无线传感器网络路由协议LEACH的研究与改进

Improvement of Routing Protocol LEACH in Wireless Sensor Network

经典的分簇路由协议LEACH在无线传感器网络中有着非常广泛的应用,但LEACH协议在成簇时没有考虑簇头节点的能量和位置,所以网络能耗较大。针对LEACH协议能耗较大的问题,为延长网络生存期,在LEACH协议的簇头选择公式中加入节点剩余能量和距离的参数,提出改进的LEACH协议。在网络模拟软件NS2平台下,对改进的LEACH协议与原LEACH协议进行仿真比较分析,结果表明改进后的协议中各个节点能耗均衡,避免个别节点过早衰亡,可以延长网络生存期。

Classic clustering algorithm LEACH is widely used in wireless sensor networks, but does not consider energy of cluster head and position, so the network consumes energy greatly. To save energy of node and extend the life of network, on the basis of the LEACH algorithm, we proposed the improved LEACH-i. The LEACH-i adds energy and distance references in the election expression of cluster head, so the nodes which have more energy can be cluster head. On experimental simulation platform of the NS2, the LEACH-i algorithm is compared with LEACH algorithm. The results show that the network energy consumption is great- ly reduced, and the network life cycle is extended