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Issue No.10 - October (2008 vol.19)
pp: 1426-1438
Wireless sensor networks have been widely used in many surveillance applications. Due to the importance of sensor nodes in such applications, certain level of protection need to be provided to them. We study the self protection problem for static wireless sensor networks in this paper. Self protection problem focuses on using sensor nodes to provide protection to themselves instead of the target objects or certain target area, so that the sensor nodes can resist the attacks targeting on them directly. A wireless sensor network is p-self-protected, if at any moment, for any wireless sensor (active or non-active), there are at least p active sensors that can monitor it. The problem finding minimum p-self-protection is NP-complete and no efficient self protection algorithms have been proposed. In this paper, we provide efficient centralized and distributed algorithms with constant approximation ratio for minimum p-self-protection problem in sensor networks with either homogeneous or heterogeneous sensing radius. In addition, we design efficient distributed algorithms to not only achieve p-self-protection but also maintain the connectivity of all active sensors. Our simulation confirms the performances of proposed algorithms.
Sensor networks, Algorithm/protocol design and analysis, Network topology, Network Protocols
Yu Wang, Xiang-Yang Li, Qian Zhang, "Efficient Algorithms for p-Self-Protection Problem in Static Wireless Sensor Networks", IEEE Transactions on Parallel & Distributed Systems, vol.19, no. 10, pp. 1426-1438, October 2008, doi:10.1109/TPDS.2008.13
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