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Paper Abstract and Keywords
Presentation 2022-10-27 16:00
Toward Improved Energy Fairness for CSMA-based LoRaWAN
Chenglong Shao, Osamu Muta (Kyushu Univ.) RCS2022-139
Abstract (in Japanese) (See Japanese page) 
(in English) This paper proposes a heterogeneous carrier-sense multiple access (CSMA) protocol named LoHEC as the first research attempt to improve energy fairness when applying CSMA to LoRaWAN. LoHEC is enabled by Channel Activity Detection (CAD), a recently introduced carrier-sensing technique to detect LoRaWAN signals even below the noise floor. The design of LoHEC is inspired by the fact that existing CAD-based CSMA proposals are in a homogeneous manner by having LoRaWAN end devices perform identical CAD regardless of the differences of their used network parameter - spreading factor (SF). This can lead to energy consumption unbalance among end devices since the consumed energy during CAD is significantly affected by SF. By considering the heterogeneity of LoRaWAN in terms of SF, LoHEC requires end devices to perform different numbers of CAD operations with different CAD intervals during channel access. Particularly, the number of needed CADs and CAD interval are determined based on the CAD energy consumption under different SFs. We conduct extensive experiments regarding LoHEC with a practical LoRaWAN testbed including 30 commercial off-the-shelf end devices. Experimental results show that in comparison with the existing solutions, LoHEC can achieve 0.6-0.8x improvement of the energy fairness on average.
Keyword (in Japanese) (See Japanese page) 
(in English) LoRaWAN / Medium access control / Carrier-sense multiple access / Channel activitiy detection / Energy fairness / / /  
Reference Info. IEICE Tech. Rep., vol. 122, no. 235, RCS2022-139, pp. 47-52, Oct. 2022.
Paper # RCS2022-139 
Date of Issue 2022-10-20 (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 RCS2022-139

Conference Information
Committee RCS  
Conference Date 2022-10-27 - 2022-10-28 
Place (in Japanese) (See Japanese page) 
Place (in English) Ehime University, and online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Wireless Communication Schemes, Wireless Communication Systems, Wireless Standards, Future Wireless Systems, etc. 
Paper Information
Registration To RCS 
Conference Code 2022-10-RCS 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Toward Improved Energy Fairness for CSMA-based LoRaWAN 
Sub Title (in English)  
Keyword(1) LoRaWAN  
Keyword(2) Medium access control  
Keyword(3) Carrier-sense multiple access  
Keyword(4) Channel activitiy detection  
Keyword(5) Energy fairness  
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1st Author's Name Chenglong Shao  
1st Author's Affiliation Kyushu University (Kyushu Univ.)
2nd Author's Name Osamu Muta  
2nd Author's Affiliation Kyushu University (Kyushu Univ.)
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Speaker Author-1 
Date Time 2022-10-27 16:00:00 
Presentation Time 25 minutes 
Registration for RCS 
Paper # RCS2022-139 
Volume (vol) vol.122 
Number (no) no.235 
Page pp.47-52 
#Pages 6 
Date of Issue 2022-10-20 (RCS) 

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