A Redundant and Energy-Efficient Clusterhead Selection Protocol for Wireless Sensor Network

Cluster-based routing protocol is currently a hot research in wireless sensor network. In this paper, we propose an improved method RECHS(Redundant and Energy-efficient Clusterhead Selection) for LEACH protocol to balance network load and to extend the network life. In order to selecting reasonable clusterheads, our scheme first selects initial clusterheads and initial redundant clusterheads. By comparing of the two nodes with our method, the node which has better performance will be elected as clusterhead, and the other node will be as redundant clusterhead at the current round. The new algorithm is an effective solution for the problem of the unreasonable distribution of clusterhead, as well as the issue of the clusterhead fails. Simulation results show that it prolongs the network life effectively, the time which first node dies, half of the nodes alive and last node dies is later than LEACH, the security of network has also been increased.