ETSI TS 124 173 V14.3.0 (2019-01)

Universal Mobile Telecommunications System (UMTS); LTE; 5G; IMS Multimedia telephony communication service and supplementary services; Stage 3 (3GPP TS 24.173 version 14.3.0 Release 14)

ETSI TS 124 173 V14.3.0 (2019-01)

Name:ETSI TS 124 173 V14.3.0 (2019-01)   Standard name:Universal Mobile Telecommunications System (UMTS); LTE; 5G; IMS Multimedia telephony communication service and supplementary services; Stage 3 (3GPP TS 24.173 version 14.3.0 Release 14)
Standard number:ETSI TS 124 173 V14.3.0 (2019-01)   language:English language
Release Date:10-Jan-2019   technical committee:3GPP CT 1 - MM/CC/SM [lu] (formely CN1)
Drafting committee:   ICS number:
ETSI TS 124 173 V14.3.0 (2019-01)






TECHNICAL SPECIFICATION
Universal Mobile Telecommunications System (UMTS);
LTE;
5G;
IMS Multimedia telephony communication service and
supplementary services;
Stage 3
(3GPP TS 24.173 version 14.3.0 Release 14)

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3GPP TS 24.173 version 14.3.0 Release 14 1 ETSI TS 124 173 V14.3.0 (2019-01)



Reference
RTS/TSGC-0124173ve30
Keywords
5G,LTE,UMTS
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3GPP TS 24.173 version 14.3.0 Release 14 2 ETSI TS 124 173 V14.3.0 (2019-01)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (https://ipr.etsi.org/).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
Foreword
This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP).
The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or
GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables.
The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under
.
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI

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3GPP TS 24.173 version 14.3.0 Release 14 3 ETSI TS 124 173 V14.3.0 (2019-01)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 5
1 Scope . 6
2 References . 6
3 Definitions, symbols and abbreviations . 8
3.1 Definitions . 8
3.2 Abbreviations . 8
4 Overview of multimedia telephony communication service and associated supplementary services
in the IP Multimedia (IM) Core Network (CN) subsystem . 8
4.1 General . 8
4.1A Roles . 8
4.1A.1 Multimedia telephony participant . 8
4.1A.2 Multimedia telephony application server . 9
4.2 Overview of basic communication part . 9
4.3 Overview of supplementary services part . 9
5 Basic Communication . 10
5.1 IMS communication service identifier . 10
5.2 Session control procedures . 10
5.3 Interworking . 10
5.4 Call progress indications . 11
6 Supplementary services and enhancements. 11
6.1 High level requirements . 11
6.2 Originating Identification Presentation (OIP) . 11
6.3 Originating Identification Restriction (OIR) . 11
6.4 Terminating Identification Presentation (TIP). 11
6.5 Terminating Identification Restriction (TIR) . 11
6.6 Communication Diversion (CDIV) . 11
6.7 Communication Hold (HOLD). 11
6.8 Communication Barring (CB) . 11
6.9 Message Waiting Indication (MWI) . 11
6.10 Conference (CONF) . 11
6.11 Explicit Communication Transfer (ECT) . 11
6.12 XCAP over Ut interface for Manipulating NGN Services . 11
6.13 Advice Of Charge (AOC) . 11
6.14 Closed User Groups (CUG). 12
6.15 Three-Party (3PTY) . 12
6.16 Flexible Alerting (FA) . 12
6.17 Communication Waiting (CW) . 12
6.18 Completion of Communications to Busy Subscriber (CCBS) Completion of Communications by No
Reply (CCNR) . 12
6.19 Customized Alerting Tones (CAT) . 12
6.20 Customized Ringing Signal (CRS) . 12
6.21 Personal Network Management (PNM) . 12
6.22 Unstructured Supplementary Service Data (USSD) . 12
Annex A (informative): Void . 13
Annex B (informative): Void. . 13
Annex C (informative): Void . 13
ETSI

