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Paper Abstract and Keywords
Presentation 2021-06-23 10:10
A Study on Throughput Improvement of Adaptive Modulation and Coding based HARQ in 5G URLLC
Akira Hasegawa, Eiji Okamoto (NIT), Manabu Mikami, Hitoshi Yoshino (SoftBank corp.) RCS2021-33
Abstract (in Japanese) (See Japanese page) 
(in English) Ultra-reliable and low latency communications (URLLC) is one of the main scenarios for the 5th generation mobile communications system (5G), whose use cases are time-sensitive applications such as autonomous driving. In conventional URLLC transmission, the modulation index and coding rate are usually limited to lower values to suppress the transmission error rate, and subsequently, the throughput performance is also limited. Therefore, in this paper, we propose a new URLLC transmission method to achieve both high reliability and low latency in wireless transmission by using adaptive modulation and coding (AMC)-based open-loop hybrid automatic repeat request (HARQ), which is a balanced combination of AMC and HARQ. The proposed method uses thresholds for AMC switching based on mutual information. By using the appropriate thresholds, we show that the proposed AMC-HARQ satisfies the requirements of URLLC and improves the throughput performance under the limited frequency band by numerical simulations.
Keyword (in Japanese) (See Japanese page) 
(in English) 5G / URLLC / adaptive modulation and coding / hybrid automatic repeat request / mutual information / autonomous driving / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 72, RCS2021-33, pp. 25-30, June 2021.
Paper # RCS2021-33 
Date of Issue 2021-06-16 (RCS) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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 RCS2021-33

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) A Study on Throughput Improvement of Adaptive Modulation and Coding based HARQ in 5G URLLC 
Sub Title (in English)  
Keyword(1) 5G  
Keyword(2) URLLC  
Keyword(3) adaptive modulation and coding  
Keyword(4) hybrid automatic repeat request  
Keyword(5) mutual information  
Keyword(6) autonomous driving  
1st Author's Name Akira Hasegawa  
1st Author's Affiliation Nagoya Institute of Technology (NIT)
2nd Author's Name Eiji Okamoto  
2nd Author's Affiliation Nagoya Institute of Technology (NIT)
3rd Author's Name Manabu Mikami  
3rd Author's Affiliation SoftBank corporation (SoftBank corp.)
4th Author's Name Hitoshi Yoshino  
4th Author's Affiliation SoftBank corporation (SoftBank corp.)
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Speaker Author-1 
Date Time 2021-06-23 10:10:00 
Presentation Time 10 minutes 
Registration for RCS 
Paper # RCS2021-33 
Volume (vol) vol.121 
Number (no) no.72 
Page pp.25-30 
Date of Issue 2021-06-16 (RCS) 

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