基于节点密度的无线传感器网络簇首选取机制

Cluster-Head Selection Method Based on Node's Density for Wireless Sensor Networks

目的避免无线传感器网络簇首过早死亡,延长网络寿命.方法使簇首节点分布在节点部署比较密集的区域,避免簇首与簇内节点通信距离较远而使簇首耗能过大.结果提出一种基于簇首与簇内节点平均距离最小化的簇首选取方式,有效地降低了位于节点密度小区域的节点成为簇首的概率,从而将节点能量均衡分布到整个网络.仿真实验表明,随着网络规模的增大,所提算法与LEACH协议相比能够延长网络的生存时间20%以上.结论笔者所提簇首选取机制能够有效地延长网络寿命.

This paper presents a cluster-head selection method based on the lowest average distance between the cluster-head and its neighbor nodes. It reduces the probability for nodes to become cluster-heads in the area of sparse nodes, and makes the cluster-head deployed in more intensive region to reduce energy consumption as the communication distance between cluster-heads and the other simple nodes too large, thereby it distributes the node energy to the whole network more evenly. The simulation results show that the proposed algorithm can extend the network survival time for more than 20 %.