For the purposes of the present document, the terms and definitions given in TR 21.905
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
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.
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
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.
An instance of an MC service client that provides the client application function for the MCPTT service.
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.
An instance of an MC service ID within the MCPTT service.
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 TS 22.179
MCPTT User Profile
Mission Critical Organization
Mission Critical Push To Talk
Off-network MCPTT service
Partner MCPTT system
Primary MCPTT system
For the purposes of the present document, the following terms and definitions given in RFC 5245
For the purposes of the present document, the following terms and definitions given in TS 23.280
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 TS 22.280
For the purposes of the present document, the following symbols given in TS 22.179
For the purposes of the present document, the abbreviations given in TR 21.905
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
Access Point Name
Allocation and Retention Priority
Broadcast Multicast Service Centre
Challenge-Handshake Authentication Protocol
Call Server Control Function
Direct Provisioning Function
Evolved Universal Terrestrial Radio Access Network
End to End Encryption
E-UTRAN Cell Global Identifier
Evolved Packet Core
Evolved Packet System
Guaranteed Bit Rate
Group Communication Service Application Server
Group Communication Service Enabler over LTE
Globally Routable User agent URI
Home Location Register
Home Subscriber Server
Hyper Text Transfer Protocol
Interactive Connectivity Establishment
IP Multimedia Core Network
IP Multimedia Private Identity
IP Multimedia PUblic identity
IP Multimedia Subsystem
Individual TETRA Subscriber Identity
Land Mobile Radio
Multimedia Broadcast and Multicast Service
Multimedia Broadcast multicast service Single Frequency Network
Mission Critical user identity
Mission Critical Push To Talk
MCPTT Application Server
MCPTT group ID
MCPTT group identity
MCPTT user identity
Network Address Translation
Password Authentication Protocol
Policy and Charging Control
Policy and Charging Rules Function
Public Land Mobile Network
Public Service Identity
Push To Talk
QoS Class Identifier
Quality of Service
Radio Access Network
Radio Set Identity
Service Area Identifier
Service Data Flow
Session Initiated Protocol
Secure Sockets Layer
Transport Layer Security
Temporary Mobile Group Identity
Uniform Resource Identifier
Universal Serial Bus
Wireless Local Area Network