用软件的方法进行单路网络延时的精确测量,需要解决两个端系统的时钟异步问题.现有的测量算法(如Ping和LPA)在测量精度和实时性方面存在着明显的不足.针对这些问题,本文提出一种双向的单路网络延时测量方法.新的延时测量算法对LPA算法进行了改进.实验结果表明,双向单路网络延时测量方法是一种十分有效的延时测量算法,特别适合于工程应用. In order to accurately measure the delay of a single network by means of software, it is necessary to solve the clock asynchronous problem of the two end systems. Existing measurement algorithms (such as Ping and LPA) have obvious shortcomings in measurement accuracy and real-time performance. For these problems, this paper presents a bi-directional single-network delay measurement method.The new delay measurement algorithm improves the LPA algorithm.The experimental results show that the delay measurement method is a very effective delay Measurement algorithm, especially suitable for engineering applications.