Research on High-accuracy Clock Synchronization Based on IEEE 1588 Protocol
Feilong Shan, Jianguo Yu, Junguo Dong, Xin Chang, Zhen Yu · 2019
With the continuous development of mobile Internet3G/4G/5G, the requirement of time synchronization is becoming higher and higher. The IEEE1588 protocol has received extensive attention and research because it can provide sub-microsecond time synchronization to meet the actual needs. This research is based on Kalman Filter(KF) and Sliding Mode Controller(SMC) to achieve master-slave clock synchronization. Firstly, SMC is used to compensate the frequency drift caused by temperature, thereby reducing the influence of temperature on the frequency drift of crystal oscillator. Then, KF is used to suppress and optimize clock frequency jitter or random error. Through simulation, it is proved that this method can effectively improve the synchronization accuracy and meet the clock synchronization requirements of IEEE1588 protocol.