Packet loss / Jitter / Latency issues - sr-users

2 Feb 2014

Dear Daniel and Kamailio'ns

Greetings,

I am working on kamailio server (4.0.x),whicch is integreted with
media-proxy server (2.5.2) and it is all working fine in the point of SIP
functionality.

And i have a set-up like this below, with this when the calls (audio/video)
sessions started i am experiencing  latency,jitter, echo's in audio calls
and a choppy ,pixelled video :

KAMAILIO

|
                                Android SIP client (IMSDroid) ---- Wi-Fi
router ---- Switch (level 2) ---- Wi-Fi router ---- Android SIP client
(IMSDroid)

(Total set-up runs on Intranet infrastructure).

When i call between two SIP clients, Calls are getting established
successfully and RTP flow is also relaying using Media-proxy server. But
the audio/video performnce is not good enough. I am experiencing all this
Latency , jitter , Choppy pixelled video.

How can i resolve all this issues? What could be the problem ?

Ofcourse SIP proxy is not responsible all this problems (as i know ), But
is there anything  can be done on Media-proxy server ? Or anything Buffer
settings can be done on Kamailio server side (or anything else) ?
Even i changed Shared memory and Package memories to 512MB and 16MB
respectively.

Anybody can guess what may be the problems that causes these issues ?

PS: When i tried 'ping' Clients IP addresses in Kamailio server PC, there
is 20-30% packet loss also.

Please help me in resolving these issues.

Any help will greatly appreciate.

Regards,
Ravi.