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Paper Abstract and Keywords
Presentation 2021-09-10 09:30
Efficient RPL Tree Construction Using Passive Link Quality Estimation
Hiroto Fujita, Yasuyuki Tanaka, Kosuke Mori, Fumio Teraoka (Keio Univ.) CQ2021-50
Abstract (in Japanese) (See Japanese page) 
(in English) For IIoT (Industrial Internet of Things) networks, RPL (IPv6 Routing Protocol for Low-Power and Lossy Networks) is standardized by the IETF (Internet Engineering Task Force) as a routing protocol. In RPL, each node estimates the link quality for neighboring nodes and builds a tree structure with the sink as the root node. In existing schemes, each node sends a packet to neighboring nodes to estimate the link quality. However, this method makes the overhead of the RPL control packet larger. This paper proposes BROF (Broadcast Reception based Objective Function) that estimates the link quality by using the actual number of DIO (DODAG Information Object) receptions and the predicted number of DIO receptions. This paper evaluated BROF by comparing it with MRHOF implemented in Contiki-NG, which is an OS for IoT devices. As a result, BROF has fewer parent node switches than MRHOF and the control overhead of BROF is about 35% of that of MRHOF. Furthermore, the average delay time when sending UDP packets in BROF is smaller than that in MRHOF.
Keyword (in Japanese) (See Japanese page) 
(in English) IoT / RPL / Link Quality Estimation / / / / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 173, CQ2021-50, pp. 59-64, Sept. 2021.
Paper # CQ2021-50 
Date of Issue 2021-09-02 (CQ) 
ISSN 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 CQ2021-50

Conference Information
Committee CQ MIKA  
Conference Date 2021-09-09 - 2021-09-10 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Wireless Communications Quality, 6G, IoT, Resource Management, Wireless Transmission, Cross layer Technologies, etc. 
Paper Information
Registration To CQ 
Conference Code 2021-09-CQ-MIKA 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Efficient RPL Tree Construction Using Passive Link Quality Estimation 
Sub Title (in English)  
Keyword(1) IoT  
Keyword(2) RPL  
Keyword(3) Link Quality Estimation  
1st Author's Name Hiroto Fujita  
1st Author's Affiliation Keio University (Keio Univ.)
2nd Author's Name Yasuyuki Tanaka  
2nd Author's Affiliation Keio University (Keio Univ.)
3rd Author's Name Kosuke Mori  
3rd Author's Affiliation Keio University (Keio Univ.)
4th Author's Name Fumio Teraoka  
4th Author's Affiliation Keio University (Keio Univ.)
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Speaker Author-1 
Date Time 2021-09-10 09:30:00 
Presentation Time 20 minutes 
Registration for CQ 
Paper # CQ2021-50 
Volume (vol) vol.121 
Number (no) no.173 
Page pp.59-64 
Date of Issue 2021-09-02 (CQ) 

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