基于最佳簇数的无线传感器网络粒子群分簇协议

A Particle Swarm Clustering Protocol for Wireless Sensor Networks Based on Optimal Number of Clusters

对层簇式无线传感器网络中的分簇协议进行了探讨。研究了经典的LEACH协议,分析了其缺陷,并提出了ILEACH协议。ILEACH协议首先按照一定的原则来计算最佳簇数目,并以此作为分簇的目标。簇重组阶段选择新簇首时,兼顾了节点的剩余能量与位置分布两个因素,并采用粒子群优化算法来计算,取得了较好的结果。仿真表明,ILEACH协议有效的节省了能量,延长了网络的生存时间。

Clustering protocols for layer-cluster wireless sensor networks are discussed. Following the study of classical LEACH protocol with its defects analyzed, the ILEACH protocol is proposed. In the initial stage, ILEACH protocol calculates the optimal number of clusters as a target for clustering with certain principles. In the cluster reorganization stage, residual energy and location distribution of nodes are taken into account to select a new cluster head with particle swarm optimization algorithm. Encouraging results are achieved. Simulations have shown that ILEACH protocol can save energy effectively and prolong the lifetime of network greatly.