基于卡尔曼滤波的无线传感器网络时钟同步协议  

A time synchronization protocol for wireless sensor networks based on the Kalman filter

作　　者：郭文娟[1,2] 王英龙[1,2] 魏诺[1,3] 郭强[1,3] 周书旺[1,2,3] 

机构地区：[1]山东省计算中心,山东济南250000 [2]山东师范大学信息科学与工程学院,山东济南250014 [3]山东省计算机网络重点实验室,山东济南250014

出　　处：《山东大学学报（理学版）》2010年第11期32-36,共5页Journal of Shandong University(Natural Science)

基　　金：国家自然科学基金资助项目(60802030);山东省中青年科学家科研奖励基金资助项目(2007BSC01002);山东省科技攻关计划项目(2007GG2QT01007)

摘　　要：在本文提出的时钟同步协议中,节点依据所持能耗大小在有限通信区域内完成时钟同步,即高耗节点通过监听低耗节点间进行同步交互的TPSN同步信标实现Receiver-Only同步模式,并通过引用卡尔曼滤波方法优化同步节点的时钟偏差以降低同步误差率。实验仿真表明,该同步协议与TPSN同步法相比提高了同步精度。On the basis of the amount of power held, the sensor nodes can realize time synchronization in limited communication domains. Namely, according to monitoring TPSN synchronization beacons that is for synchronization exchanges between low-energy nodes, the high-energy nodes can achieve the Receiver-Only time synchronization mode. And through citing the Kalman filter method in this mode to optimize the synchronous node＇s clock deviation, the synchroni- zation error rate can be effectively decreased. Experimental simulation shows that this synchronization protocol, compared with the TPSN synchronization algorithms, greatly improves the synchronization accuracy.

关 键 词：无线传感器网络 时间同步 TPSN算法 卡尔曼滤波 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]