摘要
随着分散控制的发展和系统范围的扩大,通过网络联系的分散控制节点之间的时间同步技术变得越来越重要。同步技术相当于一个网络系统的心脏,它为该系统中的每个模块传送正确的时钟信号。分析了目前以太网应用中的3类时钟同步协议:IEEE 1588、NTP(网络时间协议)及SNTP(简单网络时间协议),具体说明了IEEE 1588、NTP及SNTP的基本原理,并对3类协议进行了简要的对比分析。
At present the system scale is unprecedentedly large in the developed countries, Time Synchronization Technology in the distributed control nodes of the network becomes more and more important when distributed control developes and system scale enlarges. Synchronization is the heart of one network system, it provides accurate clock signal for the modules in the system. This paper analyzes three time synchronization protocols in present ethernet, which are IEEE 1588, NTP and SNTP, and explains the basic theory of these protocols and makes simple comparison among them.
出处
《电子工程师》
2008年第9期47-50,共4页
Electronic Engineer
