Multimedia Conferencing Requirements for SIP Based Systems - PowerPoint PPT Presentation

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Multimedia Conferencing Requirements for SIP Based Systems

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Roni.Even_at_polycom.co.il. March 18, 2002. 53rd IETF. SIPPING WG. The Objectives for Adding ' ... Provide a (BCP) Guide for Building Interoperable SIP-based ... – PowerPoint PPT presentation

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Title: Multimedia Conferencing Requirements for SIP Based Systems


1
Multimedia Conferencing Requirements for SIP
Based Systems
  • draft-levin-sip-for-video-01.txt
  • Orit Levin
  • Orit_at_radvision.com
  • Roni Even
  • Roni.Even_at_polycom.co.il

2
The Objectives for Adding Multimedia
Conferencing for SIP to SIP/SIPPING Charter
  • Provide a (BCP) Guide for Building Interoperable
    SIP-based MULTIMEDIA Conferencing Applications
  • The Timing for this Work is Excellent

3
Our Roadmap
  • THE DRAFT Puts together the Requirements that
    are necessary for participation (and optional
    hosting) of MULTIMEDIA Conferencing in a standard
    way
  • THE NEXT STEP Write a Framework that maps the
    requirements to documents describing the
    solutions

4
Our Functionality Guidelines
  • Make Multimedia (Conferencing) calls work like
    Voice-only calls
  • Similar user experience
  • Simple migration from Voice-only conferencing
    applications
  • Enable SIP Multimedia Conferencing with basic
    User Agents
  • Voice only
  • Non-conferencing aware

5
Our Design Guidelines Base the solution on
existing works whenever possible
  • Call Control SIPPING
  • draft-ietf-sipping-cc-framework-00.txt
  • Capabilities Exchange/Declaration MMUSIC
  • draft-andreasen-mmusic-sdp-simcap-05.txt
  • T.120 and other application integration MMUSIC
  • Media Control AVT/MMUSIC/SIPPING Open Issue -gt
    Next Slide
  • Conferencing and Floor Control SIPPING
  • draft-ietf-sipping-conferencing-models-00.txt
  • draft-rosenberg-sip-call-package-00.txt
  • draft-miladinovic-sip-multiparty-ext-00.txt

6
Critical Open Design Issue Media Control Is
the Solution in AVT, MMUSIC, or Somewhere Else?
  • Examples of Media Control
  • Change CODEC modes Resolution, Frame Rate
  • Video Fast Update, Video Freeze
  • Implications on SIP-based Applications
  • Distributed model (control and media) is hard to
    implement
  • Voice and Video corresponding primitives are
    defined in different protocols
  • RTP/RTCP are not reliable (UDP!)

7
Critical Open Design Issue Media Control Is an
Informal Ad-hock Meeting Required ?
  • AVT options
  • RTCP draft-ietf-avt-rtcp-feedback-02.txt
  • RTP draft-rajeshkumar-avt-sse-00.txt
  • MMUSIC options
  • Use SDP
  • Somewhere Else
  • Introduce a new Control Protocol

8
Going Forward
  • Write a Framework that Maps the Requirements to
    Solutions
  • Point to Existing Drafts and Approaches Whenever
    Possible
  • Base the work on (and provide inputs to) the
    Multi-party Application Framework
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