优化QoS的基于LEACH的无线传感器网络路由协议

A LEACH-Based Routing Protocol for Wireless Sensor Network to Optimize QoS

为了保证无线传感器网络通信质量,同时尽可能地减少路由能量的消耗,对传统的LEACH算法进行改进,提出一种基于LEACH的优化通信质量的无线传感器网络路由协议——节点密度控制算法DC-LEACH算法.本协议的基本思想是通过选取具有良好通信位置的节点作为LEACH算法的簇首,减少网络中节点分布不均匀的情况对能量损耗和通信质量所造成的影响.协议采用概率分析的方法确定最优检测邻域范围,根据检测区域的节点密度确定簇首筛选阈值以进行簇首选举,建立分簇形式的网络路由协议.仿真实验的结果表明,本文提出的改进型协议能够在有效节约能耗的同时提高网络的通信质量.

The density-constrained low-energy adaptive clustering hierarchy protocol, i.e., DC -LEACH, is proposed to meet the QoS requirement and minimize the energy consumption. Selecting the nodes in proper position as the clustering heads, the routing protocol reduces the energy consumption and alleviates the adverse effect on the communication quality, both resulting from the nonuniform distribution of nodes in network. In the protocol the probability analysis is made to fix the optimum measuring range in which the clustering heads are selected according to the threshold value of node density, thus giving the routing protocol of the network in clustering form. The simulation results showed that the improved protocol is able to not only reduce the energy consumption but also guarantee the communication quality.