Content for TR 26.880 Word version: 14.0.0
0 Introduction p. 4
The MCVideo service supports video media communication between 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 and TS 23.281.
1 Scope p. 5
The present document describes the enhancements of MBMS for MCVideo service support. Codec(s) and media handling to enable delivery of MCVideo are documented.
2 References p. 5
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 Services Common Requirements".
[3]
TS 22.281: (V14.2.0) "Mission Critical Video Services over LTE".
[4]
TS 23.280: "Common functional architecture to support mission critical services; Stage 2".
[5]
TS 23.281: "Functional architecture and information flows for mission critical video; Stage 2".
[6]
TS 23.468: "Group Communication System Enablers for LTE (GCSE_LTE); Stage 2".
[7]
TR 23.780: "Study on Multimedia Broadcast and Multicast Service (MBMS) usage for mission critical communication services".
[8]
TS 26.346: "Multimedia Broadcast/Multicast Service (MBMS); Protocols and codecs".
[9]
TS 33.179: "Security of Mission Critical Push To Talk (MCPTT) over LTE".
[10]
TR 33.880: "Study on Mission Critical Security Enhancements".
[11]
TS 26.179: "Mission Critical Push To Talk (MCPTT); Codecs and media handling".
[12]
RFC 6184: "RTP Payload Format for H.264 Video".
[13]
TS 26.906: "Evaluation of High Efficiency Video Coding (HEVC) for 3GPP services."
[14]
RFC 3550: "RTP: A Transport Protocol for Real-Time Applications".
3 Definitions and Abbreviations p. 5
3.1 Definitions p. 5
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:
The MCVideo client functional entity acts as the user agent for all MCVideo application transactions.
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 UE:
An MC service UE that can be used to participate in MCVideo services.
MCVideo User:
An MC service user who is authorized to MCVideo services via an MCVideo UE.
Mission Critical:
Quality or characteristic of a communication activity, application, service or device, that requires low setup and transfer latency, high availability and reliability, ability to handle large numbers of users and devices, strong security and priority and pre-emption handling.
Mission Critical Applications:
Generic communication applications with mission critical characteristics, traditionally encompassing push-to-talk voice (MCPTT), real-time video (MCVideo) and real-time data (MCData).
3.2 Abbreviations p. 6
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.
AVC
Advanced Video Coding
BC
BroadCast
BM-SC
Broadcast-Multicast - Service Centre
CHP
Constrained High Profile
FEC
Forward Error Correction
fps
frames per second
GCS
Group Communication Service
HEVC
High Efficiency Video Coding
MBMS
Multimedia Broadcast/Multicast Service
MBSFN
Multimedia Broadcast Single Frequency Network
MC
Mission Critical
MCPTT
Mission Critical Push-To-Talk
MCVideo
Mission Critical Video
RTCP
Real-Time Transport Control Protocol
RTP
Real-Time Transport Protocol
SRTCP
Secure Real-Time Transport Control Protocol
SRTP
Secure Real-Time Transport Protocol
TMGI
Temporary Mobile Group Identity
UC
UniCast
