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Enhancements in RTP Stream Pause and Resume Mechanisms for Improved Media Control

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This document discusses the enhancements made to the RTP stream pause and resume mechanisms as outlined in draft-westerlund-avtext-rtp-stream-pause. Key improvements include detailed guidance on utilizing simplified modes with TMMBR/TMMBN for pause/resume commands and presenting a clear overview of the pause problem with various topologies. Additionally, it proposes new SDP signaling methods and establishes consensus among working group members on the path forward for standard adoption, emphasizing better control over media actions in real-time communication scenarios.

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Enhancements in RTP Stream Pause and Resume Mechanisms for Improved Media Control

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  1. RTP Media Stream Pause / Resume draft-westerlund-avtext-rtp-stream-pause-05Bo Burman

  2. IPR Disclosure • For referred draft-westerlund-avtext-rtp-stream-pause • http://datatracker.ietf.org/ipr/1641/ (Ericsson) • https://datatracker.ietf.org/ipr/1935/ (Microsoft)

  3. Changes Since -04 • Improved and detailed text on use of the simplified mode where TMMBR/TMMBN are used for pause and resume • Editorial improvements

  4. Presentation Goal • Brief recapitulation of the problem • WG consensus on way forward

  5. Pause Problem Overview (1) M forwards from B to A and has no need for C B A M PAUSE C C

  6. Pause Problem Overview (2) M forwards from B to A and has no need for C B A M PAUSED C C

  7. Pause Problem Overview (3) M now needs to forward from C to A and has no need for B B A M PAUSE B RESUME C C

  8. Pause Problem Overview (4) B M forwards from C to A and has no need for B A M PAUSED B C

  9. Generic Supported Topologies Any Pause = PAUSE Delayed media action Can be refused Paused = PAUSED Resume = RESUME Refuse = REFUSE Both for PAUSE and RESUME New SDP signaling a=rtcp-fb:* ccm pause a=rfcp-fb:* ccm paused Simplified Supported Topologies Point-to-point Mixer Pause = TMMBR 0 Immediate media action Cannot be refused Paused = TMMBN 0 Resume = TMMBR >0 Refuse = TMMBN 0 For Resume (TMMBR >0) only Existing SDP signaling a=rtcp-fb:* ccmtmmbr Two Solution Modes

  10. Way Forward • Propose adoption as WG draft

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