一种低功耗自适应集簇分层协议的优化算法

针对低功耗自适应集簇分层(LEACH,low energy adaptive clustering hierarchy)协议在簇头(CH,cluster head)选择和能量消耗方面的缺陷,提出了改进的LEACH协议,记为LEACH-Ⅰ(LEACH-improved)协议.LEACH-Ⅰ协议利用节点离基站的位置和剩余能量选择簇头,使得CH均匀分布.同时,减轻CH负担,从簇内选择剩余能量最大的节点作为数据融合节点,分担原本由CH完成的数据融合任务,平衡了节点间的能量消耗问题.实验结果表明,提出的LEACH-Ⅰ协议有效地延长网络生存时间,比LEACH、DDEEC的网络生存时间分别提高了60％、43％.

A Low Energy Adaptive Clustering Hierarchy-Based Improved Routing Protocol in WSN

In order to solve the problems of LEACH (low energy adaptive clustering hierarchy) on selecting cluster head(CH)and consumption imbalance,a LEACH-based improved routing protocol is proposed,which is marked as LEACH-I protocol.In LEACH-I protocol,the main idea of the improved algorithm is to consider the current position and the current energy of the node.Moreover,in order to lighten the burden of CH,the node with maximum residual energy is selected as data-fusion node,which completes the task that CH originally did,which balances the energy consumption between the nodes.Simulation results show that the proposed LEACH-I performs better in term of network lifetime as compared to the existing cluster formation-based protocols.The network lifetime with using of our proposed protocol can be improved about 60% and 43% compared to LEACH and DDEEC.