (NS) |
| Conference Information | |
| Committee | IN / NS |
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| Conference Date | 2023/3/2(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Okinawa Convention Centre + Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | General |
| Chair | Kunio Hato(Internet Multifeed) / Tetsuya Oishi(NTT) |
| Vice Chair | Tsutomu Murase(Nagoya Univ.) / Takumi Miyoshi(Shibaura Insti of Tech.) |
| Secretary | Tsutomu Murase(KDDI Research) / Takumi Miyoshi(Nagaoka Univ. of Tech.) |
| Assistant | / Kotaro Mihara(NTT) |
| Paper Information | |
| Registration To | Technical Committee on Information Networks / Technical Committee on Network Systems |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Proposal and Empirical Evaluation of Relay Communication Methods for LPWA Real-time Sensing |
| Sub Title (in English) | |
| Keyword(1) | LPWA |
| Keyword(2) | LoRa |
| Keyword(3) | Relay |
| Keyword(4) | Real-time sensing |
| Keyword(5) | MAC |
| 1st Author's Name | Kazuya Hirotsu |
| 1st Author's Affiliation | The University of Tokyo(UTokyo) |
| 2nd Author's Name | Katsunori Mizuno |
| 2nd Author's Affiliation | The University of Tokyo(UTokyo) |
| 3rd Author's Name | Shigeru Tabeta |
| 3rd Author's Affiliation | The University of Tokyo(UTokyo) |
| 4th Author's Name | Tetsuo Shimada |
| 4th Author's Affiliation | The Miyagi Prefectural Izunuma-Uchinuma Environmental Foundation(Izunuma Foundation) |
| 5th Author's Name | Yasufumi Fujimoto |
| 5th Author's Affiliation | The Miyagi Prefectural Izunuma-Uchinuma Environmental Foundation(Izunuma Foundation) |
| 6th Author's Name | Akihiro Nakao |
| 6th Author's Affiliation | The University of Tokyo(UTokyo) |
| Date | 2023-03-03 |
| Paper # | NS2022-251 |
| Volume (vol) | vol.122 |
| Number (no) | NS-406 |
| Page | pp.pp.481-486(NS), |
| #Pages | 6 |
| Date of Issue | 2023-02-23 (NS) |