Content for TR 23.781 Word version: 15.0.0
1 Scope p. 7
The present document studies solutions to satisfy the requirements for interconnection and migration between Mission Critical systems. It may identify enhancements to be included in the Technical Specifications for those services. Requirements for this study are taken from the Stage 1 requirements, including TS 22.179, TS 22.280, TS 22.281 and TS 22.282.
2 References p. 7
The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
- References are either specific (identified by date of publication, edition number, version number, etc.) or non specific.
- For a specific reference, subsequent revisions do not apply.
- For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
[1]
TR 21.905: "Vocabulary for 3GPP Specifications".
[2]
TS 22.179: "Mission Critical Push to Talk (MCPTT) over LTE; Stage 1".
[3]
TS 22.280: "Mission Critical Services Common Requirements (MCCore); Stage 1".
[4]
TS 22.281: "Mission Critical Video services over LTE".
[5]
TS 22.282: "Mission Critical Data services over LTE".
[6]
TS 23.280: "Common functional architecture to support mission critical services; Stage 2".
[7]
TS 23.379: "Functional architecture and information flows to support Mission Critical Push To Talk (MCPTT); Stage 2".
[8]
TS 24.379: "Mission Critical Push To Talk (MCPTT) call control; Protocol specification".
[9]
TS 33.179: "Security of Mission Critical Push To Talk (MCPTT) over LTE".
[10]
TS 23.281: "Functional architecture and information flows to support Mission Critical Video (MCVideo); Stage 2".
[11]
TS 23.282: "Functional architecture and information flows to support Mission Critical Data (MCData); Stage 2".
[12]
TS 33.180: "Security of the mission critical service".
3 Definitions and abbreviations p. 7
3.1 Definitions p. 7
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.
Group call:
A mechanism by which an MCPTT user can make one-to-many MCPTT transmissions to other MCPTT users that are affiliated members of an MCPTT group.
Group home MCPTT system:
The MCPTT system where the MCPTT group is defined.
Group host MCPTT server:
The MCPTT server within an MCPTT system which provides centralised support for MCPTT services of an MCPTT group defined in a group home MCPTT system.
Interconnection:
A means of communication between MCPTT systems whereby MCPTT users obtaining service from one MCPTT system can communicate with other MCPTT users who are obtaining MCPTT service from one or more other MCPTT systems.
Interconnection group:
An MCPTT group that is configured to allow inclusion of group members who are users from partner MCPTT system(s).
MCPTT system:
The collection of applications, services, and enabling capabilities required to provide Mission Critical Push To Talk for one or more Mission Critical Organizations, managed by a single MCPTT service provider.
Migration:
A means for an MCPTT user to obtain MCPTT service directly from a partner MCPTT system.
For the purposes of the present document, the following terms and definitions given in TS 22.179 apply:
Partner MCPTT system
Primary MCPTT system
Private call
3.2 Abbreviations p. 8
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.
GMS
Group Management Server
MCPTT
Mission Critical Push To Talk
