| Presentation | 2022-03-11 Dynamic Scheduling Method Using Transmission Delay Manipulation via ACK for LoRa Wireless Network Riki Bando, Akihiro Nakao, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | LoRa, one type of LPWA, uses ALOHA for the MAC layer protocol, which causes an increase in packet collisions due to overlapping of intermittent communication as the number of sensors increases. We have proposed a method of dynamically smoothing the traffic to shift transmission timing of each sensor by controlling the transmission delay via ACK responses, but this method has been evaluated only by simulation. In this paper, we evaluate the effectiveness of the proposed method with actual devices. The evaluation experiments show that the proposed method can improve the packet delivery rate by up to 92 % when each sensor is activated simultaneously, and by up to 35 % when each sensor is activated randomly, and can increase the number of devices in the bandwidth. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | IoT / LPWA / LoRa / Periodic Traffic / ALOHA / Transmission Delay Manipulation |
| Paper # | NS2021-150 |
| Date of Issue | 2022-03-03 (NS) |
| Conference Information | |
| Committee | NS / IN |
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| Conference Date | 2022/3/10(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | General |
| Chair | Akihiro Nakao(Univ. of Tokyo) / Kenji Ishida(Hiroshima City Univ.) |
| Vice Chair | Tetsuya Oishi(NTT) / Kunio Hato(Internet Multifeed) |
| Secretary | Tetsuya Oishi(NTT) / Kunio Hato(Chuo Univ.) |
| Assistant | Kotaro Mihara(NTT) |
| Paper Information | |
| Registration To | Technical Committee on Network Systems / Technical Committee on Information Networks |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Dynamic Scheduling Method Using Transmission Delay Manipulation via ACK for LoRa Wireless Network |
| Sub Title (in English) | |
| Keyword(1) | IoT |
| Keyword(2) | LPWA |
| Keyword(3) | LoRa |
| Keyword(4) | Periodic Traffic |
| Keyword(5) | ALOHA |
| Keyword(6) | Transmission Delay Manipulation |
| 1st Author's Name | Riki Bando |
| 1st Author's Affiliation | The University of Tokyo(UTokyo) |
| 2nd Author's Name | Akihiro Nakao |
| 2nd Author's Affiliation | The University of Tokyo(UTokyo) |
| Date | 2022-03-11 |
| Paper # | NS2021-150 |
| Volume (vol) | vol.121 |
| Number (no) | NS-433 |
| Page | pp.pp.164-170(NS), |
| #Pages | 7 |
| Date of Issue | 2022-03-03 (NS) |