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3GPP TS 24.173 version 14.3.0 Release 14 4 ETSI TS 124 173 V14.3.0 (2019-01)
Annex D (informative): Void . 13
Annex E (informative): Void . 13
Annex F (informative): Void . 13
Annex G (informative): Void . 13
Annex H (informative): Void . 13
Annex I (informative): Void . 14
Annex J (normative): IP-Connectivity Access Network specific concepts when using EPS to
access IM CN subsystem . 14
J.1 Scope . 14
J.2 EPS aspects when connected to the IM CN subsystem . 14
J.2.1 Procedures at the UE . 14
J.2.1.1 Service Specific Access Control . 14
J.2.1.2 Smart Congestion Mitigation . 15
J.2.1.3 MMTEL request timeouts . 16
J.3 Application usage of SIP . 17
J.3.1 Procedures at the UE . 17
J.3.1.1 3GPP PS data off . 17
J.3.1.1.1 General . 17
J.3.1.1.2 Enforcement . 17
J.3.2 Procedures at the multimedia telephony application server . 19
J.3.2.1 3GPP PS data off . 19
Annex K (normative): IP-Connectivity Access Network specific concepts when using GPRS
to access IM CN subsystem . 20
K.1 Scope . 20
K.2 GPRS (Iu mode only) aspects when connected to the IM CN subsystem . 20
K.2.1 Procedures at the UE . 20
K.2.1.1 General . 20
K.2.1.2 Application specific Congestion control for Data Communication (ACDC) procedure. 20
K.3 Application usage of SIP . 21
K.3.1 Procedures at the UE . 21
K.3.1.1 3GPP PS data off . 21
K.3.1.1.1 General . 21
K.3.1.1.2 Enforcement . 21
K.3.2 Procedures at the multimedia telephony application server . 22
K.3.2.1 3GPP PS data off . 22
Annex L (normative): Timers . 23
Annex M(informative): Change history . 24
History . 27

ETSI

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3GPP TS 24.173 version 14.3.0 Release 14 5 ETSI TS 124 173 V14.3.0 (2019-01)
Foreword
rd
This Technical Specification has been produced by the 3 Generation Partnership Project (3GPP).
The contents of the present document are subject to continuing work within the TSG and may change following formal
TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an
identifying change of release date and an increase in version number as follows:
Version x.y.z
where:
x the first digit:
1 presented to TSG for information;
2 presented to TSG for approval;
3 or greater indicates TSG approved document under change control.
y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections,
updates, etc.
z the third digit is incremented when editorial only changes have been incorporated in the document.
ETSI

