Technical Summary
The document describes requirements for real-time media
congestion control. With the standardization of RTCWeb,
an increasing amount of real-time media is expected in the
Internet and this traffic needs to be appropriately congestion-
controlled. Real-time media traffic has quite different requirements
for congestion control as compared to most Internet traffic.
The requirements are listed in this document to develop and
later evaluate a congestion control scheme that is more suitable
for real-time media traffic than today's existing schemes.
Working Group Summary
There was quite a lot discussion in the working group on how
to define fairness (mainly in respect to evaluation criteria
document). For this document the working group decided to
leave the definition of fairness open (to be addressed in the
evaluation criteria document). Only self-fairness was defined
(as roughly equal bandwidth).
There was a discussion on RTT-fairness. This was added as
an optional requirement ("if possible").
Additionally this document addresses requirements to handle
different RTP streams multiplexed into one connection (5-tuple)
or different DSCP markings within one connection. Those points
were discussed on the RTCWeb and RMCAT mailing lists.
Document Quality
This document is an informational requirements document, thus
there are no implementations...
The document received several rounds of reviews in total of 10
different persons (including 4 in WGLC and 2 from people mainly
working in RTCweb) leading to discussions with even more people
involved. These discussions led to several additions and small
modifications to the requirements.
The document contains two references to other w-g documents
of RTCWeb and RMCAT.
Personnel
Mirja Kühlewind (mirja.kuehlewind@ikr.uni-stuttgart.de) is
Docoment Shepherd and one of the RMCAT working group chairs.
Spencer Dawkins <spencerdawkins.ietf@gmail.com> is the
responsible Area Director.