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Paper Abstract and Keywords
Presentation 2012-05-18 16:15
[Invited Talk] On the Gradient Formation Incorporating Movement of Nodes for Gradient-based Routing in Delay Tolerant Networks
Yuki Koizumi, Hideyuki Kanai, Hiroyuki Ohsaki, Makoto Imase (Osaka Univ.) IN2012-22 RCS2012-41
Abstract (in Japanese) (See Japanese page) 
(in English) Gradient-based routing, where each node calculates a metric that indicates how useful a node might be in relaying messages to a destination node and transmits messages according to the metric, is one of promising approaches for Delay Tolerant Mobile Sensor Networks. However, existing gradient-based routing methods do not consider movement of nodes to form their gradient and this may result in inefficient message relays and degradation in their performance. In this paper, we discuss how node movements affects message delivery in gradient-based routing methods and propose a gradient-based routing method that incorporates node movements into its gradient to remedy inefficient message relays. The idea of our proposal is to identify nodes leaving from the destination node and nodes approaching to the destination node. Since those leaving nodes are less useful to relay messages to the destination node, our proposed method tries to prevent nodes from transmitting messages to nodes leaving from a destination node. Through simulation experiments, we show that our proposal decreases the average message delivery delay under various node mobility models. Our proposal reduces at most 50 \% of the average message delivery delay in the case that nodes move straightly. We also show that our proposal significantly decreases the maximum message delivery delay.
Keyword (in Japanese) (See Japanese page) 
(in English) Delay Tolerant Networking / Routing / Gradient-based Routing / / / / /  
Reference Info. IEICE Tech. Rep., vol. 112, no. 28, IN2012-22, pp. 61-66, May 2012.
Paper # IN2012-22 
Date of Issue 2012-05-10 (IN, RCS) 
ISSN Print edition: ISSN 0913-5685    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 IN2012-22 RCS2012-41

Conference Information
Committee IN RCS  
Conference Date 2012-05-17 - 2012-05-18 
Place (in Japanese) (See Japanese page) 
Place (in English) Kuramae-Kaikan, Tokyo Institute of Technology 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Wireless Internet, Multi-hop network, Mesh network, Network coding, Cross layer technique, Wireless communication, etc. 
Paper Information
Registration To IN 
Conference Code 2012-05-IN-RCS 
Language English (Japanese title is available) 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) On the Gradient Formation Incorporating Movement of Nodes for Gradient-based Routing in Delay Tolerant Networks 
Sub Title (in English)  
Keyword(1) Delay Tolerant Networking  
Keyword(2) Routing  
Keyword(3) Gradient-based Routing  
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1st Author's Name Yuki Koizumi  
1st Author's Affiliation Osaka University (Osaka Univ.)
2nd Author's Name Hideyuki Kanai  
2nd Author's Affiliation Osaka University (Osaka Univ.)
3rd Author's Name Hiroyuki Ohsaki  
3rd Author's Affiliation Osaka University (Osaka Univ.)
4th Author's Name Makoto Imase  
4th Author's Affiliation Osaka University (Osaka Univ.)
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Speaker Author-1 
Date Time 2012-05-18 16:15:00 
Presentation Time 45 minutes 
Registration for IN 
Paper # IN2012-22, RCS2012-41 
Volume (vol) vol.112 
Number (no) no.28(IN), no.29(RCS) 
Page pp.61-66(IN), pp.115-120(RCS) 
#Pages 6 
Date of Issue 2012-05-10 (IN, RCS) 

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