无线传感器网络LEACH算法的改进

An improved LEACH algorithm of wireless sensor networks

节点能耗是判断无线传感器网络(WSNs)优劣的重要指标。WSNs节点一般由电池供电,节点间通讯距离越远能耗越大,因此,在研究WSNs时必须考虑节点的能耗与分布。经典低功耗自适应集簇分层协议(LEACH)在选簇首时没有考虑节点位置和剩余能量。本文在LEACH算法的基础上加入节点剩余能量和位置参数:基于节点的分布,优化汇聚节点位置;节点剩余能量越大当选簇首的概率越大。最后,通过MATLAB仿真实验验证改进后的算法均衡了网络节点的能耗,延长了网络寿命。

Energy consumption of nodes is an important indicator to judge the merits of wireless sensor networks （WSNs）. WSNs nodes are generally powered by batteries, the farther distance between nodes the greater energy consumption, therefore energy and position of the nodes must be considered when studying WSNs. Classic Low Energy Adaptive Clustering Hierarchy Protocol （LEACH） elects cluster head node without the position and remaining energy. In this paper, adding nodes energy and positional parameters on the basis of LEACH algorithm： according to the distribution of nodes to optimize the SINK nodes position; more remaining energy nodes are easy to become cluster head. Finally, MATLAB simulation proved that the improved algorithm balances the energy node, extends the network lifetime.