| 研究課題/領域番号 |
21F21074
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| 研究種目 |
特別研究員奨励費
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| 配分区分 | 補助金 |
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| 応募区分 | 外国 |
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| 審査区分 |
小区分60060:情報ネットワーク関連
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| 研究機関 | 九州大学 |
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研究代表者 |
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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| 研究分担者 |
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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| 研究期間 (年度) |
2021-04-28 – 2023-03-31
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| 研究課題ステータス |
完了 (2022年度)
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| 配分額 *注記 |
2,300千円 (直接経費: 2,300千円)
2022年度: 1,100千円 (直接経費: 1,100千円)
2021年度: 1,200千円 (直接経費: 1,200千円)
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| キーワード | Internet of Things / LoRaWAN / Collision resolution / Channel access / Energy fairness / Physical layer / Close physical contact / Wireless power transfer / Mobile charging |
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| 研究開始時の研究の概要 |
Current unlicensed LPWANs (Low-Power Wide-Area Networks) fail to achieve the ubiquitous connectivity required by many Internet-of-Things applications and thus cannot show their full potential to satisfy the needs of this intelligent society. Therefore, to build multifunctional unlicensed LPWANs with improved connectivity between LPWAN gateways and end devices, we develop a systematic approach mainly including resilient signal reception, harmonious device transmissions, and adaptive resource allocation. A practical system study will be conducted to show the superiority of our approach.
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| 研究実績の概要 |
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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| 現在までの達成度 (段落) |
令和4年度が最終年度であるため、記入しない。
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| 今後の研究の推進方策 |
令和4年度が最終年度であるため、記入しない。
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