摘要： 针对无线传感器网络寿命受节点能量制约的问题，提出基于节点生存时间的节能算法。根据节点接收、发送和处理数据后的剩余能量，给出节能算法中“轮”的概念，以已有阈值函数为基础进行改进，簇首选举利用改进阈值函数得到该簇最佳簇首节点，从而延长节点生存时间，使簇首以较低能耗延长其轮回周期。仿真结果表明，该算法能有效降低节点死亡速度，延长网络寿命。

关键词: 无线传感器网络, LEACH路由协议, 簇首, 阈值函数, 节点生存时间, 时间戳

Abstract: Because the lifetime of Wireless Sensor Network(WSN) is restricted by the energy of nodes, this paper presents an energy saving algorithm based on Node Survival Time(NST). According to the surplus energy after the node’s receiving, sending and processing data, the concept “wheel” of the energy saving algorithm is proposed. It improves on the basis of the existing threshold function and the cluster-head selection gets its best cluster head node by the improved threshold function so as to prolong the life time of the nodes and prolong the round cycle of the cluster nodes with lower energy consumption. Simulation results demonstrate that the algorithm is efficient for reducing dead speed of nodes and increasing the network lifetime.

Key words: Wireless Sensor Network(WSN), LEACH routing protocol, cluster head, threshold function, Node Survival Time(NST), Time Stamp(TS)

中图分类号: 

• TP393