IEEE 802.1AS clock synchronization algorithm based on Kalman filtering

Clock synchronization accuracy refers to the accuracy of clock synchronization achieved through various clock synchronization protocols and techniques. In practical applications, the clock deviation problem is inevitable. For IEEE802.1AS clock synchronization process of the common clock deviation problem, a Kalman filter-based clock synchronization optimization algorithm is proposed. First, according to the signal transmission recurrence relationship between master and slave clocks to establish the clock model; then based on the master clock and slave clock one-way message transmission to establish the observation model, while the existence of deviation of the clock signal processing; finally based on the optimized Kalman filter algorithm for clock deviation problem optimization. Experimental results show that the algorithm can to a certain extent eliminate the impact of the instability of the slave clock on the clock synchronization, so as to achieve high precision synchronization of the clock. Compared with the traditional IEEEE1588 protocol synchronization method, the method proposed in this paper has higher accuracy, lower latency, better stability and wider application range.