摘要
考虑无线链路的非对称传播时延、中间节点的转发时延以及从节点的时钟源计时误差因素,提出一种全新的基于IEEE 1588协议的多跳无线网络时间同步方法.该时间同步方法首先建立主从时钟之间的时钟偏移以及时钟偏移率的状态空间模型,然后基于此状态空间模型,利用Kalman滤波方法对从节点的时间进行估计.仿真结果表明,本文的时间同步方法与现有工作相比具有更高的同步精度.
Considering the asymmetric propagation delays of wireless links, the forwarding delays of intermediate nodes, and the timing error of the clock of slave nodes, this paper presents a novel IEEE 1588 protocol-based time synchronization method for multi-hop wireless networks. We first build state-space models of the time offset and the time offset skew between the master clock and the slave clocks. Then, based on the formulated state space models, we estimate the clock of the slave nodes using a Kalman filter. The simulation results obtained show that the proposed method yields higher synchronization precision than existing works.
出处
《中国科学：信息科学》
CSCD
北大核心
2016年第6期777-788,共12页
Scientia Sinica(Informationis)
基金
中国科学院战略性先导科技专项(批准号:XDA06020500)资助
