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Content for  TR 23.811  Word version:  8.0.0

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0  Introductionp. 5

TS 23.204 specifies how to deliver SMS over generic 3GPP IP access, where the Short Message (SM) is entirely encapsulated in the SIP based messages so that the traditional SM not only can be delivered in CS, but also in IMS over different IP-CANs. However, the interworking between the Short Message and the Instant Messaging has not been defined yet, which prohibits the message interworking between the traditional SMS terminals and the non-SMS capable terminals.
As a result, there is an interest for supporting service level interworking for instance between Short Message (SM) and existing Instant Messaging (IM) services, which enables the communication between SMS terminals and the terminals that do not support the SMS, such as pure SIP terminals. This TR documents alternatives for how to provide such service level interworking.

1  Scopep. 6

This document contains the results of the study into the architectural requirements and comes up with the solution of the service level interworking for the Short Message service as defined in the TS 23.040 and Instant Messaging service as defined in OMA-TS-SIMPLE_IM-V1_20070816-C [8]. Considerations include overall requirements, architectural requirements, evaluation of potential architectural solutions and alternative architectures.
The objective is to identify an architectural solution that allows completely service level interworking between SMS and SIMPLE IM without degrading existing services, under the service requirements defined in the TS 22.340 and TS 22.105. In addition, how to charge for the interworked services shall be considered in this study as well.

2  Referencesp. 6

The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
  • References are either specific (identified by date of publication, edition number, version number, etc.) or non specific.
  • For a specific reference, subsequent revisions do not apply.
  • For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
TR 21.905: "Vocabulary for 3GPP Specifications".
TR 22.340: "IP Multimedia System (IMS) messaging".
TS 22.105: "Services and service capabilities".
TS 23.228: "IP Multimedia Subsystem (IMS); Stage 2".
TR 23.204: "Support of Short Message Service (SMS) over generic 3GPP Internet Protocol (IP) access".
TS 23.040: "Technical realization of the Short Message Service (SMS) Point to Point (PP)".
TS 24.011: "Point-to-Point (PP) Short Message Service (SMS) support on mobile radio interface".
OMA "Instant Messaging using SIMPLE", OMA-TS-SIMPLE_IM-V1_0-20070816-C, documents/
draft-ietf-simple-imdn-06:  "Instant Message Disposition Notification", 14 January 2008.
TS 24.247: "Messaging service using the IP Multimedia (IM) Core Network (CN) subsystem; Stage 3".
TS 24.229: "IP multimedia call control protocol based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP); Stage 3".
TS 24.341: "Support of SMS over IP networks; Stage 3".

3  Definitions and abbreviationsp. 7

3.1  Definitionsp. 7

For the purposes of the present document, the terms and definitions given in TR 21.905 and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905.
IMS origination:
origination of an Instant Message by an IMS UE.
IMS termination:
termination of an Instant Message by an IMS UE.
SMS origination:
origination of a Short Message (including SMS over IP) by an SMS capable UE, as defined in TS 23.040 and TS 23.204.
SMS termination:
termination of a Short Message (including SMS over IP) by an SMS capable UE, as defined in TS 23.040 and TS 23.204.
SIMPLE IM service:
the Instant Messaging Service as defined in the OMA-TS-SIMPLE_IM-V1_0-20070816-C [8].
the Short Message Service as defined in the TS 23.040
an immediate message as defined in TS 23.228, which encapsulates a SM in its text body.
Instant Message:
an Instant Message as defined in the OMA-TS-SIMPLE_IM-V1_0-20070816-C [8] and TS 24.247.
a UE which supports SMSIP MESSAGE.

3.2  Abbreviationsp. 7

For the purposes of the present document, the following abbreviations apply:

4  Overall requirementsp. 7

This document should consider in priority (but not being limited to) the following aspects:
  • providing a consistent service experience to the user when service-level interworking takes place;
  • providing requirements for suitable security mechanisms for interworked messages, for instance stop certain message from being interworked;
  • providing the service-level interworking authorisation;
  • avoiding overlap with OMA;
  • providing the appropriate mechanisms to apply charging principles for interworking;
  • considering the interaction with existing functionality specified in TS 23.040.

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