一种新的提高互联网端到端时延精度的测量方法

由于端到端网络时延的测量中存在收发时钟不同步的问题,在测量中大多是通过测往返时延来间接求得端到端时延,测试结果误差较大.本文利用主动探测方法,在互联网上通过在一端发送带有时间戳的IP数据包,在另一端记录该测量分组的到达时间戳来获得端到端的时延测量值,然后利用线性规划的方法来消除了收发时钟的初始相位差和相对频差等影响,计算出网络的端到端时延真实值.通过实例测试,结果表明该方法消除了时钟不同步带来的误差,提高了测试结果的精确度.

A Novel Method for Improving the Precision in Internet End-to-End Delay Measurements

The clock of the sending endpoint is always nonsynchronous with that of the receiving one in Internet end-to-end delay measurement, so the delay is usually obtained indirectly by measuring the round-trip delay time, but the result is quite inaccurate. We propose a novel method to measure the Internet end-to-end delay directly. First this paper describes an active measurement method to get the time difference between the time a sending endpoint sends an IP packet and the time a receiving endpoint receives th...