Liaison statement
LS on Service Identification

Submission date 2007-06-04
From 3GPP (Susanna Kooistra)
To The IETF (
Response contact
Purpose For action
Deadline 2007-09-11 Action Taken
Attachments (None)
3GPP TSG CT Plenary Meeting 36                                         

Busan, KOREA, 30th May – 1st June 2007

Title:            LS on Service Identification

Release:          Release 7

Work Item:        ServID


Source:            3GPP TSG CT

To:                IETF SIP WG, IETF SIPPING WG, IETF RAI Area

Cc:                3GPP TSG SA, 3GPP SA WG2, 3GPP SA WG5, 3GPP TSG CT


Contact Person:             

Name:               Hannu Hietalahti
Tel. Number:        +358 405021724

E-mail Address:

Attachments:             None.

1. Overall Description:

3GPP TSG CT would like to inform the relevant bodies in IETF of its
decision regarding the solution for Service Identification for IMS for
3GPP release 7. 3GPP TSG CT has approved change requests to its
relevant specifications that implement a solution that is dependent
upon the mechanisms defined in
draft-drage-sipping-service-identification-00 and

3GPP TSG CT would like to emphasize that the successful deployment of
IMS in release 7 is critically dependent on the early availability of a
stable solution for service identification and would like to take up
the offer of the RAI Area Directors to discuss how to expedite these
drafts in order to satisfy the schedule for the stabilization of 3GPP
release 7 which is already functionally frozen.

The requirements for Identification of IMS communication services are
defined in 3GPP TS 22.228 which can be located at and 3GPP TS 23.228
(primarily contained in clause 4.13), (which can be located at 3GPP TSG CT kindly
request that IETF take these requirements into account when completing
these drafts.

3GPP TSG CT looks forward to continued close cooperation between 3GPP
and IETF on the further development of IMS.

2. Actions:


ACTION:           3GPP TSG CT requests that the 3GPP IETF Liaison and
the RAI Area Directors, SIP and SIPPING WG chairs discuss and agree an
expedited schedule for the stabilisation and approval of these critical
3GPP dependencies from IETF that is agreeable to all parties and that
IETF progress work on these drafts with as high a priority as possible.

3GPP TSG CT is looking forward to the progress of this work and
requests a status update prior to the next TSG CT meeting in

3. Date of Next TSG-CT Meetings:

TSG-CT Meeting #37        12th – 14th September 2007         Riga,