| Presentation | 2022-10-27 Toward Improved Energy Fairness for CSMA-based LoRaWAN Chenglong Shao, Osamu Muta, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper proposes a heterogeneous carrier-sense multiple access (CSMA) protocol named LoHEC as the first research attempt to improve energy fairness when applying CSMA to LoRaWAN. LoHEC is enabled by Channel Activity Detection (CAD), a recently introduced carrier-sensing technique to detect LoRaWAN signals even below the noise floor. The design of LoHEC is inspired by the fact that existing CAD-based CSMA proposals are in a homogeneous manner by having LoRaWAN end devices perform identical CAD regardless of the differences of their used network parameter - spreading factor (SF). This can lead to energy consumption unbalance among end devices since the consumed energy during CAD is significantly affected by SF. By considering the heterogeneity of LoRaWAN in terms of SF, LoHEC requires end devices to perform different numbers of CAD operations with different CAD intervals during channel access. Particularly, the number of needed CADs and CAD interval are determined based on the CAD energy consumption under different SFs. We conduct extensive experiments regarding LoHEC with a practical LoRaWAN testbed including 30 commercial off-the-shelf end devices. Experimental results show that in comparison with the existing solutions, LoHEC can achieve 0.6-0.8x improvement of the energy fairness on average. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | LoRaWANMedium access controlCarrier-sense multiple accessChannel activitiy detectionEnergy fairness |
| Paper # | RCS2022-139 |
| Date of Issue | 2022-10-20 (RCS) |
| Conference Information | |
| Committee | RCS |
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| Conference Date | 2022/10/27(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Ehime University, and online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Wireless Communication Schemes, Wireless Communication Systems, Wireless Standards, Future Wireless Systems, etc. |
| Chair | Kenichi Higuchi(Tokyo Univ. of Science) |
| Vice Chair | Tomoya Tandai(Toshiba) / Fumihide Kojima(NICT) / Osamu Muta(Kyushu Univ.) |
| Secretary | Tomoya Tandai(Panasonic) / Fumihide Kojima(Univ. of Electro-Comm) / Osamu Muta(Sharp) |
| Assistant | Manabu Sakai(Mitsubishi Electric) / Masashi Iwabuchi(NTT) / Issei Kanno(KDDI Research) / Yuyuan Chang(Tokyo Inst. of Tech) / Kazuki Maruta(Tokyo Univ. of Science) |
| Paper Information | |
| Registration To | Technical Committee on Radio Communication Systems |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Toward Improved Energy Fairness for CSMA-based LoRaWAN |
| Sub Title (in English) | |
| Keyword(1) | LoRaWANMedium access controlCarrier-sense multiple accessChannel activitiy detectionEnergy fairness |
| 1st Author's Name | Chenglong Shao |
| 1st Author's Affiliation | Kyushu University(Kyushu Univ.) |
| 2nd Author's Name | Osamu Muta |
| 2nd Author's Affiliation | Kyushu University(Kyushu Univ.) |
| Date | 2022-10-27 |
| Paper # | RCS2022-139 |
| Volume (vol) | vol.122 |
| Number (no) | RCS-235 |
| Page | pp.pp.47-52(RCS), |
| #Pages | 6 |
| Date of Issue | 2022-10-20 (RCS) |