How to get TCP delay variation (jitter) - 未名空间MITBBS历史存档

国际科技财经博客移民网络热点娱乐民生时事公众号

Redian新闻

>未名空间

>CS - 计算机科学

How to get TCP delay variation (jitter)

How to get TCP delay variation (jitter)# CS - 计算机科学

p*r2005-04-25 07:04

1 楼

I think the TCP sequence of the data should be considered when calculating
TCP jitter. But when I googled, no paper mention about it.
Especailly in RFC 1889, it said: not necessarily in sequence
"The interarrival jitter is calculated continuously as each data
packet i is received from source SSRC_n, using this difference D for
that packet and the previous packet i-1 in order of arrival (not
necessarily in sequence), according to the formula.
"
Am I wrong?

s*t2005-04-25 07:04

2 楼

对于TCP应用来说，它们对jitter不敏感，所以讨论TCP的jitter我觉得没有
什么意义。
相比之下，多媒体应用对jitter很敏感，如果有的包来得快，有的包来得慢，
用户会看到很不舒服。所以，RFC 1889专门定义了针对RTP流的jitter公式。

【在 p*****r 的大作中提到】

: I think the TCP sequence of the data should be considered when calculating
: TCP jitter. But when I googled, no paper mention about it.
: Especailly in RFC 1889, it said: not necessarily in sequence
: "The interarrival jitter is calculated continuously as each data
: packet i is received from source SSRC_n, using this difference D for
: that packet and the previous packet i-1 in order of arrival (not
: necessarily in sequence), according to the formula.
: "
: Am I wrong?