[SIPForum-discussion] media delay calculation

Umang umang2382 at gmail.com
Sat Jun 11 17:04:21 UTC 2011

If there is no qos in your network..you can just use ping RTT/2.

If there is qos (or if you don't know); do a tcpdump on the sender & another
(at the same time) on the receiver; then match up the rtp between the two
tcpdumps (using sequence numbers).  When you have correctly matched them,
compare the time of the transmission from A vs the time of receipt @ B.
This is a little tedious, but you can create a script...I use matlab
wireshark extension.

On Fri, Jun 10, 2011 at 2:29 PM, shweta jha <shwetajha77 at yahoo.com> wrote:

> Hi all,
> I am in need to calculate average travel time rtp media takes from android
> mobile handset A to android mobile handset B. I am only interested in
> network travel times which means time interval between media sent out from
> transport layer of handset A and media received by transport layer of
> handset B ( after receiving rtp packet jitter delay will get added to that
> ).
> Or how to calculate media delay when Media Gateway sends out media and
> handset receives media , network travel time between these two entities.
> I do not want to use RTCP RR report as RTCP RR transmission is
> optional.Handset might not always receive RTCP RR report.
> Thanks,
> pinku
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