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3GPP TS 24.173 version 14.3.0 Release 14 6 ETSI TS 124 173 V14.3.0 (2019-01)
1 Scope
The present document provides the protocol details for multimedia telephony communication service and associated
supplementary services in the IP Multimedia (IM) Core Network (CN) subsystem based on the requirements from
3GPP TS 22.173 [2].
Multimedia telephony and supplementary services allow users to establish communications between them and enrich
that by enabling supplementary services.
2 References
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] 3GPP TR 21.905: "Vocabulary for 3GPP Specifications".
[2] 3GPP TS 22.173: "IP Multimedia Core Network Subsystem (IMS) Multimedia Telephony Service
and supplementary services; Stage 1".
[3] 3GPP TS 24.604: "Communication Diversion (CDIV); Protocol specification using IP Multimedia
(IM) Core Network (CN) subsystem; Protocol specification ".
[4] 3GPP TS 24.605: "Conference (CONF) using IP Multimedia (IM) Core Network (CN) subsystem;
Protocol specification".
[5] 3GPP TS 24.606: "Message Waiting Indication (MWI) using IP Multimedia (IM) Core Network
(CN) subsystem; Protocol specification".
[6] 3GPP TS 24.607: "Originating Identification Presentation (OIP) and Originating Identification
Restriction (OIR) using IP Multimedia (IM) Core Network (CN) subsystem; Protocol
specification".
[7] 3GPP TS 24.608: "Terminating Identification Presentation (TIP) and Terminating Identification
Restriction (TIR) using IP Multimedia (IM) Core Network (CN) subsystem; Protocol
specification".
[8] 3GPP TS 24.610: "Communication HOLD (HOLD) using IP Multimedia (IM) Core Network
(CN) subsystem; Protocol specification".
[9] 3GPP TS 24.611: "Anonymous Communication Rejection (ACR) and Communication Barring
(CB) using IP Multimedia (IM) Core Network (CN) subsystem; Protocol specification".
[10] 3GPP TS 24.629: "Explicit Communication Transfer (ECT) using IP Multimedia (IM) Core
Network (CN) subsystem; Protocol specification".
[11] 3GPP TS 24.623: "Extensible Markup Language (XML) Configuration Access Protocol (XCAP)
over the Ut interface for Manipulating Simulation Services".
[12] 3GPP TS 26.114: "IP Multimedia Subsystem (IMS); Multimedia telephony; Media handling and
interaction".
[13] 3GPP TS 24.229: "Internet Protocol (IP) multimedia call control protocol based on Session
Initiation Protocol (SIP) and Session Description Protocol (SDP); Stage 3".
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3GPP TS 24.173 version 14.3.0 Release 14 7 ETSI TS 124 173 V14.3.0 (2019-01)
[14] 3GPP TS 24.247: "Messaging using the IP Multimedia (IM) Core Network (CN) subsystem;
Stage 3".
[15] Void
[16] IETF RFC 3841 (August 2004): "Caller Preferences for the Session Initiation Protocol (SIP)".
[17] 3GPP TS 24.647: "Advice Of Charge (AOC) using IP Multimedia (IM)Core Network (CN)
subsystem; Protocol Specification".
[18] 3GPP TS 24.654: "Closed User Group (CUG) using IP Multimedia (IM) Core Network (CN)
subsystem, Protocol Specification".
[19] 3GPP TS 24.239: "IP Multimedia Subsystem (IMS) Flexible alerting supplementary service".
[20] 3GPP TS 24.238: "Session Initiation Protocol (SIP) based user configuration; stage 3".
[21] 3GPP2 C.S0055-A: "Packet Switched Video Telephony Services".
[22] ETSI TS 181 005: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); Service and Capability Requirements".
[23] 3GPP TS 24.615: "Communication Waiting (CW) using IP Multimedia (IM) Core Network (CN)
subsystem, Protocol Specification".
[24] 3GPP TS 24.642: "Completion of Communications to Busy Subscriber (CCBS) Completion of
Communications by No Reply (CCNR) using IP Multimedia (IM) Core Network (CN) subsystem;
Protocol specification".
[25] 3GPP TS 24.182: "IP Multimedia Subsystem (IMS) Customized Alerting Tones (CAT); Protocol
specification".
[26] 3GPP TS 36.331: "Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource
Control (RRC); Protocol specification".
[27] 3GPP TS 24.183: "IP Multimedia Subsystem (IMS) Customized Ringing Signal (CRS); Protocol
specification".
[28] IETF RFC 3362 (August 2002): "Real-time Facsimile (T.38) - image/t38 MIME Sub-type
Registration".
[29] 3GPP TS 24.259: "Personal Network Management (PNM); Stage 3".
[30] 3GPP TS 24.390: "Unstructured Supplementary Service Data (USSD) using IP Multimedia (IM)
Core Network (CN) subsystem IMS; Stage 3".
[31] IETF RFC 6809 (November 2012): "Mechanism to Indicate Support of Features and Capabilities
in the Session Initiation Protocol (SIP)".
[32] 3GPP TS 24.167: "3GPP IMS Management Object (MO); Stage 3".
[33] 3GPP TS 23.221: "Architectural requirements".
[34] Void.
[35] 3GPP TS 24.628: "Common Basic Communication procedures using IP Multimedia (IM) Core
Network (CN) subsystem; Protocol Specification".
[36] 3GPP TS 24.275: "Management Object (MO) for basic communication part of IMS multimedia
telephony (MMTEL) communication service".
[37] 3GPP TS 22.011: "Service accessibility".
[38] 3GPP TS 31.102: "Characteristics of the Universal Subscriber Identity Module (USIM)
application".
ETSI

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3GPP TS 24.173 version 14.3.0 Release 14 8 ETSI TS 124 173 V14.3.0 (2019-01)
3 Definitions, symbols and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in 3GPP TS 21.905 [1] apply.
MMTEL voice: a multimedia telephony communication session as described in subclause 5.2 with only audio or only
real-time text or only both audio and real-time text.
MMTEL video: a multimedia telephony communication session as described in subclause 5.2 with video.

