3 Definitions and abbreviations

3GPP44.068Group Call Control (GCC) protocolRelease 17TS

3.1 Definitions

For the purposes of the present document the terms and definitions given in 3GPP TS 42.068 and the following apply:

attachment of the user connection: See 3GPP TS 24.008, subclause 5.2.

calling user: GCC entity in the Mobile Station (MS) initiating or having initiated a group call.

clearing the context related to the group call establishment: all running GCC timers in the relevant GCC entity are stopped, all attributes in the relevant GCC entity are deleted.

downlink: network to mobile station direction.

group call: is used in the same sense as "voice group call".

group call channel: combined uplink/downlink to be allocated in each cell of the group call area for a particular group call. The uplink can be used by the presently talking service subscriber only. All MSs of the listening service subscribers in one cell shall listen to the common downlink.

group receive mode: See 3GPP TS 44.018.

originating mobile station: mobile station initiating or having initiated the group call.

NOTE 1: In certain situations, a MS assumes to be the originating MS of a group call without actually being the originating MS of that group call.

NOTE 2: There may be one or none originating MS for a given group call.

uplink: mobile station to network direction.

3.2 Abbreviations

For the purposes of the present document, the abbreviations given in 3GPP TR 21.905 [1a] and the following apply:

BSS Base Station System

eMLPP enhanced Multi-Level Precedence and Pre-emption service

GCC Group Call Control
GPRS General Packet Radio Service

MS Mobile Station

VGCS Voice Group Call Service

CM Connection Management

TI Transaction Identifier