[Sip-implementors] When does "Re-INVITE" take effect ?

hspark Wed, 23 Jul 2003 16:51:38 -0700

Title: 메시지

Hello,

If IP/port in SDP changes, when does "Re-INVITE" take effect ?

from Sip-Implementors mail archive

http://lists.cs.columbia.edu/pipermail/sip-implementors/2001-May/001211.html

from RFC3312

Integration of Resource Management and Session Initiation Protocol (SIP)

13. 1 End-to-End Status Type

http://www.zvon.org/tmRFC/RFC3312/Output/chapter13.html

from RFC3264

An Offer/Answer Model Session Description Protocol

8.3.1 Modifying Address, Port or Transport

http://www.zvon.org/tmRFC/RFC3264/Output/chapter8.html

Alice Proxy 2 Bob

| Both Way RTP Media Established |

|<=======================================>|

| |

| Bob changes IP address |

| |

| F9 INVITE |

|<----------------------------------------|

| F10 200 OK |

|---------------------------------------->|

| F11 ACK |

|<----------------------------------------|

| New RTP Media Stream |

|<=======================================>|

1) In above flows,

Alice may continue sending media to Bob's old address during "Re-INVITE".

Alice may start sending media to Bob's new address

before sending 200 OK, if "Re-INVITE" is accepted by Alice.

Bob may continue sending media to Alice during "Re-INVITE" ?

Am I right ?

2) If RTCP timeout occurs on Alice and there is no active media session with Bob,

does Alice terminate SIP session with Bob ?

3) If Bob sends RTCP with new SSRC and new address before "Re-INVITE" is accepted by Alice,

is there any problem in that ?

Thanks in advance.

Brad Park

_______________________________________________
Sip-implementors mailing list
[EMAIL PROTECTED]
http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors

[Sip-implementors] When does "Re-INVITE" take effect ?

Reply via email to