Abstract: In order to reduce the energy of clustering in Low Energy Adaptive Clustering Hierarchy(LEACH), this paper proposes an improved cluster-head election algorithm namely Election of Cluster Heads in the Cluster(LEACH-ECHC). If the residual energy of each cluster-head is lower than the given threshold, cluster-head election is done in the whole network. If the cluster-head’s residual energy is lower than the average residual energy, the election is done in the cluster. And the selection method of the threshold for electing cluster-head is optimized. Simulation results demonstrate that LEACH-ECHC has better energy efficiency, prolongs network lifetime, and makes node energy consumption more balanced.

Key words: WSN, Low Energy Adaptive Clustering Hierarchy(LEACH) protocol, election in the cluster, remaining energy, distance factor

摘要： 以减小LEACH协议簇形成过程中的能量消耗为目的，提出一种改进的簇头选举算法LEACH-ECHC。当所有簇头的剩余能量最小值小于某个阈值时，进行全网选举；当簇头能量小于该簇剩余能量的平均值时，进行簇内选举，并对簇头产生的阈值进行优化。仿真结果显示，LEACH-ECHC算法有更高的能量有效性，可以延长网络寿命，使节点能耗更均衡。

关键词: 无线传感器网络, LEACH协议, 簇内选举, 剩余能量, 距离因子

CLC Number: 

• TP393