摘要： 针对网络时间协议的同步过程存在较大网络误差的问题，通过实验数据对网络时间协议的误差范围进行量化分析，提出如何从时间服务器中选取更精确时间戳的方法，从而提高网络校时的准确度。实际测量结果表明，在网络延迟方面，二级时间服务器要优于一级时间服务器。该方法为选择最优时间服务器奠定了理论基础。

关键词: 时间服务器, 时间戳, 时间同步, 网络时间协议

Abstract: According to errors of Network Time Protocol(NTP) in the synchronous process, this paper makes a quantitative analysis of the range of these errors through test data and experimental results, and proposes how to select more precise timestamp among timeservers, improves the accurate of network correcting time. Practical measurements result shows that secondary time server are better than primary ones from the perspectives of network delay. This method lays a theoretical foundation for selection of the optimal time server.

Key words: time server, time stamp, time synchronization, Network Time Protocol(NTP)

中图分类号: 

• TP393