基于非竞争式簇首轮转的WSNs分簇优化方法

Optimization Method of WSNs Clustering Based on Non-competitive Cluster-Head Rotation

针对LEACH协议中节点网络能量效率低的问题,建立了分簇协议的能耗模型;基于对簇首竞选能耗和不同节点能耗差的分析,提出了一种基于非竞争式的WSNs簇首轮换方法:在每一个轮转周期的第一轮中竞选一次簇首,其余轮中采取固定轮转的方法依次让其它节点充当簇首;同时合理设置每轮中的数据收集次数,以便有效降低网络簇首竞选能耗;理论分析和仿真实验表明:改进的分簇算法能够有效地改善WSNs分簇协议的总能耗性能。

The paper established an energy consumption model in order to improve the lower energy efficiency of nodes in LEACH proto- col. A method of cluster--head rotation based on non--competitive mode was proposed, according to analysis result of the energy consump- tion difference value between the the different nodes and elected cluster--head. The means elected the cluster--head once only at the first round of each rotation cycle. Then the other nodes acted as a cluster--head by fixed rotary method in remaining round. Furthermore, reason- able collection times of data in each round also could effectively reduce the energy consumption of cluster--head election. Finally, the theoret- ical analysis and simulation results show that the power consumption performance of WSNs clustering was improved effective by this opti- mized clustering algorithm.