1、 ETSI TS 123 468 V14.0.0 (2017-05) LTE; Group Communication System Enablers for LTE (GCSE_LTE); Stage 2 (3GPP TS 23.468 version 14.0.0 Release 14) TECHNICAL SPECIFICATION ETSI ETSI TS 123 468 V14.0.0 (2017-05)13GPP TS 23.468 version 14.0.0 Release 14Reference RTS/TSGS-0223468ve00 Keywords LTE ETSI 6
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6、taff.aspx Copyright Notification No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm except as authorized by written permission of ETSI. The content of the PDF version shall not be modified without the written authorizatio
7、n 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 benefit of its Members. 3GPPTM and LTE are Tr
8、ade Marks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. oneM2M logo is protected for the benefit of its Members GSM and the GSM logo are Trade Marks registered and owned by the GSM Association. ETSI ETSI TS 123 468 V14.0.0 (2017-05)23GPP TS 23.468 version
9、 14.0.0 Release 14Intellectual 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: “Int
10、ellectual 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, inc
11、luding 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. Foreword This Technical Specification (TS)
12、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
13、 reference between GSM, UMTS, 3GPP and ETSI identities can be found under http:/webapp.etsi.org/key/queryform.asp. 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 describe
14、d 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 ETSI TS 123 468 V14.0.0 (2017-05)33GPP TS 23.468 version 14.0.0 Release 14Contents Intellectual Property Ri
15、ghts 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 5g31 Scope 6g32 References 6g33 Definitions and abbreviations . 7g33.1 Definitions 7g33.2 Abbreviations . 7g34 Architecture Model and Concepts 7g34.1 General Concept . 7g34.2 Architectural Reference Model 9g34.2.1 General 9g34.2.2 Non-roami
16、ng architecture . 9g34.2.3 Roaming architecture 10g34.2.4 Architecture model using a ProSe UE-to-Network Relay for Public Safety. 11g34.3 Reference points . 12g34.3.1 General 12g34.3.2 List of Reference Points 12g34.3.2.1 GC1 reference point 12g34.3.2.2 MB2 reference point . 12g34.3.2.3 SGmb/SGi-mb/
17、M1/M3 reference points . 12g34.3.2.4 Rx reference point . 12g34.4 High level functions . 12g34.4.1 Unicast Delivery . 12g34.4.2 MBMS Delivery . 13g34.4.3 Service continuity . 13g34.5 Network Elements 13g34.5.1 GCS AS 13g34.5.2 UE . 13g34.5.3 PCRF 13g34.5.4 BM-SC 13g35 Functional Description and Info
18、rmation Flow . 14g35.1 MB2: Interface between GCS AS and BM-SC 14g35.1.1 General 14g35.1.2 MB2 Procedures . 14g35.1.2.1 General 14g35.1.2.2 TMGI Management . 15g35.1.2.2.1 General 15g35.1.2.2.2 TMGI Allocation Procedure 15g35.1.2.2.3 TMGI Deallocation Procedure 15g35.1.2.2.4 TMGI allocation period e
19、xpiry 16g35.1.2.3 Activating and Deactivating an MBMS bearer . 16g35.1.2.3.1 General 16g35.1.2.3.2 Activate MBMS Bearer Procedure 17g35.1.2.3.3 Deactivate MBMS Bearer Procedure 18g35.1.2.4 Modify MBMS Bearer Procedure . 18g35.1.2.5 MBMS Delivery Status Indication Procedure . 19g35.2 Specific Usage o
20、f EPS Bearers for GCS 20g35.3 Service Continuity 20g35.3.1 General 20g35.3.2 Switching from Unicast Delivery to MBMS Delivery 21g35.3.3 Switching from MBMS Delivery to Unicast Delivery . 21g3ETSI ETSI TS 123 468 V14.0.0 (2017-05)43GPP TS 23.468 version 14.0.0 Release 145.3.3.1 General 21g35.3.3.2 MB
21、MS Delivery to Unicast Delivery (make-before-break) 22g35.3.3.3 MBMS Delivery to Unicast Delivery (break-before-make) 23g35.4 Priority and Pre-emption for Group Communication . 24g35.5 Charging . 26g35.6 Security 26g3Annex A (Informative): Utilisation of the Group Communication Service . 27g3A.1 Gen
22、eral . 27g3A.2 Downlink Media path setup for MBMS Delivery 27g3A.2.1 General . 27g3A.2.2 Use of Pre-established MBMS bearers . 27g3A.2.3 Use of Dynamic MBMS bearer establishment . 28g3Annex B (Informative): Change history . 29g3History 30g3ETSI ETSI TS 123 468 V14.0.0 (2017-05)53GPP TS 23.468 versio
23、n 14.0.0 Release 14Foreword This Technical Specification 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 the prese
24、nt 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 chan
25、ge 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 ETSI TS 123 468 V14.0.0 (2017-05)63GPP TS 23.468 version 14.0.
