Abstract: Concerning the deficiencies of Low Energy Adaptive Clustering Hierarchy (LEACH) routing protocol that cluster-head nodes selection is unreasonable and cluster-head nodes consume excessive energy in the process of long-distance data transmission, an improved routing protocol named LEACH-EDH was proposed. In the set-up phase,the remaining energy and the geographical position of nodes were fully considered. In the steady-state phase, a modified hybrid approach was also introduced to the communication between cluster-head and Base Station (BS), simulation results show that the algorithm effectively balances the energy consumption of the networks and achieves an obvious improvement on the network lifetime.

Key words: Low Energy Adaptive Clustering Hierarchy (LEACH) protocol, routing protocol, balanced energy

摘要： 针对低功耗自适应分簇(LEACH)路由协议中簇头节点选择的不合理以及在远距离数据传输过程中能量消耗过多的不足,提出了一种新的改进算法--LEACH-EDH。在分簇阶段,它充分考虑了节点的能量和地理位置;在传输阶段,采用了基于概率的混合路由算法。仿真结果表明,该算法有效地平衡了网络的能量消耗,并显著地延长了网络的存活时间。

关键词: 低功耗自适应分簇协议, 路由协议, 能量平衡