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| Presentation | 2018-06-22 14:50 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 (UTokyo)  RCS2018-75 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | LoRa is a low-power long-range IoT standard using the chirp spread spectrum (CSS) technique, and we have 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. |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | LoRa / Mesh network / SF allocation / Clustering / TSCA / Air time / Parallel transmission / LPWA | |
| Reference Info. | IEICE Tech. Rep., vol. 118, no. 101, RCS2018-75, pp. 237-242, June 2018. | |
| Paper # | RCS2018-75 | |
| Date of Issue | 2018-06-13 (RCS) | |
| ISSN | Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | RCS2018-75 |
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| Conference Information | |
| Committee | RCS |
| Conference Date | 2018-06-20 - 2018-06-22 |
| 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. |
| Paper Information | |
| Registration To | RCS |
| Conference Code | 2018-06-RCS |
| Language | English (Japanese title is available) |
| 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) | LoRa |
| Keyword(2) | Mesh network |
| Keyword(3) | SF allocation |
| Keyword(4) | Clustering |
| Keyword(5) | TSCA |
| Keyword(6) | Air time |
| Keyword(7) | Parallel transmission |
| Keyword(8) | LPWA |
| 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) |
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| Speaker | Author-1 |
| Date Time | 2018-06-22 14:50:00 |
| Presentation Time | 25 minutes |
| Registration for | RCS |
| Paper # | RCS2018-75 |
| Volume (vol) | vol.118 |
| Number (no) | no.101 |
| Page | pp.237-242 |
| #Pages | 6 |
| Date of Issue | 2018-06-13 (RCS) |
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