[SR-Users] How does rtpproxy handle handover?

[Daniel-Constantin Mierla]

Hello,

On 8/13/13 5:56 AM, Khoa Pham wrote:
>
> I have SIP proxy (Kamailio) works in conjunction with rtpproxy 
> <http://www.rtpproxy.org/> to support client communication. When SIP 
> proxy sends command to rtpproxy to create new session, rtpproxy will 
> create 2 ports (let's called them port1 and port2). rtpproxy has 1 
> listen interface
>
> Supposed A and B are 2 clients that use rtpproxy to relay RTP stream, 
> and works fine.
>
>     A <---> port1 [*rtpproxy*] port2 <---> B
>
> Now that A loses his current network, and enter network2 (imagine a 
> network handover) to become A2. In this case, I see rtpproxy still 
> works fine by relaying stream between A2 and B
>
>     A2 <---> port1 [*rtpproxy*] port2 <---> B
>
> But when A2 lose his network2 and enters network3 to become A3, 
> rtpproxy stills relay stream between A2 and B. It seems that A can 
> change his network only once.
>
>     A2 <---> port1 [*rtpproxy*] port2 <---> B
>
>     A3
>
> Why did the first handover succeed? How can I change rtpproxy behavior 
> to support many handovers ?
>
what I expect that happened between A and A2 is that the client 
application sent a re-INVITE with its new IP address. But then it didn't 
happen when going to A3. Rtpproxy itself can do nothing here. You should 
look at sip traffic to see what happens.

Cheers,
Daniel

-- 
Daniel-Constantin Mierla - http://www.asipto.com
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda

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