For the purposes of the present document, the following terms and definitions given in 3GPP TS 22.011 [37] apply:
3GPP PS data off
3GPP PS data off exempt service

For the purposes of the present document, the following terms and definitions given in 3GPP TS 24.229 [13] apply:
3GPP PS data off status
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
CS Circuit Switched
CN Core Network
ICSI IMS Communication Service Identifier
IP Internet Protocol
IM IP Multimedia
MMTEL Multimedia Telephony
PS Packet Switched
UDP User Datagram Protocol
UDPTL UDP Transport Layer

4 Overview of multimedia telephony communication
service and associated supplementary services in
the IP Multimedia (IM) Core Network (CN) subsystem
4.1 General
In accordance with the service definition and requirements in 3GPP TS 22.173 [2], the IMS multimedia telephony
communication service specified herein allows multimedia conversational communication between two or more end
points. An end point is typically located in a UE, but can also be located in a network entity.
As for traditional circuit-switched telephony, the protocols for the IMS multimedia Telephony communication service
allow a user to connect to any other user, regardless of operator and access technology.
The IMS multimedia Telephony communication service consists of two principal parts: a basic communication part,
and an optional supplementary services part.
4.1A Roles
4.1A.1 Multimedia telephony participant
A UE shall implement the role of a multimedia telephony participant.
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3GPP TS 24.173 version 14.3.0 Release 14 9 ETSI TS 124 173 V14.3.0 (2019-01)
4.1A.2 Multimedia telephony application server
An application server shall implement the role of a multimedia telephony application server. Various application server
usages are called out by references to the various supplementary services, see subclause 4.3. It is an implementation
decision on how to allocate the functionality to one or more application servers.
4.2 Overview of basic communication part
The basic communication part of an IMS multimedia telephony communication service session is realised by a single
SIP session. It utilises media capabilities and flexibility provided by the SIP protocol and the 3GPP IMS specifications.
In accordance with the service definition in 3GPP TS 22.173 [2], media capabilities include RTP-based transfer of
voice, real-time video, real-time text and data, and UDPTL-based transfer of fax (IETF RFC 3362 [28]), as well as
TCP/MSRP-based transfer of text, arbitrary files and sharing of media files with predefined formats.
To ensure interoperability, media handling (including codecs and formats) is fully specified for RTP-based and MSRP-
based transfer in:
- 3GPP TS 26.114 [12] for 3GPP systems;
- 3GPP2 C.S0055-A [21] for 3GPP2 systems; and
- ETSI TS 181 005 [22] (codecs) and 3GPP TS 26.114 [12] (formats and other media handling) for fixed-
broadband accesses.
The service is highly dynamic in terms of media component usage: the protocols allow a communication session to start
with one or more media components, and components can then be added and/or removed during the communication
session. The protocols allow both one-way and two ways transfer between end points. Full duplex speech, and speech
combined with other media components, are typical media cases but the protocols do not mandate the use of speech in
all sessions.
4.3 Overview of supplementary services part
The supplementary services part of the IMS multimedia telephony communication service consists of a number of
specified supplementary services. These are fully standardized to ensure interoperability between multiple end points,
and between end points and network control entities. The behaviour of supplementary services is similar to
supplementary services specified for CS speech (TS 11). Supplementary services uses SIP as enabling protocol.
Configuration of supplementary services by the user should:
- take place over the Ut interface using XCAP as enabling protocol as described in 3GPP TS 24.623 [11]; or
- u
...

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