Liaison statement
LS on Service Identification

State Posted
Posted Date 2007-06-04
From Group 3GPP
From Contact Susanna Kooistra
To Group IETF
To Contacts
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 WG1, GSMA

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 September.

3. Date of Next TSG-CT Meetings:

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