精确时钟协议的最优主时钟算法

Best Master Clock Algorithm of Precision Time Protocol

IEEE1588标准是测量和控制领域的精确时钟同步协议,通过控制网络同步全系统设备的时钟。在不需要太多资源的情况下,能达到高精度的时钟同步;该协议规定了系统内只有一个主时钟,其他的设备的时钟都要和该主时钟同步,因此主时钟的选择好坏对于时钟的同步精度至关重要;文中研究了最优主时钟的算法思想、原理和组成,设计了实现最优主时钟算法的功能模块和方法,并使用测试系统对模块的功能进行了相应的仿真测试;实验结果表明,设计的功能模块能够轻松的选择到系统的最优主时钟,验证了最优主时钟算法的可行性和有效性,为精确时钟同步协议的进一步应用奠定了基础。

IEEE1588 standard is precision clock synchronization protocol of the measurement and control fields which synchronizes clock of the whole system equipments by control network. It can achieve high-- precision clock synchronization in the case of not too many re- sources. The agreement provides for only one master clock within the system, other equipment clock must be synchronized with the master clock, so the choice of master clock quality is essential for precision clock synchronization. This paper studied best master clock algorithm ide- ology, theory and composition, designed a function modules and methods for best master clock algorithm, and maked a corresponding simula- tion tests to the module function using test system. Experimental results showed that the designed functional modules can easily select the best master clock of the system, proved the feasibility and effectiveness of the best master clock algorithm. It is a basis of the further appli- cation for precision clock synchronization protocol.