3 Definitions, symbols and abbreviations
23.3793GPPFunctional architecture and information flows to support Mission Critical Push To Talk (MCPTT)Release 18Stage 2TS
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].
Automatic commencement mode: A mode in which the initiation of the private call does not require any action on the part of the receiving MCPTT user.
First-to-answer call: A call that is started when the first MCPTT user among multiple potential target recipients’ answers. This call requires the answering MCPTT user to answer manually; automatic answer is not allowed
Group call: A mechanism by which an MCPTT user can make a one-to-many MCPTT transmission to other users that are members of MCPTT group(s).
Group home MCPTT system: The MCPTT system where the MCPTT group is defined.
Group host MCPTT server: The MCPTT server within an MCPTT system that provides centralised support for MCPTT services of an MCPTT group defined in a group home MCPTT system.
Manual commencement mode: A mode in which the initiation of the private call requires the receiving MCPTT user to perform some action to accept or reject the call setup.
MCPTT client: An instance of an MC service client that provides the client application function for the MCPTT service.
MCPTT group: An MC service group configured for MCPTT service.
MCPTT group affiliation: An MC service group affiliation for MCPTT.
MCPTT group de-affiliation: An MC service group de-affiliation for MCPTT.
MCPTT ID: An instance of an MC service ID within the MCPTT service.
MCPTT server: An instance of an MC service server that provides the server application function for the MCPTT service.
On-network MCPTT service: The collection of functions and capabilities required to provide MCPTT via EPS bearers using E-UTRAN to provide the last hop radio bearers.
Preconfigured MCPTT group: an MCPTT group used only for regrouping that has been configured in advance of a group or user regrouping operation to serve as the source of regroup group configuration.
Pre-selected MCPTT user profile: An instance of the pre-selected MC service user profile for MCPTT.
UE-to-network relay MCPTT service: The collection of functions and capabilities required to provide MCPTT via a ProSe UE-to-network relay using ProSe direct communication paths to provide the last hop radio bearer(s).
Ad hoc Group Communication: The combining of a multiplicity of MC service users into a group for the duration of a communication. When the communication is released the group no longer exists.
For the purposes of the present document, the following terms and definitions given in 3GPP TS 22.179 [2] apply:
Dispatcher
Floor control
MCPTT administrator
MCPTT service
MCPTT system
MCPTT UE
MCPTT user
MCPTT User Profile
Mission Critical Organization
Mission Critical Push To Talk
Off-network MCPTT service
Partner MCPTT system
Primary MCPTT system
Private call
Multi-talker control
For the purposes of the present document, the following terms and definitions given in IETF RFC 5245 [13] apply:
Candidate
Candidate pair
For the purposes of the present document, the following terms and definitions given in 3GPP TS 23.280 [16] apply:
Active MC service user profile
MC service client
MC service group
MC service group affiliation
MC service group de-affiliation
MC service ID
MC service server
Pre‑selected MC service user profile
For the purposes of the present document, the following terms and definitions given in 3GPP TS 22.280 [17] apply:
Functional alias
3.2 Symbols
For the purposes of the present document, the following symbols given in 3GPP TS 22.179 [2] apply:
B1
B2
N2
N3
N4
N5
N6
N7
N10
N11
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].
APN Access Point Name
ARP Allocation and Retention Priority
BM-SC Broadcast Multicast Service Centre
CHAP Challenge-Handshake Authentication Protocol
CSCF Call Server Control Function
DL Downlink
DPF Direct Provisioning Function
E-UTRAN Evolved Universal Terrestrial Radio Access Network
E2EE End to End Encryption
ECGI E-UTRAN Cell Global Identifier
EPC Evolved Packet Core
EPS Evolved Packet System
GBR Guaranteed Bit Rate
GCS AS Group Communication Service Application Server
GCSE_LTE Group Communication Service Enabler over LTE
GRUU Globally Routable User agent URI
HLR Home Location Register
HSS Home Subscriber Server
HTTP Hyper Text Transfer Protocol
I-CSCF Interrogating CSCF
ICE Interactive Connectivity Establishment
IM CN IP Multimedia Core Network
IMPI IP Multimedia Private Identity
IMPU IP Multimedia PUblic identity
IMS IP Multimedia Subsystem
ITSI Individual TETRA Subscriber Identity
LMR Land Mobile Radio
MBMS Multimedia Broadcast and Multicast Service
MBSFN Multimedia Broadcast multicast service Single Frequency Network
MC Mission Critical
MC ID Mission Critical user identity
MCPTT Mission Critical Push To Talk
MCPTT AS MCPTT Application Server
MCPTT group ID MCPTT group identity
MCPTT ID MCPTT user identity
NAT Network Address Translation
PAP Password Authentication Protocol
P-CSCF Proxy CSCF
PCC Policy and Charging Control
PCRF Policy and Charging Rules Function
PLMN Public Land Mobile Network
ProSe Proximity-based Services
PSI Public Service Identity
PTT Push To Talk
QCI QoS Class Identifier
QoS Quality of Service
RAN Radio Access Network
RF Radio Frequency
RSI Radio Set Identity
S-CSCF Serving CSCF
SAI Service Area Identifier
SDF Service Data Flow
SIP Session Initiated Protocol
SSL Secure Sockets Layer
TLS Transport Layer Security
TMGI Temporary Mobile Group Identity
UM Unacknowledged Mode
URI Uniform Resource Identifier
USB Universal Serial Bus
WLAN Wireless Local Area Network