| Project/Area Number |
21F21074
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| Research Category |
Grant-in-Aid for JSPS Fellows
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| Allocation Type | Single-year Grants |
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| Section | 外国 |
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| Review Section |
Basic Section 60060:Information network-related
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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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| Project Status |
Completed (Fiscal Year 2022)
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| Budget Amount *help |
¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 2022: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2021: ¥1,200,000 (Direct Cost: ¥1,200,000)
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| Keywords | Internet of Things / LoRaWAN / Collision resolution / Channel access / Energy fairness / Physical layer / Close physical contact / Wireless power transfer / Mobile charging |
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| Outline of Research at the Start |
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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| 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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