| Paper Abstract and Keywords |
| Presentation |
2024-08-29 11:00
[Poster Presentation]
Implementation and Evaluation of a Collision Avoidance Method for LoRa Devices Based on the Opposite Phase Synchronization Phenomenon of Nonlinear Oscillators
Dai Kojima, Takuma Osada, Maki Arai, Mikio Hasegawa (Tokyo University of Science) |
| Abstract |
(in Japanese) |
(See Japanese page) |
| (in English) |
In recent years, Low Power Wide Area-networks (LPWA) that use the sub-GHz band, such as LoRa, have become widely used due to the spread of the Internet of Things (IoT). However, as the number of LPWAs increases, the sub-GHz band becomes congested and packet collisions become a problem. In their research, Osada et al. proposed a packet collision avoidance method based on the reciprocal phase synchronization phenomenon of nonlinear oscillators and demonstrated autonomous asynchronization without the need for centralized control for many devices implemented in WiSUN. In this paper, we apply this autonomous decentralized collision avoidance method to LoRa and evaluate its performance by implementing it in a real device. In the experiment, we prepared terminals controlled by an Arduino Pro Mini microcontroller with a commercially available LoRa module called ES920LR, transmitted from each terminal, and measured the time when the packets arrived. The method of implementing this technique was to monitor the transmission time of the terminal and the communication time of the other terminals before and after the transmission time, and to determine the next transmission time based on the time difference. Experimental results showed that this method can effectively desynchronize the timing of packet transmission between LoRa devices and autonomously reduce collisions when multiple devices are connected, resulting in a reduced collision rate compared to a method that transmits at regular intervals without special implementation. |
| Keyword |
(in Japanese) |
(See Japanese page) |
| (in English) |
IoT / LoRa / TDMA / nonlinear oscillator / collision avoidance / autonomous decentralized control / / |
| Reference Info. |
IEICE Tech. Rep. |
| Paper # |
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| Download PDF |
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| Conference Information |
| Committee |
CQ |
| Conference Date |
2024-08-28 - 2024-08-30 |
| Place (in Japanese) |
(See Japanese page) |
| Place (in English) |
Tenjin-Misaki Sports Park |
| Topics (in Japanese) |
(See Japanese page) |
| Topics (in English) |
Communication Quality Workshop for Students |
| Paper Information |
| Registration To |
CQ |
| Conference Code |
2024-08-CQ |
| Language |
Japanese |
| Title (in Japanese) |
(See Japanese page) |
| Sub Title (in Japanese) |
(See Japanese page) |
| Title (in English) |
Implementation and Evaluation of a Collision Avoidance Method for LoRa Devices Based on the Opposite Phase Synchronization Phenomenon of Nonlinear Oscillators |
| Sub Title (in English) |
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| Keyword(1) |
IoT |
| Keyword(2) |
LoRa |
| Keyword(3) |
TDMA |
| Keyword(4) |
nonlinear oscillator |
| Keyword(5) |
collision avoidance |
| Keyword(6) |
autonomous decentralized control |
| Keyword(7) |
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| Keyword(8) |
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| 1st Author's Name |
Dai Kojima |
| 1st Author's Affiliation |
Tokyo University of Science (Tokyo University of Science) |
| 2nd Author's Name |
Takuma Osada |
| 2nd Author's Affiliation |
Tokyo University of Science (Tokyo University of Science) |
| 3rd Author's Name |
Maki Arai |
| 3rd Author's Affiliation |
Tokyo University of Science (Tokyo University of Science) |
| 4th Author's Name |
Mikio Hasegawa |
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Tokyo University of Science (Tokyo University of Science) |
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| Speaker |
Author-1 |
| Date Time |
2024-08-29 11:00:00 |
| Presentation Time |
60 minutes |
| Registration for |
CQ |
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| Volume (vol) |
vol. |
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