Use Cases for Telepresence Multistreams
RFC 7205
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RFC - Informational
(April 2014; No errata)
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Last updated |
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2015-10-14
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IETF
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Mary Barnes
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(last changed 2013-09-18)
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RFC 7205 (Informational)
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Gonzalo Camarillo
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Internet Engineering Task Force (IETF) A. Romanow
Request for Comments: 7205 Cisco
Category: Informational S. Botzko
ISSN: 2070-1721 M. Duckworth
Polycom
R. Even, Ed.
Huawei Technologies
April 2014
Use Cases for Telepresence Multistreams
Abstract
Telepresence conferencing systems seek to create an environment that
gives users (or user groups) that are not co-located a feeling of co-
located presence through multimedia communication that includes at
least audio and video signals of high fidelity. A number of
techniques for handling audio and video streams are used to create
this experience. When these techniques are not similar,
interoperability between different systems is difficult at best, and
often not possible. Conveying information about the relationships
between multiple streams of media would enable senders and receivers
to make choices to allow telepresence systems to interwork. This
memo describes the most typical and important use cases for sending
multiple streams in a telepresence conference.
Status of This Memo
This document is not an Internet Standards Track specification; it is
published for informational purposes.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Not all documents
approved by the IESG are a candidate for any level of Internet
Standard; see Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc7205.
Romanow, et al. Informational [Page 1]
RFC 7205 Telepresence Use Cases April 2014
Copyright Notice
Copyright (c) 2014 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Overview of Telepresence Scenarios . . . . . . . . . . . . . 4
3. Use Cases . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.1. Point-to-Point Meeting: Symmetric . . . . . . . . . . . . 7
3.2. Point-to-Point Meeting: Asymmetric . . . . . . . . . . . 7
3.3. Multipoint Meeting . . . . . . . . . . . . . . . . . . . 9
3.4. Presentation . . . . . . . . . . . . . . . . . . . . . . 10
3.5. Heterogeneous Systems . . . . . . . . . . . . . . . . . . 11
3.6. Multipoint Education Usage . . . . . . . . . . . . . . . 12
3.7. Multipoint Multiview (Virtual Space) . . . . . . . . . . 14
3.8. Multiple Presentation Streams - Telemedicine . . . . . . 15
4. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 16
5. Security Considerations . . . . . . . . . . . . . . . . . . . 16
6. Informative References . . . . . . . . . . . . . . . . . . . 16
Romanow, et al. Informational [Page 2]
RFC 7205 Telepresence Use Cases April 2014
1. Introduction
Telepresence applications try to provide a "being there" experience
for conversational video conferencing. Often, this telepresence
application is described as "immersive telepresence" in order to
distinguish it from traditional video conferencing and from other
forms of remote presence not related to conversational video
conferencing, such as avatars and robots. The salient
characteristics of telepresence are often described as: being actual
sized, providing immersive video, preserving interpersonal
interaction, and allowing non-verbal communication.
Although telepresence systems are based on open standards such as RTP
[RFC3550], SIP [RFC3261], H.264 [ITU.H264], and the H.323 [ITU.H323]
suite of protocols, they cannot easily interoperate with each other
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