Abstract：For wireless sensor networks, the energy of sensor node is very limited, and there are a lot of redundant nodes when it is densely deployed. Therefore, a 3D coverage scheme based on hibernation of redundant nodes and phased waking-up strategy for wireless sensor networks is proposed. A large number of sensor nodes are randomly deployed in the monitoring region and the redundant nodes can hibernate. The hibernated nodes will be waken up in phases after the on-duty nodes are exhausted. The process of hibernating/waking-up lasts until all of the nodes in the entire sensor network are exhausted. The simulation results show that this method improves the network performance. Besides, with the same number of nodes deployed in the 3D monitoring region, the phased waking-up strategy outperforms the none-phased waking-up strategy, and waking up the nodes after hibernation achieves higher network performance than the method of directly waking up in turn.
2009, Vol. 31 
