互联网上的时间基准

Time Standard In Internet

简要介绍了NTP的基本框架及相应算法。在NTP的过滤算法中使用了PLL算法,给出了基于PLL的算法框架,该算法利用Allan方差作工具将测量值中的网络延迟和钟漂移分离。最后介绍了对等点选择算法,提出我国建立同步网的设想。

This paper briefly introduces the main frame and relating algorithm of NTP.In NTP's data filter algorithm the PLL algorithm are used,which utilize Allan variance as tool to separate the network delay and the clock deviance,and also gives the final hierarchical architecture of the algorithm.At last,it introduces the peer-selection algorithm,and con-ceives to build the synchronous network in the country.