关键词: 无线传感器网络, 改进的低功耗自适应集簇分层型协议, 簇头选择, 负载均衡, 适合因子

Abstract: In recent years，as the development of wireless sensor network，people do some deep researches on cluster-based protocol，most around the prolongation of the lifetime of WSN and decline of energy consumed by the sensors.This paper analyses the cluster-heads generated arithmetic among LEACH and presents improved approach，adjusts the node’s threshold function chose to be cluster-head and considers comprehensive node’s residual energy and distance to base-station.Then their performance is compared.The simulation results show that the new strategy of cluster-heads election achieves great advance in sensor and network’s life-time.

Key words: Wireless Sensor Networks（WSN）, Modified-Low Energy Adaptive Clustering Hierarchy（M-LEACH）, cluster-head selection, load balancing, fitting factor