[SIPForum-discussion] media delay calculation

Juan M. López Soler juanma at ugr.es
Mon Jun 13 15:40:40 UTC 2011

Hi all,


You might use our VoIPTester tool  http://code.google.com/p/voiptester/


Best regards,



Juan M. Lopez-Soler 
Signal Theory, Telematics and Communications Dept. 
University of Granada 
C/ Periodista Daniel Saucedo Aranda s/n 
 <http://tstc.ugr.es/tl> http://tstc.ugr.es/tl







De: discussion-bounces at sipforum.org [mailto:discussion-bounces at sipforum.org]
En nombre de Umang
Enviado el: sábado, 11 de junio de 2011 19:04
Para: shweta jha
CC: discussion at sipforum.org
Asunto: Re: [SIPForum-discussion] media delay calculation


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.


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