一种基于能量和位置的LEACH协议优化  

An Improvement of LEACH Protocol Based on Energy and Distance

作　　者：张伟伟[1] 王俊[2] 秦琳琳[1] 吴刚[1] 

机构地区：[1]中国科学技术大学自动化系,安徽合肥230026 [2]合肥学院电子信息与电气工程系,安徽合肥230022

出　　处：《计算机仿真》2010年第3期136-139,160,共5页Computer Simulation

基　　金：国家高技术研究发展计划(863计划)基金资助项目(2006AA10Z253);教育部新世纪优秀人才支持计划(NCET-04-0564);安徽高校省级自然科学研究重点项目(KJ2009A012)

摘　　要：由于传感器节点电池能量有限,研究在无线传感器网络中节能是关键问题。根据经典的LEACH协议,提出了一种新型的簇首选择机制,算法通过加权思想综合考虑了节点的剩余能量和地理位置参数来优化簇首的选择。权衡考虑能量负载平衡和网络生存时间之间的关系,以得到较为理想的加权因子。针对网络节点初始能量分布均衡与否,用ns2进行仿真,证明算法可收集更多的现场数据,并有效地延长了网络生存周期,仿真结果表明改进后的协议适合在初始节点能量不均衡的网络中应用,节能效果明显。Due to the special character of the wireless sensor network and energy constraint of the sensor nodes, the energy- efficient is key problem which should be solved in the wireless sensor network. Based on the study of LEACH, a new strategy of cluster - heads election is presented in this paper. The remaining energy and the position of the sensor node were taken as the parameter through weighting thought to optimize the process of cluster - head selection. And based on weighing the relationship between the energy load＇ s proportionality and network＇ s lifetime, an ideal weighting factor was obtained. According as the nodes initial energy distribution is balanced or not, the simulation results with NS2 show that the new strategy of cluster- heads election can increase the number of data received, and prolong network＇ s lifetime effectively, also, the new strategy is suitable for the initial energy imbalanced net- work.

关 键 词：无线传感器网络 簇首选择 网络生存时间 优化 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]