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Localized policy-based target tracking using wireless sensor networks

Published: 02 August 2012 Publication History

Abstract

Wireless Sensor Networks (WSN)-based surveillance applications necessitate tracking a target's trajectory with a high degree of precision. Further, target tracking schemes should consider energy consumption in these resource-constrained networks. In this work, we propose an energy-efficient target tracking algorithm, which minimizes the number of nodes in the network that should be activated for tracking the movement of the target. We model the movement of a target based on the Gauss Markov Mobility Model [Camp et al. 2002]. On detecting a target, the cluster head which detects it activates an optimal number of nodes within its cluster, so that these nodes start sensing the target. A Markov Decision Process (MDP)-based framework is designed to adaptively determine the optimal policy for selecting the nodes localized with each cluster. As the distance between the node and the target decreases, the Received Signal Strength (RSS) increases, thereby increasing the precision of the readings of sensing the target at each node. Simulations show that our proposed algorithm is energy-efficient. Also, the accuracy of the tracked trajectory varies between 50% to 1% over time.

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    cover image ACM Transactions on Sensor Networks
    ACM Transactions on Sensor Networks  Volume 8, Issue 3
    July 2012
    255 pages
    ISSN:1550-4859
    EISSN:1550-4867
    DOI:10.1145/2240092
    Issue’s Table of Contents
    Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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    Publication History

    Published: 02 August 2012
    Accepted: 01 January 2011
    Revised: 01 October 2010
    Received: 01 August 2009
    Published in TOSN Volume 8, Issue 3

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    Author Tags

    1. Kalman Filter
    2. Markov Decision Processes
    3. Target Tracking
    4. Wireless Sensor Networks

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