WSN中低功耗路由协议LEACH的一种改进方法  

An Improved Method in LEACH of a Low-power Routing Protocol for WSN

作　　者：周冲[1] 余震虹[1] 卜凡云[1] 钱菲菲[1] 

机构地区：[1]江南大学物联网工程学院通信研究所,无锡214122

出　　处：《科学技术与工程》2011年第21期5070-5074,5079,共6页Science Technology and Engineering

摘　　要：在无线传感器网络中,针对节点有限的能量资源,路由的设计必须以节能为重要目标。这对整个网络的生存时间至关重要。对LEACH协议进行了深入的分析。针对LEACH协议在簇头选择算法上过大的随机性以及分簇次数过多的问题进行了优化。在簇头选择过程中加入能量影响因素,使剩余能量大的节点更有机会当选为簇头。另外在稳定运行过程中也加入了能量阈值防止下一轮分簇的过早发生。仿真结果表明,改进后的算法相比原LEACH算法能有效地平衡网络整体的能量消耗,延长网络的生存时间。In wireless sensor networks,with the limitation of nodes＇ energy resources,energy conservation must be paid for an important objective for the routing design,which is crucial to the survival time of the entire networks.LEACH protocol in depth is analyzed,and proposed some optimization measures.According to the problems of too much randomness in cluster-heads selecting and too large clustering frequency,the energy factors in the process of cluster-heads selecting is joined to make the chance of nodes with larger residual energy greater,besides,joined the energy threshold in the process of stable operation to prevent the next round of cluster-heads selecting.Simulation results show that,compared to the original LEACH,the modified algorithm could balances the energy consumption,and prolongs the survival time of the entire networks.

关 键 词：无线传感器网络 LEACH 分簇路由 簇头选择 

分 类 号：TP393.04[自动化与计算机技术—计算机应用技术]