无线传感网LEACH协议的改进方法

An improved method of LEACH protocol for wireless sensor networks

为解决传统LEACH(Low Energy Adaptive Clustering Hierarchy)协议网络节点能量消耗高、存活数量少和生存寿命短等问题,提出了一种LEACH-AD改进方案。该算法引入最优簇头比率P值、加入距离因子、剩余能量因子和密度因子等因素更新的阈值公式进行分簇以及簇间的传输。实验结果表明,改进后的LEACH-AD协议在首个死亡节点、10%死亡节点以及全部死亡节点分别比原LEACH协议延长138轮、195轮、628轮。在能量消耗方面比原LEACH协议多持续了631轮,改进后的路由协议减少了网络节点的能量消耗量,从而有效延长了无线网络与传感节点的工作时间,这对无线监测系统的研究与开发意义重大。

In order to solve the problems of traditional LEACH(Low Energy Adaptive Clustering Hierarchy)protocol network nodes,such as high energy consumption,small survival number and short survival time,an improved LEACH-AD scheme is proposed.The algorithm introduces the optimal cluster head ratio P value,adding distance factor,residual energy factor and density factor and other factors to update the threshold formula for clustering and transmission between clusters.The experiment results show that the improved leach-ad protocol has 138,195 and 628 rounds longer than the original LEACH protocol in the first dead node,10%dead node and all dead nodes,respectively.In terms of energy consumption,it lasted 631 more rounds than the original LEACH protocol.The improved routing protocol reduces the energy consumption of network nodes,thus effectively prolonging the working time of wireless networks and sensor nodes,which is of great significance to the research and development of wireless monitoring systems.