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XCON BOF. IETF 57 Vienna, Austria July 15, 2003. Administriva. Conscripting a Scribe Note Well announcement (Read Section 10 of RFC 2026) Blue Sheets. Agenda. Welcome and Agenda Bashing (5 min) Problem Statement/Scope Overview (10 min) Charter Discussion (15 min)

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xcon bof

XCON BOF

IETF 57

Vienna, Austria

July 15, 2003

administriva
Administriva
  • Conscripting a Scribe
  • Note Well announcement (Read Section 10 of RFC 2026)
  • Blue Sheets
agenda
Agenda
  • Welcome and Agenda Bashing (5 min)
  • Problem Statement/Scope Overview (10 min)
  • Charter Discussion (15 min)
  • Open Discussion (30 min)
problem statement scope
Problem Statement/Scope
  • Defining protocols necessary for participants to control centralized conferences:
    • Conference Policy Control
      • Two objects and two sets of operations on:
        • General policy and membership
        • Media policy
    • Floor Control
  • Motivated by SIP conferencing, but will be independent of call setup protocol.
  • Protocols developed will not be SIP or SIP extensions
conference policy control
Conference Policy Control
  • Conference Lifespan
  • Who can participate (permissions)
  • What each participant can do (roles)
  • Notification of conference membership (roster)
  • Related Documents:
    • draft-koskelainen-xcon-cpcp-reqs-00.txt
    • draft-koskelainen-xcon-xcap-cpcp-usage-00.txt
    • draft-levin-xcon-cpcp-00.txt
media policy control
Media Policy Control
  • Defines how media is combined, selected, and modified in a conference
  • Multiple media types: audio, video, IM, etc.
  • Result of floor control is an input
  • Protocol defines how a topology is created, retrieved, and manipulated
  • Related Documents:
    • draft-even-xcon-media-policy-requirements-00.txt
    • draft-mahy-xcon-media-policy-control-00.txt
floor control
Floor Control
  • Floor Definition
    • Temporary permission for a conference participant to access or manipulate a specific shared resource or group of resources.
  • Examples include:
    • Who gets to be heard or be seen by all participants
    • Who can control a shared whiteboard pointer
  • Floor Control Protocol Operations
    • Floor creation (related to media policy)
    • Floor requesting, granting, and releasing
  • Related Document:
    • draft-koskelainen-xcon-floor-control-req-00.txt
example use scenario
Example Use Scenario
  • User is invited to a conference (dials in) and learns they are in a conference
  • Subscribes to the conference package and learns the roster and the conference policy URIs
  • Uses media policy and discovers that the conference is a "lecture" with audio and video and as a result enables video to fully participate in the conference.
  • Uses conference policy to establish a sidebar (sub-conference) with another participant
  • Uses floor control to request the floor to ask a question
  • draft-even-xcon-conference-scenarios-00.txt
example topology central control and mixing
Example Topology: Central Control and Mixing

Focus

Out Of

Scope

Media

Mixer

Media

Call Control

example topology cascaded conferences
Example Topology: Cascaded Conferences

User 1

User 4

Conference A

Conference B

Focus

Focus

User 2

Media

Mixer

Media

Mixer

User 3

Media

Call Control

relation to other wgs
Relation to Other WGs
  • SIPPING
  • MMUSIC
  • AVT
  • SIP
  • W3C SMIL
charter 1 4 deliverables
Charter (1/4): Deliverables
  • A mechanism for membership and authorization control
  • A mechanism to manipulate and describe media "layout" or "topology" for multiple media types
  • A mechanism for notification of conference related events/changes (policy/floor events)
  • A basic floor control protocol
charter 2 4 non deliverables
Charter (2/4): NON-Deliverables
  • Voting
  • Multicast media (due to security concerns)
  • Fully distributed conferences
  • Loosely-coupled conferences (no central point of control)
  • Far-end device control
  • Protocol used between the conference controller and the mixer(s)
  • Capabilities negotiation of the mixer(s)
  • Master-slave cascaded conferences
charter 3 4 external inputs
Charter (3/4): External Inputs
  • draft-ietf-sipping-conferencing-requirements-00.txt
  • draft-ietf-sipping-conferencing-framework-00.txt
  • draft-ietf-sipping-cc-conferencing-01.txt
  • draft-ietf-sipping-cc-framework-02.txt
  • draft-ietf-sipping-conference-package-01.txt(get copy from http://ee.wustl.edu/~alan/sip-conf/)
charter 4 4 proposed items
Charter (4/4): Proposed Items
  • draft-even-xcon-conference-scenarios-00.txt
  • draft-koskelainen-xcon-cpcp-reqs-00.txt
  • draft-even-xcon-media-policy-requirements-00.txt
  • draft-koskelainen-xcon-floor-control-req-00.txt
  • draft-koskelainen-xcon-xcap-cpcp-usage-00.txt
  • draft-levin-xcon-cpcp-00.txt
  • draft-mahy-xcon-media-policy-control-00.txt
next steps issues
Next Steps/Issues
  • Consensus/Approval for Charter
  • Finalize Conference Policy Requirements
  • Decide on protocol
    • XCAP/SOAP/XML-RPC
  • Continue work on Media Policy
  • Create policy notification packages
  • Define interface between Media Policy and Floor Control
further info
Further Info

Mailing List:

http://www.softarmor.com/mailman/listinfo/xcon

SUBSCRIBE to xcon-request@softarmor.com

BOF Chairs:

Alan Johnston (alan.johnston@mci.com)

Adam Roach (adam@dynamicsoft.com)