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Paper Abstract and Keywords
Presentation 2021-06-23 13:40
Investigation of NOMA-based High-Efficient and Low-Latency HARQ Method for URLLC
Ryota Kobayashi (Tokyo Univ. of Science), Yasuaki Yuda (Panasonic), Kenichi Higuchi (Tokyo Univ. of Science) RCS2021-40
Abstract (in Japanese) (See Japanese page) 
(in English) Hybrid automatic repeat request (HARQ) is an essential technology to efficiently reduce the error rate. However, for ultra-reliable low latency communications (URLLC) in the 5th generation mobile communication systems and beyond, it is necessary to minimize the increase in latency during the initial transmission and retransmission in HARQ. In this paper, we propose a non-orthogonal multiple access (NOMA)-based high-efficient and low-latency HARQ method for URLLC while minimizing the performance loss for the coexisting service (use case) such as enhanced mobile broadband (eMBB). In the proposed method, delay-sensitive URLLC packets are preferentially multiplexed with best-effort eMBB packets in the same channel by using superposition coding to reduce the transmission latency of the URLLC packet while alleviating the throughput loss in eMBB. This is achieved by the weighted channel-aware scheduler. The inter-packet interference multiplexed in the same channel is removed by the successive interference canceller (SIC) at the receiver. Furthermore, the transmission rate and resource allocation for the first transmission and retransmission are controlled in an appropriate manner for each service in order to deal with reception errors caused by error in transmission rate control due to time varying channel. We show that the proposed method can significantly improve the overall performance of the system that provides simultaneous services of eMBB and URLLC.
Keyword (in Japanese) (See Japanese page) 
(in English) Non-orthogonal multiple access / Hybrid ARQ / transmission rate control / URLLC / eMBB / / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 72, RCS2021-40, pp. 68-74, June 2021.
Paper # RCS2021-40 
Date of Issue 2021-06-16 (RCS) 
ISSN Online edition: ISSN 2432-6380
Copyright
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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 RCS2021-40

Conference Information
Committee RCS  
Conference Date 2021-06-23 - 2021-06-25 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) First Presentation in IEICE Technical Committee, Resource Control, Scheduling, Wireless Communications, etc. 
Paper Information
Registration To RCS 
Conference Code 2021-06-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Investigation of NOMA-based High-Efficient and Low-Latency HARQ Method for URLLC 
Sub Title (in English)  
Keyword(1) Non-orthogonal multiple access  
Keyword(2) Hybrid ARQ  
Keyword(3) transmission rate control  
Keyword(4) URLLC  
Keyword(5) eMBB  
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1st Author's Name Ryota Kobayashi  
1st Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
2nd Author's Name Yasuaki Yuda  
2nd Author's Affiliation Panasonic Corporation (Panasonic)
3rd Author's Name Kenichi Higuchi  
3rd Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
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Speaker Author-1 
Date Time 2021-06-23 13:40:00 
Presentation Time 10 minutes 
Registration for RCS 
Paper # RCS2021-40 
Volume (vol) vol.121 
Number (no) no.72 
Page pp.68-74 
#Pages
Date of Issue 2021-06-16 (RCS) 


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