26、0 Release 141 Scope The present document provides the stage 2 description for the 3GPP system provided enablers to support group communication services using EUTRAN access. The corresponding stage 1 requirements are defined in TS 22.468 2. The group communication system is represented by an Applicat
27、ion Server (GCS AS) using the 3GPP system provided enablers for transferring its application signalling and for delivering application data, e.g. media data, to a group of UEs either (i) over MBMS Bearer Services using the Broadcast Mode of MBMS (TS 23.246 3); or (ii) over EPS Bearers; or (iii) over
28、 both MBMS and EPS bearer services. The specification covers both roaming and non-roaming scenarios and also includes support for service continuity, i.e. support for continuous reception of application data when a UE changes between reception of application data via EPS and MBMS Bearer Services. Ap
29、plication level interactions between the UE and the GCS Application Server are out of scope of this specification. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. - References are either specific (identifie
30、d 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 referen
31、ce 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 22.468: “Group Communication System Enablers for LTE (GCSE_LTE)“. 3 3GPP TS 23.246: “Multimedia Broadcast/Multicast Service (MBMS
32、); Architecture and functional description“. 4 3GPP TS 29.214: “Policy and charging control over Rx reference point“. 5 3GPP TS 23.401: “General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access“. 6 3GPP TS 23.203: “Policy and charging c
33、ontrol architecture“. 7 3GPP TS 26.346: “ Multimedia Broadcast/Multicast Service (MBMS); Protocols and codecs“. 8 3GPP TS 33.246: “3G Security; Security of Multimedia Broadcast/Multicast Service (MBMS)“. 9 3GPP TS 36.300: “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Ter
34、restrial Radio Access (E-UTRAN); Overall description; Stage 2“. 10 3GPP TS 36.321: “Evolved Universal Terrestrial Radio Access (E-UTRA); Medium Access Control (MAC) protocol specification“. 11 3GPP TS 23.303: “Proximity-based services (ProSe); Stage 2“. ETSI ETSI TS 123 468 V14.0.0 (2017-05)73GPP TS
35、 23.468 version 14.0.0 Release 143 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the terms and definitions given in 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
36、TR 21.905 1. MBMS Delivery: A mechanism by which application data and signaling are delivered using MBMS bearer service over EUTRAN as defined in TS 23.246 3. Unicast Delivery: A mechanism by which application data and signaling are delivered using EPS bearer service over EUTRAN as defined in TS 23.
37、401 5. ProSe UE-to-Network Relay: see TS 23.303 11. Remote UE: see TS 23.303 11. 3.2 Abbreviations For the purposes of the present document, the abbreviations given in TR 21.905 1 and the following apply. An abbreviation defined in the present document takes precedence over the definition of the sam
38、e abbreviation, if any, in TR 21.905 1. AS Application Server ARP Allocation and Retention Priority BM-SC Broadcast Multicast - Service Centre DL Down Link DRX Discontinuous Reception FQDN Fully Qualified Domain Name GCS Group Communication Service GCS AS Group Communication Service Application Serv
39、er GCSE_LTE Group Communication System Enabler for LTE MBMS Multimedia Broadcast/Multicast Service MBSFN Multimedia Broadcast multicast service Single Frequency Network MCH Multicast Channel MCCH Multicast Control Channel MTCH Multicast Traffic Channel PCC Policy and Charging Control PCEF Policy and
40、 Charging Enforcement Function ProSe Proximity-based Services QCI QoS Class Identifier TMGI Temporary Mobile Group Identity UDP User Datagram Protocol vPCRF visited Policy and Charging Rules Function 4 Architecture Model and Concepts 4.1 General Concept This specification describes how a GCS Applica
41、tion Server (GCS AS) may use the enablers offered by the 3GPP system for providing a Group Communication Service (GCS). These enablers are denoted as Group Communication System Enablers (GCSE). The GCS AS uses EPS bearer services and may use in addition MBMS bearer services for transferring applicat
42、ion signalling and data between the GCS AS and the UEs. In uplink direction, the UE uses an EPS bearer service to exchange application signalling with the GCS AS or when it wants to send data to the GCS AS. In downlink direction the GCS AS may transfer application signalling and data via the UE indi
43、vidual EPS bearer services and/or via MBMS ETSI ETSI TS 123 468 V14.0.0 (2017-05)83GPP TS 23.468 version 14.0.0 Release 14bearer service. The GCS UEs register with their GCS AS using application signalling for participating in one or multiple GCS groups. NOTE 1: GCS application signalling (e.g. for
44、group admission and floor control) and GCS group management aspects (such as group creation, deletion, modification, group membership control, etc) are out of scope of this specification. When an MBMS bearer service is used, its broadcast service area may be pre-configured for use by the GCS AS. Alt
45、ernatively, the GCS AS may dynamically decide to use an MBMS bearer service when it determines that the number of UE for a GCS group is sufficiently large within an area (e.g. within a cell or a collection of cells). When MBMS bearer service is used, GCS AS may transfer data from different GCS group
46、s over a single MBMS broadcast bearer. The application signalling and data transferred via MBMS bearer(s) are transparent to BM-SC and the MBMS bearer service. The GCS AS provides the UEs via GCS application signalling with all configuration information that the UE needs to receive application data
47、via MBMS bearer services and to handle that data appropriately. When a GCS UE moves between areas where its MBMS broadcast bearers are available or not, the UE informs the GCS AS via application signalling that it changes from MBMS broadcast bearer reception to non-reception, or vice versa, the GCS
48、AS activates or deactivates the downlink application signalling and data transfer via the UE individual EPS bearer(s) as appropriate. To accomplish service continuity, a UE may temporarily receive the same GCS application signalling and data in parallel via EPS bearer(s) and MBMS service(s). The GCS
49、 UE application discards any received application signalling or data duplicates. The following diagram shows an example of a scenario where a combination of Unicast and MBMS Delivery is used for a particular media, belonging to a single group, by the GCS AS on the DL to different UEs. Here, UE-1 and UE-2 receive DL traffic over unicast whereas UEs 3-6 receive DL traffic over MBMS. NOTE 2: Even though UE-2, UE-3 and UE-4 are connected to the same eNB (eNB-2), the UEs may be using different delivery modes. For example, UE-2 is using uni
