1、 ETSI TR 124 980 V14.0.0 (2017-04) LTE; Minimum requirements for support of Mission Critical Push To Talk (MCPTT) service over the Gm reference point (3GPP TR 24.980 version 14.0.0 Release 14) TECHNICAL REPORT ETSI ETSI TR 124 980 V14.0.0 (2017-04)13GPP TR 24.980 version 14.0.0 Release 14Reference R
2、TR/TSGC-0124980ve00 Keywords LTE ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice The present do
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7、dified without the written authorization of ETSI. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2017. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are Trade Marks of ETSI registered for the benefi
8、t of its Members. 3GPPTM and LTE are Trade Marks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM and the GSM logo are Trade Marks registered and owned by the GSM Association. ETSI ETSI TR 124 980 V14.0.0 (2017-04)23GPP TR 24.980 version 14.0.0 Release 1
9、4Intellectual Property Rights IPRs essential or potentially essential to the present document 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 Propert
10、y 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 search
11、es, 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. Foreword This Technical Report (TR) has been produced by ETS
12、I 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,
13、UMTS, 3GPP and ETSI identities can be found under http:/webapp.etsi.org/key/queryform.asp. Modal verbs terminology In the present document “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 (Ve
14、rbal forms for the expression of provisions). “must“ and “must not“ are NOT allowed in ETSI deliverables except when used in direct citation. ETSI ETSI TR 124 980 V14.0.0 (2017-04)33GPP TR 24.980 version 14.0.0 Release 14Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology
15、2g3Foreword . 5g3Introduction 5g31 Scope 6g32 References 6g33 Definitions, symbols and abbreviations . 7g33.1 Definitions 7g33.2 Abbreviations . 7g34 Support of generic functions over the Gm reference point 7g34.1 General . 7g34.1.1 MCPTT UE . 7g34.1.2 SIP core. 8g34.1.3 EPC. 8g34.2 Registration pro
16、cedures 8g34.2.1 MCPTT UE . 8g34.2.2 SIP core . 8g34.3 Authentication procedures 8g34.3.1 MCPTT UE. 8g34.3.2 SIP core . 8g34.4 Session establishment procedures 8g34.4.1 General 8g34.5 Integration of resource management and SIP . 8g34.5.1 MCPTT UE . 8g34.5.1.1 Loss of PDN connectivity . 8g34.5.1.2 Lo
17、ss of media bearer and Radio Connection . 9g34.5.2 SIP core. 9g34.5.2.1 Loss of PDN connectivity . 9g34.5.2.2 Loss of media bearer and Radio Connection . 9g35 RTP and SDP considerations to support MCPTT over the Gm reference point 9g35.1 General . 9g35.1.1 MCPTT UE . 9g35.1.2 SIP core. 9g35.2 Data t
18、ransport . 10g35.2.1 MCPTT UE . 10g35.2.2 SIP core. 10g35.3 RTCP usage 10g35.3.1 General 10g36 Bearer management 10g36.1 General . 10g36.1.1 MCPTT UE . 10g36.2 EPS bearer considerations for SIP signalling and MCPTT sessions 10g36.2.1 MCPTT UE . 10g36.2.2 EPS . 10g36.3 P-CSCF discovery 11g36.3.1 MCPT
19、T UE . 11g36.3.2 SIP core. 11g36.3.3 EPC. 11g37 Common functionalities . 11g37.1 IP version 11g3ETSI ETSI TR 124 980 V14.0.0 (2017-04)43GPP TR 24.980 version 14.0.0 Release 147.1.1 MCPTT UE . 11g37.1.2 SIP core. 12g3Annex A: Change history 13g3History 14g3ETSI ETSI TR 124 980 V14.0.0 (2017-04)53GPP
20、TR 24.980 version 14.0.0 Release 14Foreword This Technical Report has been produced by the 3rdGeneration 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
21、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 u
22、nder 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. Introduction 3GPP TS 23.179 2 defines that the SIP-1 refer
