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TS 23.468  SA2 ★
GCSE_LTE —
Group Communication System Enablers for LTE

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use "ETSI‑search" to get the PDF version
for a better overview, the Table of Contents (ToC) is reproduced
V15.1.0 (PDF)  2019/09  33 p.
V14.0.0  2017/03  31 p.
V13.3.0  2015/12  32 p.
V12.7.0  2015/12  32 p.
3GPP 23.468 - Non-roaming reference architecture for GCSE_LTE
Rapporteur:  Mr. Liebhart, Rainer
The present document provides the stage 2 description for the 3GPP system provided enablers to support group communication services using E-UTRAN access.
The group communication system is represented by an Application 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
  1. over MBMS Bearer Services using the Broadcast Mode of MBMS; or
  2. over EPS Bearers; or
  3. over 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.
Application level interactions between the UE and the GCS Application Server are out of scope of this specification.

full Table of Contents for  TS 23.468  Word version:   15.1.0

Here   Top
1  Scope  Word-p. 6
2  References
3  Definitions and abbreviations  Word-p. 7
3.1  Definitions
3.2  Abbreviations
4  Architecture Model and Concepts
4.1  General Concept
4.2  Architectural Reference Model  Word-p. 9
4.2.1  General
4.2.2  Non-roaming architecture  Word-p. 10
4.2.3  Roaming architecture  Up
4.2.4  Architecture model using a ProSe UE-to-Network Relay for Public Safety [R13]  Word-p. 12
4.3  Reference points
4.3.1  General
4.3.2  List of Reference Points
4.3.2.1  GC1 reference point
4.3.2.2  MB2 reference point
4.3.2.3  SGmb/SGi-mb/M1/M3 reference points  Word-p. 13
4.3.2.4  Rx reference point
4.4  High level functions
4.4.1  Unicast Delivery  Up
4.4.2  MBMS Delivery
4.4.3  Service continuity
4.5  Network Elements
4.5.1  GCS AS
4.5.2  UE  Word-p. 14
4.5.3  PCRF
4.5.4  BM-SC
5  Functional Description and Information Flow
5.1  MB2: Interface between GCS AS and BM-SC
5.1.1  General  Up
5.1.2  MB2 Procedures  Word-p. 15
5.1.2.1  General
5.1.2.2  TMGI Management
5.1.2.2.1  General
5.1.2.2.2  TMGI Allocation Procedure
5.1.2.2.3  TMGI Deallocation Procedure  Word-p. 16
5.1.2.2.4  TMGI allocation period expiry  Word-p. 17
5.1.2.3  Activating and Deactivating an MBMS bearer
5.1.2.3.1  General
5.1.2.3.2  Activate MBMS Bearer Procedure  Up
5.1.2.3.3  Deactivate MBMS Bearer Procedure  Word-p. 19
5.1.2.4  Modify MBMS Bearer Procedure  Word-p. 20
5.1.2.5  MBMS Delivery Status Indication Procedure  Word-p. 21
5.2  Specific Usage of EPS Bearers for GCS
5.3  Service Continuity  Word-p. 22
5.3.1  General
5.3.2  Switching from Unicast Delivery to MBMS Delivery
5.3.3  Switching from MBMS Delivery to Unicast Delivery  Word-p. 23
5.3.3.1  General
5.3.3.2  MBMS Delivery to Unicast Delivery (make-before-break)  Up
5.3.3.3  MBMS Delivery to Unicast Delivery (break-before-make)  Word-p. 25
5.4  Priority and Pre-emption for Group Communication
5.5  Charging  Word-p. 28
5.6  Security
A  Utilisation of the Group Communication Service  Word-p. 29
A.1  General
A.2  Downlink Media path setup for MBMS Delivery
A.2.1  General
A.2.2  Use of Pre-established MBMS bearers
A.2.3  Use of Dynamic MBMS bearer establishment  Word-p. 30
B  Change history  Word-p. 32

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