Liaison statement
LS on offer/answer procedures
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State | Posted |
---|---|
Submitted Date | 2008-04-21 |
From Group | 3GPP |
From Contact | Susanna Kooistra |
To Groups | mmusic, sipping |
To Contacts | gonzalo.camarillo@ericsson.com jf.mule@cablelabs.com |
Cc | hannu.hietalahti@nokia.com |
Purpose | For action |
Deadline | 2008-05-09 Action Taken |
Attachments | LS on offer/answer procedures |
Body |
3GPP TSG CT WG1 Meeting #52 C1-081428 Jeju Island, KOREA, 7th – 11th April 2008 Title: LS on offer/answer procedures Response to: - Release: - Work Item: - Source: CT1 To: IETF SIPPING WG Cc: IETF MMUSIC WG Cc: 3GPP/IETF and 3GPP/ITU-T Co-ordinator Hannu HIETALAHTI (3GPP TSG CT Chair (hannu.hietalahti@nokia.com) Contact Person: Name: Christer HOLMBERG E-mail Address: christer.holmberg@ericsson.com Attachments: None 1. Overall Description: 3GPP CT1 has discussed the "Commit/Rollback of Offer/Answer on Unsuccessful re-INVITE Transaction" issue in draft-ietf-sipping-sip-offeranswer-06.txt. A typical example of where subsequent offer/answer transactions may take place before a final answer to the re-INVITE request is received is when new media streams are added during an ongoing session, and those media streams require pre-condition procedures due to network/radio resource reasons. CT1 has identified the importance of a solution to the matter, in order to specify and implement interoperable procedures, and to avoid SDP state misalignments in cases where re-INVITE requests are rejected. CT1 aims to be able to find a solution to the issue within the 3GPP Release 8 timeframe, which is scheduled to be frozen in December 2008. 2. Actions: To IETF SIPPING WG ACTION: CT1 asks SIPPING to take the importance of the issue into considerations in their work, and to provide guidance how to proceed on the matter. 3. Date of Next CT1 Meetings: TITLE DATES LOCATION CTRY 3GPPCT1#52 7 - 11 Apr 2008 Jeju Island KR 3GPPCT1#53 5 - 9 May 2008 Cape Town ZA 3GPPCT1#54 23 - 27 Jun 2008 Zagreb HR 3GPPCT1#55 18 - 22 Aug 2008 Budapest HU 3GPPCT1#56 10 - 14 Nov 2008 Shanghai CN |