2022 Fiscal Year Annual Research Report
Toward Ubiquitous Connectivity via Unlicensed LPWANs
| Project/Area Number |
21F21074
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| Research Institution | Kyushu University |
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Principal Investigator |
牟田 修 九州大学, 日本エジプト科学技術連携センター, 准教授 (80336065)
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| Co-Investigator(Kenkyū-buntansha) |
SHAO CHENGLONG 九州大学, 日本エジプト科学技術連携センター, 外国人特別研究員
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| Project Period (FY) |
2021-04-28 – 2023-03-31
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| Keywords | Internet of Things / LoRaWAN / Collision resolution / Channel access / Energy fairness |
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| Outline of Annual Research Achievements |
This research aims to design LRNet, a one-size-fits-all networking engine for LoRaWAN systems, to provide ubiquitous Internet-of-Things (IoT) connectivity. Specifically, LRNet is expected to enable better device coexistence and higher link capacity. In the first year, this is achieved mainly via the design of novel algorithms for resilient signal reception. To this end, we have built an indoor LoRaWAN prototype with two USRP N210 software-defined radios as LoRaWAN gateways and twelve Dragino LoRa Shields as LoRaWAN end devices. In the second year, we have built an outdoor LoRaWAN prototype with several commodity LoRaWAN gateways and a larger number of LoRaWAN end devices. This prototype was deployed in a university campus environment. Regarding the issue of resilient signal reception, we have published a paper to present a physical-layer anti-collision solution. We have also conducted several experiments to study the medium access control (MAC)-layer issues in LoRaWAN. We have published two papers to provide a comprehensive tutorial of LoRaWAN MAC and a newly-designed MAC protocol for energy fairness improvement, respectively. Particularly, this proposed MAC protocol received the Best Paper Award at an international conference.
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| Research Progress Status |
令和4年度が最終年度であるため、記入しない。
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| Strategy for Future Research Activity |
令和4年度が最終年度であるため、記入しない。
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