无线传感器网络延迟层次型时间同步算法  

DHTS:Delayed-Hirerarchical Time Synchronization in Wireless Sensor Network

作　　者：黄成芳[1] 何迪[1] 

机构地区：[1]上海交通大学电子工程系,上海200240

出　　处：《计算机仿真》2008年第10期157-160,共4页Computer Simulation

基　　金：上海市科委重大科技攻关项目(05dz15004)

摘　　要：时间同步在无线传感器网络的许多应用和协议中都有重要的作用,提高同步精度和降低能量消耗是无线传感器网络时间同步算法考虑的两个重要指标。为了改善中小型网络的时间同步性能,针对成簇的网络结构,提出一种基于分簇的延迟层次型时间同步算法(DHTS),建立系统模型并应用DHTS算法,分析了模型拓扑结构和算法同步误差。模拟结果表明,与传统算法相比,DHTS使所有的节点都得到了有效同步,能够在保证网络同步精度的前提下有效降低数据传输所需能量,并且能方便地应用于现实的无线传感器网络。Time synchronization is important for many applications and protocols in Wireless Sensor Networks （WSN） ,improving synchronization precision and reducing energy consumption are the two important aspects consid- ering time synchronization in WSN. In order to improve the performance of time synchronization in small and medium - size networks, this paper presents a Cluster - based Delayed - Hirerarchical Time Synchronization （DHTS） protocol, the topology of which matches the cluster - based network architecture in the real world. The system model is built first and the DHTS protocol is applied to it. The topology of the model and the synchronization error are demonstrated in detail. By applying this algorithm, all the nodes in the network can be synchronized efficiently to each other. The simulation results show that the DHTS provides power efficiency as well as the required synchronization error. It can be easily applied in the real WSN.

关 键 词：无线传感器网络 时间同步 分簇 

分 类 号：TN925[电子电信—通信与信息系统] TP212[电子电信—信息与通信工程]