| Presentation | 2018-06-22 Improving the Capacity of Multi-hop LoRa Network using Spreading-factor-based Network Clustering Guibing Zhu, Chun-Hao Liao, Theerat Sakdejayont, Yoshiaki Narusue, Hiroyuki Morikawa, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | LoRa is a low-power long-range IoT standard using the chirp spread spectrum (CSS) technique, and wehave been strived to further extend its coverage range by constructing a multi-hop relay network. In LoRa, the spreading factor (SF) is an important parameter which not only provides great flexibility between data rate and sensitivity, but also presents a new dimension for multiple access. To utilize such multiple-access dimension in our multi-hop LoRa network, we present a tree-based SF clustering algorithm (TSCA) that groups the nodes into several sub-trees rooted at a sink node. Each sub-tree transmits packets using a different SF. In contrast to the SF allocation on a single-hop network, our algorithm focuses on 1) ensuring the connectivity of all sub-trees, 2) offloading the traffic according to a number of nodes, data rates and network topologies of each sub-tree, 3) shortening the air time of each subnet by reducing the hop count. The simulation results show that our approach can significantly increase the network performance. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | LoRaMesh networkSF allocationClusteringTSCAAir timeParallel transmissionLPWA |
| Paper # | RCS2018-75 |
| Date of Issue | 2018-06-13 (RCS) |
| Conference Information | |
| Committee | RCS |
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| Conference Date | 2018/6/20(3days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Nagasaki University |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | First Presentation in IEICE Technical Committee, Railroad Communications, Inter-Vehicle Communications, Road to Vehicle Communications, Resource Control, Scheduling, Wireless Communication Systems, etc. |
| Chair | Tomoaki Otsuki(Keio Univ.) |
| Vice Chair | Eisuke Fukuda(Fujitsu Labs.) / Satoshi Suyama(NTT DoCoMo) / Fumiaki Maehara(Waseda Univ.) |
| Secretary | Eisuke Fukuda(Hokkaido Univ.) / Satoshi Suyama(NTT) / Fumiaki Maehara |
| Assistant | Kazushi Muraoka(NTT DOCOMO) / Shinsuke Ibi(Osaka Univ.) / Hiroshi Nishimoto(Mitsubishi Electric) / Koichi Adachi(Univ. of Electro-Comm.) / Osamu Nakamura(Sharp) |
| Paper Information | |
| Registration To | Technical Committee on Radio Communication Systems |
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| Language | ENG-JTITLE |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Improving the Capacity of Multi-hop LoRa Network using Spreading-factor-based Network Clustering |
| Sub Title (in English) | |
| Keyword(1) | LoRaMesh networkSF allocationClusteringTSCAAir timeParallel transmissionLPWA |
| 1st Author's Name | Guibing Zhu |
| 1st Author's Affiliation | The University of Tokyo(UTokyo) |
| 2nd Author's Name | Chun-Hao Liao |
| 2nd Author's Affiliation | The University of Tokyo(UTokyo) |
| 3rd Author's Name | Theerat Sakdejayont |
| 3rd Author's Affiliation | The University of Tokyo(UTokyo) |
| 4th Author's Name | Yoshiaki Narusue |
| 4th Author's Affiliation | The University of Tokyo(UTokyo) |
| 5th Author's Name | Hiroyuki Morikawa |
| 5th Author's Affiliation | The University of Tokyo(UTokyo) |
| Date | 2018-06-22 |
| Paper # | RCS2018-75 |
| Volume (vol) | vol.118 |
| Number (no) | RCS-101 |
| Page | pp.pp.237-242(RCS), |
| #Pages | 6 |
| Date of Issue | 2018-06-13 (RCS) |