摘要
现如今,各领域对时间统一系统的性能要求越来越高。以往的时间统一系统大多使用网络时间协议(Network Time Protocol, NTP)进行授时,但该协议只能提供毫秒级的同步精度,且主时钟一般为固定不变的,无法满足测控等应用领域的高精度、高鲁棒性的要求。基于此,对基于IEEE1588标准(Precision Time Protocol,PTP)授时的高可靠时间统一系统的应用进行了深入研究。本系统采用PTP协议进行授时,可使系统时间同步精度达到纳秒级,并以最佳主时钟算法(Best Master Clock,BMC)为理论基础,设计并实现手动设置与自动选择两种模式的双机热备功能,满足了测控等应用领域对时间统一系统的高性能要求。相比较以往的时间统一系统,本系统大大提升了系统的授时精度与鲁棒性。
Nowadays, the performance requirements of time unified system in various fields are getting higher and higher. In the past, most time unified system used NTP for time synchronization, but the protocol can only provide millisecond-level synchronization accuracy, and the master clock is generally fixed, which cannot meet the requirements of high precision and high robustness in application fields such as measurement and control. Based on this, this paper conducts an in-depth study on the application of high-reliability time unified system based on PTP timing. The system adopts the PTP protocol for tim-ing, which can make the system time synchronization precision reach nanosecond level, and based on the BMC algorithm, the system is designed and implemented the double mode of manual setting and automatic selection for the dual-system hot stand-by function, which satisfies the high-performance requirements of the time unified system in the application fields such as measurement and control. Compared with the previous time unified system, the system greatly improves the timing accuracy and robustness of time unified system.
作者
马昭
葛文双
胡爱兰
张瑞权
张志成
Ma Zhao;Ge Wenshuang;Hu Ailan;Zhang Ruiquan;Zhang Zhicheng(National Computer System Engineering Research Institute of China,Beijing 100083,China)
出处
《电子技术应用》
2019年第5期38-42,共5页
Application of Electronic Technique
关键词
高精度授时
PTP
双机热备
时间统一系统
测控
high precision timing
PTP
dual-system hot standby
time unified system
measurement and control
