A Framework for Centralized Conferencing
RFC 5239
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RFC - Proposed Standard
(June 2008; Errata)
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Last updated |
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2015-10-14
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draft-barnes-xcon-framework
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IETF
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bibtex
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No shepherd assigned
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RFC 5239 (Proposed Standard)
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Consensus Boilerplate |
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Telechat date |
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Responsible AD |
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Cullen Jennings
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Adam Roach is proto shepherd
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adam@nostrum.com
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Network Working Group M. Barnes
Request for Comments: 5239 Nortel
Category: Standards Track C. Boulton
Avaya
O. Levin
Microsoft Corporation
June 2008
A Framework for Centralized Conferencing
Status of This Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Abstract
This document defines the framework for Centralized Conferencing.
The framework allows participants using various call signaling
protocols, such as SIP, H.323, Jabber, Q.931 or ISDN User Part
(ISUP), to exchange media in a centralized unicast conference. The
Centralized Conferencing Framework defines logical entities and
naming conventions. The framework also outlines a set of
conferencing protocols, which are complementary to the call signaling
protocols, for building advanced conferencing applications. The
framework binds all the defined components together for the benefit
of builders of conferencing systems.
Barnes, et al. Standards Track [Page 1]
RFC 5239 Centralized Conferencing Framework June 2008
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Conventions . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
4. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5. Centralized Conferencing Data . . . . . . . . . . . . . . . . 10
5.1. Conference Information . . . . . . . . . . . . . . . . . . 11
5.2. Conference policies . . . . . . . . . . . . . . . . . . . 12
6. Centralized Conferencing Constructs and Identifiers . . . . . 12
6.1. Conference Identifier . . . . . . . . . . . . . . . . . . 13
6.2. Conference Object . . . . . . . . . . . . . . . . . . . . 13
6.2.1. Conference Object Identifier . . . . . . . . . . . . . 15
6.3. Conference User Identifier . . . . . . . . . . . . . . . . 16
7. Conferencing System Realization . . . . . . . . . . . . . . . 17
7.1. Cloning Tree . . . . . . . . . . . . . . . . . . . . . . . 17
7.2. Ad Hoc Example . . . . . . . . . . . . . . . . . . . . . . 20
7.3. Advanced Example . . . . . . . . . . . . . . . . . . . . . 21
7.4. Scheduling a Conference . . . . . . . . . . . . . . . . . 23
8. Conferencing Mechanisms . . . . . . . . . . . . . . . . . . . 26
8.1. Call Signaling . . . . . . . . . . . . . . . . . . . . . . 26
8.2. Notifications . . . . . . . . . . . . . . . . . . . . . . 26
8.3. Conference Control Protocol . . . . . . . . . . . . . . . 26
8.4. Floor Control . . . . . . . . . . . . . . . . . . . . . . 26
9. Conferencing Scenario Realizations . . . . . . . . . . . . . . 28
9.1. Conference Creation . . . . . . . . . . . . . . . . . . . 28
9.2. Participant Manipulations . . . . . . . . . . . . . . . . 30
9.3. Media Manipulations . . . . . . . . . . . . . . . . . . . 32
9.4. Sidebar Manipulations . . . . . . . . . . . . . . . . . . 33
9.4.1. Internal Sidebar . . . . . . . . . . . . . . . . . . . 35
9.4.2. External Sidebar . . . . . . . . . . . . . . . . . . . 37
9.5. Floor Control Using Sidebars . . . . . . . . . . . . . . . 40
9.6. Whispering or Private Messages . . . . . . . . . . . . . . 42
9.7. Conference Announcements and Recordings . . . . . . . . . 44
9.8. Monitoring for DTMF . . . . . . . . . . . . . . . . . . . 46
9.9. Observing and Coaching . . . . . . . . . . . . . . . . . . 46
10. Relationships between SIP and Centralized Conferencing
Frameworks . . . . . . . . . . . . . . . . . . . . . . . . . . 49
11. Security Considerations . . . . . . . . . . . . . . . . . . . 50
11.1. User Authentication and Authorization . . . . . . . . . . 51
11.2. Security and Privacy of Identity . . . . . . . . . . . . . 53
11.3. Floor Control Server Authentication . . . . . . . . . . . 53
12. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 53
13. References . . . . . . . . . . . . . . . . . . . . . . . . . . 54
13.1. Normative References . . . . . . . . . . . . . . . . . . . 54
13.2. Informative References . . . . . . . . . . . . . . . . . . 54
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