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ThinkMind // ICWMC 2011, The Seventh International Conference on Wireless and Mobile Communications // View article icwmc_2011_3_40_20192


A Hop-Oriented Position Estimation Algorithm for Wireless Sensor Networks

Authors:
Hsing-Lung Chen
Li-Chung Lin
Shu-Hua Hu

Keywords: sensor nodes; GPS; broadcast; hop count; beacon nodes; normal nodes

Abstract:
A wireless sensor network consists of a group of sensor nodes that broadcast the sensed data to the base station hop by hop via radio frequency. It is useful only if the sensed data are associated with the locations of the sensor nodes. Therefore, location estimation of sensor nodes has become an important issue. Ideally, each sensor node can obtain its location by being equipped with a GPS device. However, this approach costs too much, contradicting the objective of low cost sensor nodes. Hence, it is reasonable that a few sensor nodes only are equipped with a GPS device, and the others estimate their own locations by way of the collected information. The purpose of this paper is to propose a hop-oriented position estimation algorithm (HOPE). Four beacon nodes, each equipped with GPS, broadcast the hop count information, and normal nodes rebroadcast the information after receiving it. Finally, normal nodes employ the received hop count information to estimate their own locations with simple calculations. The simulation results show that the proposed algorithm has better accuracy for location estimation than other proposed methods.

Pages: 65 to 70

Copyright: Copyright (c) IARIA, 2011

Publication date: June 19, 2011

Published in: conference

ISSN: 2308-4219

ISBN: 978-1-61208-140-3

Location: Luxembourg City, Luxembourg

Dates: from June 19, 2011 to June 24, 2011

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