23、ence point between the MCPTT UE and the SIP core uses the 3GPP Gm reference point (with necessary enhancements to support MCPTT requirements and profiled to meet the minimum requirements for support of MCPTT). 3GPP TS 24.229 4 and 3GPP TS 24.301 5 contain several options or alternatives for the MCPT
24、T UE and network for support of procedures on the Gm reference point in order to obtain IMS services. In order to ensure interoperability it is necessary to define recommendations that if adhered to by both MCPTT UE and network will ensure that the MCPTT UE can obtain access to the MCPTT service. Th
25、e present document makes recommendations for the P-CSCF and S-CSCF entities defined in 3GPP TS 23.228 6, however if the SIP core for MCPTT does not internally comply with the architecture of 3GPP TS 23.228 6 these recommendations apply generically to whatever SIP core entity provides the equivalent
26、functionality to the P-CCSF and S-CSCF. The MCPTT UE and SIP core adhere to the procedures on the Gm reference point defined in 3GPP TS 24.229 4, 3GPP TS 24.301 5 and 3GPP TS 24.379 3. The present document cross-references and aligns with GSMA PRD IR.92 12, which profiles Voice and SMS over LTE (VoL
27、TE). ETSI ETSI TR 124 980 V14.0.0 (2017-04)63GPP TR 24.980 version 14.0.0 Release 141 Scope The present document describes a minimum IMS profile of the Gm reference point for SIP core implementation to guide interoperable implementation of MCPTT solutions. In order to support procedures over the SIP
28、-1 reference point defined in 3GPP TS 23.179 2 and 3GPP TS 24.379 3, and which exists between the MCPTT UE Signaling User Agent and the SIP core for obtaining access to MCPTT service and supporting MCPTT sessions, the Gm reference point is profiled to meet the minimum requirements to support MCPTT.
29、The Gm reference point contains many options which are not necessarily applicable for support of MCPTT or options which are alternative mechanisms (e.g. P-CSCF discovery) where if the same option is not supported by both the MCPTT UE and the network interoperability cannot be achieved. The present d
30、ocument describes the following: - Where options exist in 3GPP TS 24.229 4 related to provision of IMS based services over the Gm reference point, those options which need to be supported to ensure interoperable MCPTT service will be identified. - Where options exist in 3GPP TS 24.301 5 and stage 2
31、functionality that are needed to provide MCPTT service over IMS, those options which need to be supported to ensure interoperable MCPTT service will be identified. - Where optional features of MCPTT are defined that require additional options on the Gm reference point to be supported, these options
32、will also be identified as recommended to be supported to ensure interoperability of the optional feature. The present document will only cover on-network unicast operation. The present document covers EPC aspects that are required by MCPTT to establish MCPTT sessions. 2 References The following doc
33、uments 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. -
34、 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 S
35、pecifications“. 2 3GPP TS 23.179: “Functional architecture and information flows to support mission critical communication; Stage 2“. 3 3GPP TS 24.379: “Mission Critical Push To Talk (MCPTT) call control protocol specification“. 4 3GPP TS 24.229: “IP multimedia call control protocol based on Session
36、 Initiation Protocol (SIP) and Session Description Protocol (SDP); Stage 3“. 5 3GPP TS 24.301: “Non-Access-Stratum (NAS) protocol for Evolved Packet System (EPS); Stage 3“. 6 3GPP TS 23.228: “IP Multimedia Subsystem (IMS); Stage 2“. 7 3GPP TS 33.203: “3G security; Access security for IP-based servic
