基于簇头阈值优化的LEACH的分簇路由

Correction Threshold-based Improved LEACH Clustering Protocol for Wireless Sensor Networks

为了平衡网络能量消耗、扩延网络寿命,提出基于低功耗自适应簇分层(Low Energy Adaptive Clustering Hierarchy,LEACH)的修正簇间路由,记为LEACH-C。与LEACH协议不同,LEACHC协议从节点分布和节点剩余能量情况,选择簇头。具体而言,LEACH-C协议首先计算节点分布密度,然后通过引入节点分布密度因子和剩余能量因子对LEACH协议的阈值进行修正。同时,依据节点分布密度,自适应地调整节点传输距离,进而平衡能量消耗。仿真结果表明,提出的LEACH-C协议降低了能耗,扩延了网络寿命。与LEACH协议相比,LEACH-C协议的能量消耗下降50%,网络寿命提高了约38. 2%。

In order to reduce the energy consumption and prolong the network lifetime of Wireless Sensor Networks(WSNs),improved LEACH(Low Energy Adaptive Clustering Hierarchy) algorithm is proposed in this paper,which is marked as LEACH-C. Compared with LEACH,LEACH-C select Cluster headers in terms of distributed density of nodes and residual energy of nodes. In LEACH-C,the distributed density of node is computed firstly,and distributed density of node factor and distance factor is introduced to correct threshold function for LEACH protocol. Moreover,the transmission range of node is adaptive to adjust by the distributed density of node,which aims to balance the energy consumption. Simulation results show that LEACH-C protocol is able to reduce energy consumption,and prolong the network lifetime. Compared with LEACH,the energy consumption is reduced by 50%,and network lifetime by about 38. 2%.