中文摘要：

针对无线传感器网络路由协议LEACH（Low Energy Adaptive Clustering Hierarchy）算法中簇头选择不合理以及节点能耗不均的缺点,提出了一种基于LEACH的节能算法LEACH-RA。所有节点分为固定的簇,簇内节点根据所处簇的半径进行自适应的选择簇头。通过NS2仿真证明了改进后的协议有效克服了LEACH由随机簇头选择策略导致的节点能耗不均匀的现象,从而延长了网络的寿命。

英文摘要：

LEACH（Low Energy Adaptive Clustering Hierarchy）is one of the popular routing protocols for WSN（Wireless Sensor Network）,cluster head selection algorithm and the inequality of node power consumption are unreasonable disadvantages so that an energy saving method LEACH-RA（LEACH-Radius Adaptive）is proposed based on LEACH.All nodes are divided into fixed clusters,cluster node adaptively joins cluster according to the cluster radius.NS2 simulation proves that the improved routing protocol is effective for overcoming non-uniform energy consumption in nodes which is due to random cluster head selection strategy in LEACH,thereby extending the lifetime of the network.