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This paper studies a field coverage problem of wireless sensor networks. The objective is to prolong the network life for active sensing coverage. The problem is modeled using cellular automata. One deterministic algorithm and one probabilistic algorithm are proposed to extend the network life time. Both algorithms allow the activation of a particular sensor be determined by the current state of its...
The number of cooperative sensors to use is a compromise between sensing performance and resources usage efficiency. The definition of the optimal cooperative sensor set is given out firstly and then a greedy selection algorithm for the optimal cooperative sensor set is proposed which can use fewest cooperative sensors to maximize the resources usage efficiency, while still having enough for the sensing...
Although the method of cooperative spectrum sensing can greatly improve the sensing performance, the consumption of system resources will increase as the number of cooperative sensors increases, therefore, the number of cooperative sensors to use is a compromise between sensing performance and consumption of system resources. Firstly, based on the expression for the probability of detection, a sensor...
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