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Paper Abstract and Keywords
Presentation 2021-07-16 11:20
Improving Broadcast Ratio For Information Sharing Among Mobile Wireless Terminals Under Environment With Congestions
Huan-Bang Li, Takeshi Matsumura (NICT) RCC2021-37
Abstract (in Japanese) (See Japanese page) 
(in English) Device-to-Device (D2D) communications discussed in this paper refer to a particular category of D2D, in which wireless terminals autonomously and directly communicate each other without central control. Peer Aware Communications (PAC) specified in IEEE Std 802.15.8 as well as LTE-V2X PC5 Mode-4 included in 3GPP Release 16 are good examples of such category of D2D. The authors have been conducting research, development and field examination on information sharing systems based on such D2D communications. We have developed location sharing systems separately for the purposes of assisting safe flying of drones and safe sailing of ships, etc. In the developed systems, each wireless terminal is equipped either on a drone or on a ship and broadcasts own location information periodically to neighbor wireless terminals and in the meanwhile receives broadcasted information from other wireless terminals. Generally, it is desired to let wireless terminals share location information with more and more neighbor wireless terminals as possible. However, when the number of neighbor terminals is beyond the capacity of the radio channel used for broadcasting, congestion occurs and delay happens in sending broadcast. Consequently, wireless terminals cannot broadcast location information within anticipated time. It should be noted that not only increase of sensing range but also increase of wireless terminal density may cause congestion. In this paper, we propose a method of adaptively adjusting the carrier sensing range individually at each wireless terminal in accordance to channel congestion condition. Computer simulation is used to examine our proposal and it is shown that both broadcast ratio and discovery ratio are effectively improved.
Keyword (in Japanese) (See Japanese page) 
(in English) Device-to-device (D2D) / Carrier sensing / Broadcast / Information sharing / Channel congestion / / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 101, RCC2021-37, pp. 65-70, July 2021.
Paper # RCC2021-37 
Date of Issue 2021-07-07 (RCC) 
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 RCC2021-37

Conference Information
Committee RCS SR NS SeMI RCC  
Conference Date 2021-07-14 - 2021-07-16 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Communication and Network Technology of the AI Age, M2M (Machine-to-Machine)，D2D (Device-to-Device)，IoT（Internet of Things）, etc 
Paper Information
Registration To RCC 
Conference Code 2021-07-RCS-SR-NS-SeMI-RCC 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Improving Broadcast Ratio For Information Sharing Among Mobile Wireless Terminals Under Environment With Congestions 
Sub Title (in English)  
Keyword(1) Device-to-device (D2D)  
Keyword(2) Carrier sensing  
Keyword(3) Broadcast  
Keyword(4) Information sharing  
Keyword(5) Channel congestion  
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Keyword(7)  
Keyword(8)  
1st Author's Name Huan-Bang Li  
1st Author's Affiliation National Institute of Information and Communications Technology (NICT)
2nd Author's Name Takeshi Matsumura  
2nd Author's Affiliation National Institute of Information and Communications Technology (NICT)
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Speaker Author-1 
Date Time 2021-07-16 11:20:00 
Presentation Time 25 minutes 
Registration for RCC 
Paper # RCC2021-37 
Volume (vol) vol.121 
Number (no) no.101 
Page pp.65-70 
#Pages 6 
Date of Issue 2021-07-07 (RCC) 

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