Node state optimization based coverage control algorithm for wireless sensor networks

One of the main applications of wireless sensor networks is to provide proper coverage of their deployment regions. In this paper, we discussed the tolerance coverage area based node scheduling algorithm, and then improved this algorithm by two ways: improving the coverage redundancy judgment strategy by introducing the relative remaining energy level(RREL), and optimizing node state distribution by increasing a node states "pre-active", and then proposed a node state optimization based coverage control algorithm NSO-CC. Simulation results show that NSO-CC effectively solves the problem of nodes non-uniform sleeping, improves the network coverage quality and prolongs the network lifetime.