无线传感器网络时间同步技术进展

无线传感器网络是由大量部署在无线环境中的传感器设备构成的网络,无线节点间的协同操作要求网络节点维护共同的时间,时间同步是无线传感器网络支撑技术;针对传统分类方法中不能有效体现时间同步算法特点的问题,从信息交换是否存在反馈角度对现有时间同步算法进行了重新分类,同时对同步算法的进展情况作了详细描述;新的分类方法能够有效体现算法同步精度和同步能耗等特性:反馈式时间同步机制在同步精度和同步能耗上都要高于非反馈式时间同步机制;最后总结了现有时间同步算法的缺陷并展望了未来时间同步技术的发展方向。

Progress in Time Synchronization Technology for Wireless Sensor Networks

A wireless sensor network is a network composed of a large number of sensor devices deployed in a wireless environment. The cooperative operation between wireless nodes requires the network nodes to maintain a common time. The time synchronization is a wireless sensor network supporting technology,and the traditional classification method cannot effectively reflect the characteristics of time synchronization algorithm. The existing time synchronization algorithm is reclassified from the perspective of whether there is feedback in the information exchange. At the same time,the progress of the time synchronization algorithm is described in detail. The new classification method can effectively reflect the characteristics of synchronization precision and synchronization energy consumption of the algorithm. The feedback time synchronization mechanism is higher than the non-feedback time synchronization mechanism in synchronization accuracy and synchronization energy consumption. Finally,the shortcomings of the existing time synchronization algorithm are summarized and the future development direction of time synchronization technology is prospected.