无线传感器网络功率路由算法研究

无线传感器网络的应用越来越广泛，主要是军事、工业、医疗等方面。然而无线传感器网络具有节点能量、存储和计算能力非常有限等特点，文中在传统的LEACH（低功耗自适应集簇分层型）协议的基础上进行了改进，并提出了一种新的无线传感器网络路由算法LEACH-N。新算法沿用了LEACH协议簇的结构，在簇头选择方法上基于传统DCHS算法的簇头选择算法，簇内成员与簇头之间直接通信，簇头与基站之间轮流进行单跳和多跳通信；多跳通信则是采用一种改进的MTE（最小传输能量）路由算法。通过NS2仿真软件对LEACH-N协议与LEACH协议分别进行了性能测试。实验结果表明，相比LEACH协议，LEACH—N协议系统能耗低、网络生命周期长，且具有更好的规模可扩展性。

A Study on Power Routing Protocols in Wireless Sensor Networks

Wireless Sensor Networks （WSNs） are employed in military, industry, medical care and so on. WSNs have unique characteristics, such as the sensor nodes are severely constrained by energy, storage capacity and computing power. Based on the traditional routing protocol LEACH, a new protocol LEACH-N which also uses the architecture of cluster is proposed. In LEACH-N, the algorithm of selecting cluster heads of DCHS protocol is adopted, the nodes in cluster communicate with the cluster head directly, and the cluster heads communicate with the base station directly and via several intermediate nodes which are elected accord- ing to the changed MTE routing by turns. LEACH-N and LEACH protocols are tested on the simulation plat- form NS2. Compared to LEACH routing protocol, the results show that LEACH-N protocol operates with lower energy consumption, has longer lifetime and better scalability.