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Content for  TS 23.468  Word version:  16.0.0

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1  ScopeWord‑p. 6
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.
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 (i) over MBMS Bearer Services using the Broadcast Mode of MBMS (TS 23.246); or (ii) over EPS Bearers; or (iii) 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.
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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]
TR 21.905: "Vocabulary for 3GPP Specifications".
[2]
TS 22.468: "Group Communication System Enablers for LTE (GCSE_LTE)".
[3]
TS 23.246: "Multimedia Broadcast/Multicast Service (MBMS); Architecture and functional description".
[4]
TS 29.214: "Policy and charging control over Rx reference point".
[5]
TS 23.401: "General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access".
[6]
TS 23.203: "Policy and charging control architecture".
[7]
TS 26.346: " Multimedia Broadcast/Multicast Service (MBMS); Protocols and codecs".
[8]
TS 33.246: "3G Security; Security of Multimedia Broadcast/Multicast Service (MBMS)".
[9]
TS 36.300: "Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access (E-UTRAN); Overall description; Stage 2".
[10]
TS 36.321: "Evolved Universal Terrestrial Radio Access (E-UTRA); Medium Access Control (MAC) protocol specification".
[11]
TS 23.303: "Proximity-based services (ProSe); Stage 2".
[12]
TS 23.280: "Common functional architecture to support mission critical services; Stage 2".
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3  Definitions and abbreviationsWord‑p. 7

3.1  Definitions

For the purposes of the present document, the terms and definitions 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.
MBMS Delivery:
A mechanism by which application data and signaling are delivered using MBMS bearer service over EUTRAN as defined in TS 23.246.
Unicast Delivery:
A mechanism by which application data and signaling are delivered using EPS bearer service over EUTRAN as defined in TS 23.401.
ProSe UE-to-Network Relay:
see TS 23.303.
Remote UE:
see TS 23.303.
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3.2  Abbreviations

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.
AS
Application Server
ARP
Allocation and Retention Priority
BM-SC
Broadcast Multicast - Service Centre
DL
Down Link
DRX
Discontinuous Reception
FEC
Forward Error Correction
FQDN
Fully Qualified Domain Name
GCS
Group Communication Service
GCS AS
Group Communication Service Application Server
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 Charging Enforcement Function
ProSe
Proximity-based Services
QCI
QoS Class Identifier
RoHC
Robust Header Compression
TMGI
Temporary Mobile Group Identity
UDP
User Datagram Protocol
vPCRF
visited Policy and Charging Rules Function
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