3GPP TSG SA Plenary Meeting #17 SP-020627 9th - 12th September 2002. Biarritz, France. Title: Response to IETF LS on Interoperability Issues and SIP in IMS Response to: Liaison Statement on Interoperability Issues and SIP in IMS (NP-020393) To: IETF (statements@ietf.org) CC: CN, CN1, CN2, CN3, CN4, CN5, SA1, SA2, SA3, SA4, SA5 Source: 3GPP TSG SA Agenda item: 8.2 Document for: DECISION Contact Person: Name: Stephen Hayes Tel. Number: +1 469 360 8500 E-mail Address: Stephen.Hayes@ericsson.com Attachments: None 1. Overall Description: 3GPP thanks the IETF for the liaison titled "Liaison Statement on Interoperability I ssues and SIP in IMS". 3GPP generally supports the interoperability goals as stated in the liaison. Any changes to IMS must be done as part of the 3GPP process and must satisfy the market and regulatory requirements established for 3GPP systems. The 3GPP WGs have been requested to analyse the impacts of the specific interoperability issues identified in the liaison. Those fixes which can be accomplished by December without sacrificing crucial requirements will be corrected as part of Release 5. Those interoperability issues which cannot be quickly resolved as part of Release 5 (i.e., cannot be completed by December) will need further discussion. A primary requirement of 3GPP is to ensure backwards compatibility between releases (especially with respect to terminals). Therefore, it is proposed that 3GPP and IETF collaborate (perhaps by a workshop involving the relevant working groups in 3GPP and IETF) to address any remaining non-compliances after December. 2. Date of Next CN and SA meetings: TSGs#18 4th Dec. ? 12th Dec. 2002 New Orleans, USA