Adaptive scheduling of wireless video sensor nodes for surveillance applications
Proceedings of the 4th ACM workshop on Performance monitoring and measurement of heterogeneous wireless and wired networks
WD'09 Proceedings of the 2nd IFIP conference on Wireless days
Journal of Network and Computer Applications
Coverage and activity management of wireless video sensor networks for surveillance applications
International Journal of Sensor Networks
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The expected lifetime of any wireless sensor network is a critical issue as sensor nodes are powered by small batteries. One effective approach for energy conservation, especially in high density networks, consists on switching alternatively nodes in sleep/active modes, while ensuring at the same time continuous monitoring (i.e., coverage and connectivity). This approach is called activity scheduling. In this paper we propose a novel approach to achieve energy savings by organizing the sensor nodes into disjoint sets (rounds) which are activated successively. The key idea behind our approach is to exploit a mobile beacon, primarily used to localization purposes, to additionally constructs sets of active nodes. The simulation results we obtained validated the effectiveness of our approach in comparison to existing ones.