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1 LIGM - Laboratoire d-Informatique Gaspard-Monge 2 PASNET LIA - Laboratoire Informatique d-Avignon

Abstract : In this paper we address the problem of Object Tracking in WSN. We define Mobile Object Tracking as a two stage process: 1 detecting the presence of the object in the monitoring area and 2 locating it at each stage of its progression in the area. We propose a Collaborative Tracking Algorithm named CTA. CTA is a distributed protocol that runs on Heterogeneous WSN HWSN which consists of two types of sensors: Motion Sensors MS and Camera Sensors CS. The MS deals with the detection phase and then activates the CS based on a probabilistic threshold. In addition to the tracking algorithm, we propose a deployment strategy and study its impact on CTA. The efficiency of our proposed solution is evaluated according to simulation performed. The obtained results are compared to three existing solutions: 1 Naïve solution where only CSs are deployed always in active mode; 2 OCNS Optimal Camera Node Selection is cluster-based approach with a CS election and 3 EAOT, our previously proposed algorithm based on heuristic CS wake up. We observe that CTA significantly reduces the tracking cost in term of energy consumption up to 38% of energy saved compared to other algorithms. It also performs tracking up to 37.5% on the tracking accuracy.

Keywords : Wireless Sensor Networks Wireless Multimedia Sensor Network Wireless Heterogeneous Wireless Sensor Network tracking mobile target

Autor: Ibtissem Boulanouar - Stéphane Lohier - Abderrezak Rachedi - Gilles Roussel -

Fuente: https://hal.archives-ouvertes.fr/


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