摘要
Leach协议的提出很大程度上延长了网络的生命周期,但簇头的选取并未考虑当前节点剩余能量和节点分布情况,导致网络能量消耗不平衡。改进的簇头选择协议NCHS-Leach（Novel Cluster Head Selecting Leach）存在没有考虑节点当选簇头次数以及节点距离基站的距离等问题。据此,该文提出了改进协议—基于权值的簇头选取NPCHS-Leach（Novel Power Clus-ter Head Selecting Leach）协议,在选取簇头节点时综合考虑节点的剩余能量、距离、节点成为簇头的次数以及侦听密度,优化簇头节点选取策略延长网络生命周期。通过MATLAB工具软件随机建立的网络拓扑模拟NPCHS-Leach协议、Leach协议以及NCHS-Leach协议的运行,其仿真结果表明该协议比NCHS-Leach协议延长网络生命周期40~50%。
The Leach protocol has been proposed to much extend the life cycle of the network,but the selection ofcluster heads has not considered the present residual energy of nodes and nodes distribution,which leads to unbal-anced energy consumption of the network. Its improved NCHS-Leach protocol has exist several problems,such as itdoes not consider the number of a node being elected cluster head node and the distance from the base station to clus-ter head node. Accordingly,this paper proposes an improved protocol,the NPCHS-Leach protocol,which comprehen-sively considers nodes＇ residual energy,the distance from the base station to the cluster head node,the number of anode being a cluster head and listen density to optimize the selection strategy of cluster head node to extend the net-work life cycle while selecting the cluster head nodes. Through a network topology established randomly by MATLABsimulates the operation of NPCHS-Leach protocol,Leach protocol and NCHS-Leach protocol,the simulation resultsshow that NPCHS-Leach protocol can extend 40-50% of the network life cycle more than NCHS-Leach protocol.
出处
《传感技术学报》
CAS
CSCD
北大核心
2015年第12期1846-1852,共7页
Chinese Journal of Sensors and Actuators
基金
国家自然科学基金面上项目(61100215)
湘潭大学项目(kz08051)
关键词
无线传感器网络
低能耗
权重
分簇
LEACH协议
wireless sensor networks
low energy consumption
weights
clustering
leach protocol
