Abstract: Synchronization is a difficulty in performance testing. Previous tests use round-trip delay to avoid the synchronization problem, but the jitter error can not be neglected. So precise testing one-way delay is very important. The paper provides a way, using round-trip delay to compute one-way delay, through transmitting and accepting delay. Based on this method, it tests a real multimedia network.

Key words: one-way delay, round-trip delay, jitter, packet loss rate, throughput

摘要： 时间同步是测试中的一个难点，现有的测试方法大多都是测试往返时延，以避开时间同步，但得到的抖动误差很大，所以对单向时延的精确测量是获取网络抖动的前提。该文通过测试发送端和接收端的往返时延，结合RTP协议和数学公式的推导，给出通过测得的往返时延计算出单向时延的方法，并对实际的多媒体网络性能进行了测试。

关键词: 单向时延, 往返时延, 抖动, 丢包率, 吞吐量

CLC Number: 

• TN91