关键词: 无线传感器网络, 基站, 簇头, 候选簇头, 通信范围, 生存周期

Abstract: In model of multi-hop wireless sensor networks,if a cluster head is more close to the base station,it will have much more transmitting task,therefore the closer one will consume much more energy.Many classical clustering algorithms haven’t focused on this problem.Based on the idea of periodically changing cluster head,this paper improves classical clustering.On the one hand,the cluster forming area has been dynamically controlled.Clusters closed to the base station have a small size,and then the little gathering staff balances the cost of transmitting.Meanwhile multi-candidate cluster heads keep the cluster structure to save the frequent cluster infrastructure energy costs.Through simulation,the new algorithm has better performance than classical method in balancing nodes’ energy costs as well as extending the lifetime of the network.

Key words: Wireless Sensor Networks, base station, cluster head, candidate cluster head, communication range, life time