3 Definitions, symbols and abbreviations
24.5813GPPMission Critical Video (MCVideo) media plane controlProtocol specificationRelease 18TS
3.1 Definitions
For the purposes of the present document, the terms and definitions 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].
Transmission request queue: The transmission request queue used by the transmission control server to queue received Transmission Request messages.
Controlling MCVideo function: The MCVideo server performing a controlling role.
Effective priority: The priority decision determined by the transmission control server based on multiple input parameters like transmission priority, participant type, type of call etc. of the current transmission request and of the current participant to which transmission is granted if any and the local policy.
MBMS bearer: The service provided by the EPS to deliver the same IP datagrams to multiple receivers in a designated location.
MBMS subchannel: A logical channel which uses resources of an activated and announced MBMS bearer identified by the TMGI of the MBMS bearer and additional parameters, like UDP port, associated to a group or the MBMS subchannel used to e.g. inform when a transmission call is started or ended.
Media plane control protocols: Protocols in the media plane used for transmission control, pre-established session call control and MBMS subchannel control.
Participating MCVideo function: The MCVideo server performing a participating role.
For the purposes of the present document, the following terms and definitions given in 3GPP TS 23.281 [11] apply:
Transmission control
Transmission participant
Transmission control server
Group call
MCVideo call
MCVideo server performing a controlling role
MCVideo server performing a participating role
MCVideo user
Mission critical video
Private call
SIP core
For the purposes of the present document, the following terms and definitions given in 3GPP TS 33.179 [14] apply:
Client Server Key (CSK)
Client Server Key Identifier (CSK-ID)
Group Master Key (GMK)
Group Master Key Identifier (GMK-ID)
Multicast Key for Floor Control (MKFC)
Identifier of Multicast Key for Floor Control (MKFC-ID)
Multicast Signalling Key (MuSiK)
Multicast Signalling Key Identifier (MuSiK-ID)
Private Call Key (PCK)
Private Call Key Identifier (PCK-ID)
Signalling Protection Key (SPK)
Signalling Protection Key Identifier (SPK-ID)
MBMS SubChannel Control Key (MSCCK)
MBMS SubChannel Control Key Identifier (MSCCK-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 Symbols
3.3 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].
AS Application Server
D2D Device to Device
DL Downlink
GCS AS Group Communication Service Application Server
GMK Group Management Key
GMS Group Management Server
GUK-ID Group User Key Identifier
IP Internet Protocol
MBMS Multimedia Broadcast and Multicast Service
MCVideo Mission Critical Video
MKI Master Key Identifier
PCK Private Call Key
PCK-ID Private Call Identifier
RFC Request For Comment
RTCP RTP Control Protocol
RTP Real-time Transport Protocol
SRTCP Secure RTCP
SRTP Secure RTP
SSRC Synchronization SouRCe
TEK Traffic-Encrypting Key
TMGI Temporary Mobile Group Identity
UE User Equipment