基于精度分簇的无线传感器网络时间同步算法  

Clustering Based on Precision Time Synchronization Algorithm for Wireless Sensor Networks

作　　者：龙宏波[1] 叶晓慧[1] 谭思炜[1] 

机构地区：[1]海军工程大学电子工程学院,湖北武汉430033

出　　处：《计算机测量与控制》2010年第11期2684-2686,共3页Computer Measurement &Control

基　　金：湖北省自然科学基金项目资助(CGZ0696)

摘　　要：无线传感器网络时间同步的精度主要受同步跳数的影响,同步精度随同步跳数增大而降低;网络分簇采用分簇技术以实现尽可能延长网络的生存周期的目标;基于精度分簇的无线传感器网络时间同步算法结合了两个方面的因素;该算法以网络内节点不同的同步精度要求为基础,精度要求高的节点推选为簇首,保证簇首节点与基站的高精度单跳同步,同时在簇首与普通节点同步采用简单的单向报文同步方式以降低整个网络的同步功耗;通过仿真和分析得出该同步方法能保证精度要求,降低了同步开销和能耗,具有一定的应用价值。Time synchronization accuracy for Wireless Sensor Network（WSN）is affected by the number of hops.The greater hops is,the synchronization precision is more lower.The objectives using clustering technology is to achieve as much as possible to extend the network life cycle.Two factors is combined in clustering based on the precision time synchronization algorithm.Different node will require different time precision and the selection of the first cluster through accuracy requirements to ensure of high-precision synchronization,while cluster head nodes in sync with the regular node use a simple one-way to reduce power consumption.The algorithm and methods adopted in the system are practical and worthy of using abroad.

关 键 词：无线传感器网络 时间同步 分簇 精度 

分 类 号：TP393.01[自动化与计算机技术—计算机应用技术]