37、es“. 8 Void. 9 3GPP TS 23.203: “Policy and charging control architecture“. ETSI ETSI TR 124 980 V14.0.0 (2017-04)73GPP TR 24.980 version 14.0.0 Release 1410 3GPP TS 36.331: “Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification“. 11 3GPP TS 26.179:
38、 “Mission Critical Push To Talk; Codecs and media handling“. 12 GSMA PRD IR.92 (V9.0): “IMS Profile for Voice and SMS“ (http:/ 13 3GPP TS 24.383: “Mission Critical Push To Talk (MCPTT) Management Object (MO)“. 3 Definitions, symbols and abbreviations 3.1 Definitions For the purposes of the present d
39、ocument, the terms and definitions given in 3GPP TR 21.905 1 and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in 3GPP TR 21.905 1. MCPTT service: A Push To Talk communication service supporting applications for Mission Cri
40、tical Organizations and mission critical applications for other businesses and organizations (e.g., utilities, railways) with fast setup times, high availability, reliability and priority handling. MCPTT related APN: An APN utilised by the MCPTT service including the MCPTT service APN for the SIP-1
41、reference point, an MC common core services APN for the HTTP-1 reference point and a MC identity management service APN for the CSC-1 reference point. MCPTT UE: A UE that enables an MCPTT user to participate in MCPTT service. 3.2 Abbreviations For the purposes of the present document, the abbreviati
42、ons given in 3GPP TR 21.905 1 and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in 3GPP TR 21.905 1. EPC Evolved Packet Core MCPTT Mission Critical Push To Talk over LTE P-CSCF Proxy Call Session Control Fu
43、nction UM Unacknowledged Mode 4 Support of generic functions over the Gm reference point 4.1 General 4.1.1 MCPTT UE All of the mandatory capabilities for an E-UTRAN capable UE and EPS defined in 3GPP TS 24.229 4 are assumed as a baseline to be supported by the MCPTT UE for this profile. All of the m
44、andatory capabilities for the UE defined in 3GPP TS 24.301 5 are assumed as a baseline to be supported by the MCPTT UE for this profile. ETSI ETSI TR 124 980 V14.0.0 (2017-04)83GPP TR 24.980 version 14.0.0 Release 144.1.2 SIP core All the mandatory capabilities for the P-CSCF and S-CSCF for the mess
45、ages sent and received on the Gm reference point defined in 3GPP TS 24.229 4 are assumed as a baseline to be supported for this profile. 4.1.3 EPC All the mandatory capabilities for the MME defined in 3GPP TS 24.301 5 are assumed as a baseline to be supported for this profile. 4.2 Registration proce
46、dures 4.2.1 MCPTT UE The MCPTT UE follows the SIP registration procedures defined in 3GPP TS 24.229 4. In addition, when the conditions for performing IMS registration in bullets 2, 3, 4, 5 and 6 in subclause L.3.1.2 of 3GPP TS 24.229 4 evaluate to true, the MCPTT UE registers with the IMS. 4.2.2 SI
47、P core The SIP core follows the SIP registration procedures defined in 3GPP TS 24.229 4. The SIP core supports network-initiated de-registration as defined in 3GPP TS 24.229 4. 4.3 Authentication procedures 4.3.1 MCPTT UE The MCPTT UE follows the procedures defined in 3GPP TS 24.229 4 and 3GPP TS 33
48、.203 7 for authentication with IMS Authentication and Key Agreement (IMS-AKA), Sec-Agree and IPSec. The MCPTT UE supports integrity protection. 4.3.2 SIP core The SIP core follows the procedures defined in 3GPP TS 24.229 4 and 3GPP TS 33.203 7 for authentication with IMS-AKA, Sec-Agree and IPSec. Th
49、e SIP core supports integrity protection. 4.4 Session establishment procedures 4.4.1 General Session establishment procedures are described in 3GPP TS 24.229 4 and 3GPP TS 24.379 3. 4.5 Integration of resource management and SIP 4.5.1 MCPTT UE 4.5.1.1 Loss of PDN connectivity In accordance with GSMA PRD IR.92 12 section 2.4.2.1, if the MCPTT UE discovers (for example during a TAU procedure) that PDN connectivity had been lost to o
