LEACH协议的改进与仿真分析

Simulation Analysis and Improvement of LEACH Protocl

在深入分析无线传感器网络路由协议设计目标的基础上,由于低功耗自适应分簇路由协议(LEACH,Low Energy Adaptive Clustering Hierarchy)簇头既要融合簇内节点发送来的数据又要将处理后的数据发送给基站,导致能量消耗较大。因此融入负载平衡和簇内成链的思想对LEACH协议进行改进,通过贪婪算法使簇内节点数据传输采用链式传输,让簇头工作时间尽量延长,使簇的稳定阶段时间提高,全网节点负载均衡。通过NS2对改进的LEACH协议进行仿真分析,结果表明改进的LEACH协议网络寿命极大延长。

Based on in-depth analysis of the design goal of routing protocol for the wireless sensor network,and for the cluster head of low Energy Adaptive Clustering Hierarchy protocol would both fuse the data sent by cluster nodes and transfer the processed data to the base-station,thus the energy consumption becomes fairly large.Therefore the idea of load balance and formed chain of cluster nodes is introduced to improve LEACH,while the greedy algorithm is used to make the data transmission in chains,and the work time of the cluster head is extended as much as as possible.This could improve the stable phase of the cluster and realize load balance of the whole network nodes.The simulation with NS2 network simulation tool shows that the network life-time with this modified LEACH protocol could be greatly extended.