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Paper Abstract and Keywords
Presentation 2007-05-25 10:10
A Localization Algorithm for Nonuniform Propagation Environments in Sensor Networks
Noriaki Kitakoga, Tomoaki Ohtsuki (Keio Univ.) USN2007-10
Abstract (in Japanese) (See Japanese page) 
(in English) Source (target) localization is one of the interesting applications of sensor networks. Localization algorithms that use received signal strength (RSS) measurements at individual sensor nodes are proposed. The maximum likelihood (ML) algorithm is known as an algorithm for source localization. In uniform propagation environments, the ML algorithm has high accuracy to estimate source location. Meanwhile, in nonuniform propagation environments, the ML algorihm has low accuracy because this algorihm uses RSS from all {the} sensor nodes equivalently. The residual weighting (RWGH) has been proposed to reduce the effect of the nonuniform propagation environments. This algorithm first set subsets of sensor nodes. The source location is estimated using the sensor nodes in each subset. The final estimated result is the averaged value of the estimated results of all the subsets weighted by the reliabilities.
The reliability of each subset is the residual error of the distances between the source and each sensor node estimated by two ways. In the RWGH algorithm, the reliability of each subset may be high although the estimation error of the subset is large. This affects the final estimated result. In this report, we propose the localization algorithm to eliminate the subsets having high reliability values but with large estimation errors. We show that the proposed algorithm has higher accuracy than the ML and RWGH algorihms.
Keyword (in Japanese) (See Japanese page) 
(in English) Sensor Network / Localization / Nonuniform Propagation Environments / Received Signal Strength / RSS / / /  
Reference Info. IEICE Tech. Rep., vol. 107, no. 53, USN2007-10, pp. 49-53, May 2007.
Paper # USN2007-10 
Date of Issue 2007-05-17 (USN) 
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)
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Conference Information
Committee USN  
Conference Date 2007-05-24 - 2007-05-25 
Place (in Japanese) (See Japanese page) 
Place (in English) Tokyo Denki University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Fundamental theories for ubiquitous and sensor networks, etc. 
Paper Information
Registration To USN 
Conference Code 2007-05-USN 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Localization Algorithm for Nonuniform Propagation Environments in Sensor Networks 
Sub Title (in English)  
Keyword(1) Sensor Network  
Keyword(2) Localization  
Keyword(3) Nonuniform Propagation Environments  
Keyword(4) Received Signal Strength  
Keyword(5) RSS  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Noriaki Kitakoga  
1st Author's Affiliation Keio University (Keio Univ.)
2nd Author's Name Tomoaki Ohtsuki  
2nd Author's Affiliation Keio University (Keio Univ.)
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Speaker Author-1 
Date Time 2007-05-25 10:10:00 
Presentation Time 25 minutes 
Registration for USN 
Paper # USN2007-10 
Volume (vol) vol.107 
Number (no) no.53 
Page pp.49-53 
#Pages 5 
Date of Issue 2007-05-17 (USN) 

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