Sensor Node Localization by Three Mobile Anchors in the Wireless Sensor Networks

Seunghak LEE  Namgi KIM  Heeyoul KIM  Younho LEE  Hyunsoo YOON  

Publication
IEICE TRANSACTIONS on Information and Systems   Vol.E94-D   No.10   pp.1981-1988
Publication Date: 2011/10/01
Online ISSN: 1745-1361
Print ISSN: 0916-8532
Type of Manuscript: PAPER
Category: Information Network
Keyword: 
sensor localization,  sensor deployment,  mobile anchor,  sensor network,  

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Summary: 
For the deployment of sensor networks, the sensor localization, which finds the position of sensor nodes, is very important. Most previous localization schemes generally use the GPS signal for the sensor localization. However, the GPS signal is unavailable when there is an obstacle between the sensor nodes and satellites. Therefore, in this paper, we propose a new localization scheme which does not use the GPS signal. The proposed scheme localizes the sensors by using three mobile anchors. Because the three mobile anchors collaboratively move by themselves, it is self-localizable and can be adopted even when the sensors are randomly and sparsely deployed in the target field.