摘要
研究能量长期有效的时间同步协议是成功部署生命力强的无线传感器网络的一项关键策略,对此,提出一种低能耗的多跳自适应时间同步算法MATS(Multi-Hop Adaptive Time Synchronization),该算法设计了一套灵活的机制来调整同步模式、全网重同步周期以及每对节点同步时的信标数,并且利用最大似然估计原理同时对节点的时钟偏移和频率偏移进行估计,达到用最小的能量损耗完成长期的、全网的时间同步的目的,最后通过数学分析和仿真的方法对所提出的改进算法进行了验证。
Researching the long-term effective energy time synchronization protocol is a key strategy for successful de- ployment of the vitality of wireless sensor networks. This proposes a low-power multi-hop adaptive time synchronization algorithm(the MATS:Multi-hop adaptive time synchronization). The algorithm designs a flexible mechanism to adjust the synchronization mode ,re-synchronization cycle, and each pair of node synchronization beacon number, and using the maximum likelihood estimation principle at the same time on the node clock offset and frequency offset estimate a- chieved with minimum energy loss to the completion of a long-term, network-wide time synchronization purposes. At last ,the improved algorithm is verified through mathematical analysis and simulation methods.
出处
《传感技术学报》
CAS
CSCD
北大核心
2013年第11期1557-1563,共7页
Chinese Journal of Sensors and Actuators
基金
重庆市科学技术委员会科技攻关项目(2009AC2068)
关键词
无线传感器网络
时间同步
重同步周期
最小能量损耗
time synchronization
wireless sensor network
heavy synchronization cycle
minimum energy loss