A Precision Adaptive Average Time Synchronization Protocol in Wireless Sensor Networks

摘要：

Time synchronization provides an essential service for wireless sensor networks.Most of previous works focus on improving synchronization accuracy.However,other design concerns,such as global time continuity,power ef .ciency and adaptability,arise from real applications requirements and receive more and more attentions.During synchronization, most of approaches choose a speci .c sensor node s (denoted as leader node)local time to be the global time,which would be disturbed easily due to network dynamics (leader node s re-elections or power down).The disorder global time reference could confuse other sensor nodes and even crash applications based on temporal sequence relationship.This paper .rst present an average based time synchronization algorithm,which can provide continuous global time in cluster with similar synchronization precision during leader re- elections.Furthermore,in order to meet power ef .ciency and adaptability requirements from applications,a self measure and query based adaptive mechanism is integrated into it to adjust synchronization period dynamically.Compared with previous adaptive algorithms,the query table method provides one-step convergence while satisfying synchronization error tolerance.

关键词： Sensor networks Adaptive time synchroniza-tion Power consumption

作者: Li Li Yongpan Liu Huazhong Yang Hui Wang

作者单位: Department of Electronic Engineering Tsinghua University Beijing,100084,P.R.China

会议类型: 国际会议

会议名称: 2008 IEEE International Conference on Onformation and Automation(IEEE 信息与自动化国际会议)

会议地点: 张家界

会议语种:英文

页码: 65-70

在线出版日期: 2008-06-20（万方平台首次上网日期，不代表论文的发表时间）