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Content for  TS 23.281  Word version:  17.5.0

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1  ScopeWord‑p. 5
This document specifies the functional model, procedures and information flows needed for the mission critical video (MCVideo) service. Support for both MCVideo group streaming and MCVideo private streaming operating in on-network and off-network modes of operation is specified.
The corresponding service requirements are defined in TS 22.280, and TS 22.281.
The present document is applicable primarily to mission critical video service using E-UTRAN access based on the common functional architecture for mission critical services defined in TS 23.280 and the EPC architecture defined in TS 23.401.
The MCVideo service can be used for public safety applications and also for general commercial applications e.g. utility companies and railways.
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2  References

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 22.280: "Mission Critical Common Requirements (MCCoRe); Stage 1".
[3]
TS 22.281: "Mission Critical Video services".
[4]
TS 23.002: "Network Architecture".
[5]
TS 23.228: "IP Multimedia Subsystem (IMS); Stage 2".
[6]
TS 23.280: "Common functional architecture to support mission critical services; Stage 2".
[7]
TS 23.303: "Proximity-based services (ProSe); Stage 2".
[8]
TS 23.401: "General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access".
[9]
TS 23.468: "Group Communication System Enablers for LTE (GCSE_LTE); Stage 2".
[10]  Void
[11]
TS 23.203: "Policy and charging control architecture".
[12]
TS 36.331: "Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification".
[13]
TS 29.468: "Group Communication System Enablers for LTE (GCSE_LTE); MB2 reference point; Stage 3".
[14]
TS 33.180: "Security of the mission critical service".
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3  Definitions, symbols and abbreviationsWord‑p. 6

3.1  Definitions

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.
MCVideo client:
An instance of an MC service client that provides the client application function for the MCVideo service.
MCVideo group:
An MC service group configured for MCVideo service.
MCVideo group affiliation:
An MC service group affiliation for MCVideo.
MCVideo group de-affiliation:
An MC service group de-affiliation for MCVideo.
MCVideo group home system:
The mission critical system where the MCVideo group is defined.
MCVideo group host server:
The MCVideo server within a mission critical system which provides centralised support for MCVideo services of an MCVideo group defined in a MCVideo group home system.
MCVideo ID:
An instance of an MC service ID within the MCVideo service.
MCVideo server:
An instance of an MC service server that provides the server application function for the MCVideo service.
MCVideo service:
A video communication service supporting applications for mission critical organizations and mission critical applications for other businesses and organizations (e.g., utilities, railways) with strong security, high availability, reliability and priority handling.
MCVideo system:
The collection of applications, services, and enabling capabilities required to provide Mission Critical video for a Mission Critical Organization.
MCVideo UE:
An MC service UE that can be used to participate in MCVideo services.
MCVideo user:
An MC service user who is authorized for MCVideo services via an MCVideo UE.
Transmission control:
Video transmitting control mechanism in an MCVideo service that determines which participants have the authority to transmit video, and determines the onward downlink video transmission during an video call.
For the purposes of the present document, the following terms and definitions given in TS 22.280 apply:
Mission Critical
Mission Critical Applications
Mission Critical Service
Mission Critical Organization
Mission Critical System
For the purposes of the present document, the following terms and definitions given in TS 22.281 apply:
Real Time
Real Time Video
For the purposes of the present document, the following terms and definitions given in TS 23.280 apply:
MC service client
MC service group
MC service group affiliation
MC service group de-affiliation
MC service group home system
MC service group host
MC service ID
MC service server
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3.2  SymbolsWord‑p. 7
For the purposes of the present document, the following symbols given in TS 22.280 apply:
Nc2

3.3  Abbreviations

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.
E-UTRAN
Evolved Universal Terrestrial Radio Access Network
EPC
Evolved Packet Core
GCS AS
Group Communication Service Application Server
GCSE_LTE
Group Communication Service Enabler over LTE
HTTP
Hyper Text Transfer Protocol
IMS
IP Multimedia Subsystem
MC
Mission Critical
MCVideo
Mission Critical Video
MCVideo group ID
MCVideo group identity
MCVideo ID
MCVideo user identity
ProSe
Proximity-based Services
SIP
Session Initiated Protocol
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4  Introduction

The MCVideo service supports video media communication between several users (i.e. group call), where each user has the ability to gain access to the permission to stream video in an arbitrated manner. The MCVideo service also supports private calls between two users.
The MCVideo architecture is based on the functional architecture for mission critical communication services defined in TS 23.280.

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