[Gen-art] Genart last call review of draft-ietf-rmcat-rtp-cc-feedback-10

Linda Dunbar via Datatracker <noreply@ietf.org> Tue, 09 August 2022 05:21 UTC

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Subject: [Gen-art] Genart last call review of draft-ietf-rmcat-rtp-cc-feedback-10
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Reviewer: Linda Dunbar
Review result: Almost Ready

I am the assigned Gen-ART reviewer for this draft. The General Area
Review Team (Gen-ART) reviews all IETF documents being processed
by the IESG for the IETF Chair.  Please treat these comments just
like any other last call comments.

For more information, please see the FAQ at


Document: draft-ietf-rmcat-rtp-cc-feedback-10

Reviewer: Linda Dunbar
Review Date: 2022-08-08
IETF LC End Date: 2022-08-09
IESG Telechat date: Not scheduled for a telechat

This document discusses the types of congestion control feedback using the RTP
Control Protocol. The document analyzes the feedback packet sizes and content
for point-to-point Voice Telephony and point-to-point Conference call.

Major issues:
Since most of today's conference bridges are multi-points to multi-points or at
least multi-points (users) to multi-servers, I think multi-points analysis
would be more useful. Will the author consider adding them?

As for the Consideration of the RTCP feedback (Section 2), should you also
consider how far away the endpoints are?  Will network congestion and distances
impact the RTCP feedback?

Section 1 states, "It is also assumed that the congestion control feedback
mechanism in RFC8888, .. are available." Question: Is the Congestion Control
Feedback mechanism described in this document the same as in RRC 8888? What are
the key differences?

Minor issues:

Nits/editorial comments:

Linda Dunbar