About this Journal Submit a Manuscript Table of Contents
International Journal of Distributed Sensor Networks
Volume 2012 (2012), Article ID 515906, 10 pages
http://dx.doi.org/10.1155/2012/515906
Research Article

Adaptive Sensor Activation Algorithm for Target Tracking in Wireless Sensor Networks

College of Automation, Chongqing University, Chongqing 400030, China

Received 9 December 2011; Revised 28 February 2012; Accepted 22 March 2012

Academic Editor: Aditya Karnik

Copyright © 2012 Wei Zhou et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Target tracking is an important application of wireless sensor networks where energy conservation plays an important role. In this paper, we propose an energy-efficient sensor activation protocol based on predicted region technique, called predicted region sensor activation algorithm (PRSA). The proposed algorithm predicts the moving region of target in the next time interval instead of predicting the accurate position, by analyzing current location and velocity of the target. We take these nodes within the predicted region as waiting-activation nodes and establish activation strategy. The fewest essential number of sensor nodes within the predicted region will be activated to monitor the target. Thus, the number of nodes that was involved in tracking the target will be decreased to save energy and prolong the network’s operational lifetime. The simulation results demonstrate the effectiveness of the proposed algorithm.