WSN中LEACH路由协议簇头数优化研究

Research on optimal cluster-head number of LEACH routing protocol for WSN

基于簇的LEACH路由协议在大规模无线传感器网络中有着良好的适应性,但在具体的网络分簇过程中由于每轮选择簇头节点时并没有考虑簇头节点的数量从而造成被选簇头节点的数量过多或过少,导致传感器节点因为不必要的数据融合或数据传输距离过长而消耗过多的能量,缩短了整个网络的寿命。为克服这些问题,提出了一种优化簇头数的方法,计算出一个区域内最佳的簇头数范围,通过控制簇头的数量来改善网络的性能。仿真结果证明该算法能够提高网络的整体性能,延长网络的生存时间。

Cluster-based LEACH routing protocol had good adaptability for large-scale wireless sensor networks.More or less cluster heads were selected without taking into account the number of cluster heads during the cluster forming process in network.So these nodes had to consume additional energy because of data fusing or the long distance of data transmission and consequently reduced the network life-span.This paper proposed a new cluster-heads selection algorithm to improve the network performance by controlling the number of cluster heads in an area.The simulation experiment indicates that this optimal algorithm extended the network life-span and reduced the average energy consumption in network.