3 Definitions and abbreviations

23.4683GPPGroup Communication System Enablers for LTE (GCSE_LTE)Release 17Stage 2TS

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 TR 21.905 [1].

MBMS Delivery: A mechanism by which application data and signalling are delivered using MBMS bearer service over EUTRAN as defined in TS 23.246 [3].

Unicast Delivery: A mechanism by which application data and signalling are delivered using EPS bearer service over EUTRAN as defined in TS 23.401 [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 same 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

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