摘要： 针对传统LEACH 协议中簇头数量自由度高以及分布不均所导致能量消耗过多的缺陷,提出一种基于优 化分簇的、能耗均匀的改进LEACH 协议。改进簇头选择机制,在常规能量阈值选取簇头节点的过程中,引入最优 簇半径控制策略,改善簇头节点的物理分布位置,达到网络能量的均衡,同时引入网络覆盖率控制簇头数目,避免 产生多余的簇头节点。该算法还在传统LEACH 协议的基础上,使用CH-VCH 交替轮寻策略简化计算量。仿真结 果表明,该改进LEACH 协议能解决传统LEACH 协议存在的能量问题,使网络的能量消耗更加均匀,并在一定程 度上延长网络的生存期限。

关键词: LEACH 协议, 能量消耗, 最优簇半径, 簇头

Abstract: As high free degree of amount and uneven distribution of the cluster-head nodes cause high energy consumption,this paper presents a novel improved LEACH protocol algorithm based on cluster optimization and energy balance. In the process of selecting cluster-heads according to the conventional energy threshold,the improved selection mechanism selects cluster-head with the optimal cluster-radius control strategy and optimizes the distribution of cluster-head nodes. In the meantime,the coverage rate is put forward to avoid extra cluster-heads and keep the amount of cluster-head nodes. It uses CH-VCH alternate circulated strategy to simplify the calculation. The simulation reveals that the improved LEACH protocol can solve the problem that the traditional one can not do. It can average the energy consumption and prolong the survival period of the wireless sensor networks.

Key words: LEACH protocol, energy consumption, optimal cluster-radius, cluster-head

中图分类号: 

• TP393. 02