无线传感器网络LEACH协议的分析与改进

Analysis and Improvement of LEACH Protocol in Wireless Sensor Network

无线传感器网络中节点能量资源是非常有限的,能耗的降低对网络寿命的延长产生着至关重要的影响。在介绍无线传感器网络基本概念的基础之上,对LEACH路由协议的原理进行了简要说明,并分析了其缺点。探讨了一些以LEACH为基础的改进协议。在群首选择机制方面对LEACH协议进行了改进。在NS2平台上以生命周期为指标对LEACH协议及改进后的协议进行了模拟,结果表明当使用改进协议时,网络有着更长的寿命。

The sensor nodes in wireless sensor network have limited energy.So how to reduce energy consumption to extend the lifetime of the network is very important.On the basis of introducing the basic conception of wireless sensor network,the principle of LEACH is briefly described.And the defects are analyzed.Some improvements to LEACH-based protocols are discussed such as TEEN,PEGASIS,LEACH-C,and ERA.In this study,this paper proposes a new protocol which is based on LEACH.Simulation results using the NS2 network simulator show that the proposed LEACH-NEW definitely reduces the energy consumption and prolongs the lifetime.