摘要：

基于IEEE 1588时间同步的时间触发以太网(TTE)解决数据传输延迟的不确定性问题时,未考虑时间戳精度对IEEE 1588协议同步精度的影响。为此,建立一种频率漂移估计与偏差估计模型,计算时间戳精度对IEEE 1588协议同步精度的影响大小,并在理论上推导TTE协议时间同步与IEEE 1588协议时间同步的误差。实验结果表明,当时间戳精度达到0.1 μs或更高时,相对标准TTE时间同步算法,基于IEEE 1588协议的TTE网络具有更高的时间同步精度。

关键词: IEEE 1588协议, 时间同步, 时间触发以太网, 同步误差, 时间戳精度

Abstract:

Time-triggered Ethernet(TTE) based on time synchronization of IEEE 1588 solves the uncertainty problem of data transmission delay without considering the effect of timestamp accuracy on the synchronization accuracy of the IEEE 1588 protocol.To solve this problem,a frequency drift estimation and bias estimation model is established to calculate the impact of time stamp accuracy on the synchronization accuracy of the IEEE 1588 protocol,and the error of time synchronization between TTE protocol and the IEEE 1588 protocol is deduced theoretically.Experimental results show that the TTE network based on IEEE 1588 protocol has higher time synchronization accuracy than the standard TTE time synchronization algorithm when the timestamp accuracy reaches 0.1 μs or higher.

Key words: IEEE 1588 protocol, time synchronization, Time-triggered Ethernet(TTE), synchronization error, timestamp accuracy

中图分类号: 

• TP391