3 Definitions of terms, symbols and abbreviations

29.3803GPPMission Critical Push To Talk (MCPTT) media plane control interworking with Land Mobile Radio (LMR) systemsRelease 17Stage 3TS

3.1 Terms

For the purposes of the present document, the terms given in 3GPP 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 3GPP TR 21.905 [1].

Floor participant: The floor participant functional entity is responsible for floor requests. In the present document this term can be a floor participant that can be in either an MCPTT system (ref. 3GPP TS 23.379 [5]) or in an IWF.

IWF floor control server: A floor control server that is in the IWF.

IWF floor participant: A floor participant that is in the IWF.

IWF media endpoint: A media endpoint that is in the IWF.

Media endpoint: The end producer or consumer of media and floor control traffic (see also "IWF media endpoint").

For the purposes of the present document, the following terms and definitions given in 3GPP TS 23.379 [5] apply:

Floor control

Floor participant

Floor control server

Group call

MCPTT call

Mission critical push to talk

Private call

SIP core

For the purposes of the present document, the following terms and definitions given in 3GPP TS 23.283 [24] apply:

Interworking Function (IWF)

For the purposes of the present document, the following terms and definitions given in 3GPP TS 29.379 [26] apply:

IWF performing the controlling role

IWF performing the non-controlling

IWF performing the participating role

For the purposes of the present document, the following terms and definitions given in 3GPP TS 24.380 [25] apply:

Active floor request queue

Conversation

Effective priority

Media burst

Media plane control protocols

Passive floor request queue

For the purposes of the present document, the following terms and definitions given in 3GPP TS 33.180 [18] apply:

Group Master Key (GMK)

Group Master Key Identifier (GMK-ID)

Private Call Key (PCK)

Private Call Key Identifier (PCK-ID)

Signalling Protection Key (SPK)

Signalling Protection Key Identifier (SPK-ID)

For the purposes of the present document, the following terms and definitions given in IETF RFC 3711 [16] apply:

SRTP master key (SRTP-MK)

SRTP master key identifier (SRTP-MKI)

SRTP master salt (SRTP-MS)

3.2 Abbreviations

For the purposes of the present document, the abbreviations given in 3GPP 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 3GPP TR 21.905 [1].

GMK Group Management Key

GMK-ID Group Master Key Identifier

GMS Group Management Server

GUK-ID Group User Key Identifier

IP Internet Protocol

MBMS Multimedia Broadcast and Multicast Service

MCPTT Mission Critical Push To Talk

PCK Private Call Key

PCK-ID Private Call Key Identifier

PTT Push-To-Talk

RFC Request For Comment

RTCP RTP Control Protocol

RTP Real-time Transport Protocol

SPK Signalling Protection Key

SPK-ID Signalling Protection Key Identifier

SRTCP Secure RTCP

SRTP Secure RTP

SRTP-MK SRTP master key

SRTP-MKI SRTP master key identifier

SRTP-MS SRTP master salt

SSRC Synchronization SouRCe

UE User Equipment