Content for TR 23.700-75 Word version: 19.0.0

1 Scope p. 7

The scope of this Technical Report is to study solutions addressing MPS priority for SMS and MPS priority for messaging services based on IMS within the 3GPP system. For IMS, the scope is limited to MPS priority by the 3GPP system when SIP is used to support the messaging service.

The study will investigate the following aspects:

Solutions addressing how MPS for messaging services is requested and authorized using a UE with a subscription for MPS.
Solutions addressing gaps for MPS priority treatment for messaging services using TS 23.228 specified SIP MESSAGE and SIP sessions in EPC and 5GC.
Solutions addressing gaps for MPS priority treatment in EPC and 5GC for messaging services using MO/MT SMS over IP, and MO/MT SMS over NAS. For SMS, only subscription-based priority treatment is in scope.

2 References p. 7

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.

[1]

TR 21.905: "Vocabulary for 3GPP Specifications".

[2]

TS 23.040: "Technical realization of the Short Message Service (SMS)".

[3]

TS 23.204: "Support of Short Message Service (SMS) over generic 3GPP Internet Protocol (IP) access; Stage 2".

[4]

TS 23.228: "IP Multimedia Subsystem (IMS); Stage 2".

[5]

TS 23.272: "Circuit Switched (CS) fallback in Evolved Packet System (EPS); Stage 2".

[6]

TS 23.401: "General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access".

[7]

TS 23.501: "System architecture for the 5G System (5GS); Stage 2".

[8]

TS 23.502: "Procedures for the 5G System (5GS); Stage 2".

[9]

TS 23.540: "5G System: Technical realization of Service Based Short Message Service; Stage 2".

[10]

TS 23.632: "User data interworking, coexistence and migration, Stage 2".

[11]

TS 29.122: "T8 reference point for Northbound APIs".

[12]

TS 29.336: "Home Subscriber Server (HSS) diameter interfaces for interworking with packet data networks and applications".

[13]

TS 29.503: "5G System; Unified Data Management Services; Stage 3".

[14]

TS 23.503: "Policy and charging control framework for the 5G System (5GS); Stage 2".

3 Definitions of terms and abbreviations p. 8

3.1 Terms p. 8

For the purposes of the present document, the terms 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.

MPS for messaging service:

Any of the following network supported messaging technologies delivered with MPS priority: SMS over NAS, SMS over IP, and IMS Immediate Messaging and IMS Session-based Messaging as defined in TS 23.228.

3.2 Abbreviations p. 8

For the purposes of the present document, the abbreviations given in TR 21.905 and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905.

DRMP

Diameter Routing Message Priority

DTS

Data Transport Service

MPS

Multimedia Priority Service

4 Architectural Assumptions and Requirements p. 8

Solutions shall build on the EPS, 5GS, and IMS architectures as in TS 23.204, TS 23.228, TS 23.401, TS 23.501, TS 23.502, TS 23.040, Annex C of TS 23.272, TS 23.540.
Solutions for MPS priority for messaging via WLAN are based on existing MPS support for Non-3GPP WLAN.
MPS priority treatment for SMS over NAS and SMS over IP requires an MPS subscription and MPS for messaging enabled.