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Content for  TR 24.803  Word version:  12.0.0

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1  ScopeWord‑p. 6
The present document contains the study on Telepresence using IP Multimedia (IM) Core Network (CN) subsystem based on the Session Initiation Protocol (SIP), Session Description Protocol (SDP) and other protocols of controlling multiple streams for Telepresence based on service requirements.
The study aims, within the defined CT1 work areas, at:
  • analysing IMS session procedures and signalling between the UE and core network for Telepresence creation, establishment with media negotiation and configuration, session modification and termination, with the incorporation of new protocol (i.e. CLUE as under developing in IETF);
  • investigating impacts for presentation in Telepresence and floor control in IMS;
  • analysing similar impacts to allow legacy devices interworked with Telepresence using IMS; and
  • studying potential enhancements and extensions to facilitate these procedures.
This study will identify specification areas, if any, that lie within the scope of other 3GPP working groups, and seek input from those 3GPP working groups to define that related specification work.
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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 24.147: "Conferencing using the IP Multimedia (IM) Core Network (CN) subsystem; Stage 3".
[3]
TS 24.229: "Internet Protocol (IP) multimedia call control protocol based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP); Stage 3".
[4]
TS 23.228: "Technical Specification Group Services and System Aspects; IP Multimedia Subsystem (IMS); Stage 2".
[5]
RFC 3261  (June 2002): "SIP: Session Initiation Protocol".
[6]
RFC 4566  (July 2006): "SDP: Session Description Protocol".
[7]
RFC 4582  (November 2006): "The Binary Floor Control Protocol (BFCP)".
[8]
RFC 4583  (November 2006): "Session Description Protocol (SDP) Format for Binary Floor Control Protocol (BFCP) Streams".
[9]
draft-ietf-clue-framework-14  (February 2014): "Framework for Telepresence Multi-Stream".
[10]
TS 29.162: "Interworking between the IM CN subsystem and IP networks".
[11]
TS 29.163: "Interworking between the IP Multimedia (IM) Core Network (CN) subsystem and Circuit Switched (CS) networks".
[12]
TS 29.165: "Inter-IMS Network to Network Interface (NNI)".
[13]
TS 29.414: "Core network Nb data transport and transport signalling".
[14]
RFC 5761  (April 2010): "Multiplexing RTP Data and Control Packets on a Single Port".
[15]
RFC 3264  (June 2002): "An Offer/Answer Model with Session Description Protocol (SDP)".
[16]
draft-ietf-clue-signaling-00  (April 2014): "CLUE Signaling".
[17]
draft-ietf-clue-datachannel-00  (March 2014): "CLUE Protocol Data Channel".
[18]
draft-ietf-mmusic-sctp-sdp-06  (February 2014): "Stream Control Transmission Protocol (SCTP) -Based Media Transport in the Session Description Protocol (SDP)".
[19]
TS 24.103: " Telepresence using the IP Multimedia (IM) Core Network (CN) Subsystem (IMS); Stage 3".
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3  Definitions and abbreviationsWord‑p. 7

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.
Telepresence:
A conference with interactive audio-visual communications experience between remote locations, where the users enjoy a strong sense of realism and presence between all participants by optimizing a variety of attributes such as audio and video quality, eye contact, body language, spatial audio, coordinated environments and natural image size.
CLUE channel:
A reliable, bidirectional, transport mechanism used to convey CLUE messages. A CLUE channel consists of one SCTP stream in each direction over a DTLS/SCTP session.
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3.2  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.
BFCP
Binary Floor Control Protocol
CLUE
ControLling mUltiple streams for tElepresence
DCEP
Data Channel Establishment Protocol
DTLS
Datagram Transport Layer Security
IMS
IP Multimedia CN subsystem
SCTP
Stream Control Transmission Protocol
SDP
Session Description Protocol
SIP
Session Initiation Protocol
TCP
Transmission Control Protocol
TP
TelePresence
UDP
User Datagram Protocol
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