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Re: [quicwg/base-drafts] Attempt to define slow start/congestion avoidance (#4005)

mirjak <notifications@github.com> Tue, 18 August 2020 15:00 UTC

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From: mirjak <notifications@github.com>
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Subject: Re: [quicwg/base-drafts] Attempt to define slow start/congestion avoidance (#4005)
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@mirjak commented on this pull request.



> -Additive Increase Multiplicative Decrease (AIMD) approach that increases
-the congestion window by one maximum packet size per congestion window
-acknowledged.  When a loss or ECN-CE marking is detected, NewReno halves
-the congestion window, sets the slow start threshold to the new
-congestion window, and then enters the recovery period.
+The congestion controller is in congestion avoidance any time the congestion
+window is at or above the slow start threshold.
+
+Congestion avoidance uses an Additive Increase Multiplicative Decrease (AIMD)
+approach that increases the congestion window by one maximum packet size per
+congestion window acknowledged.
+
+When first entering congestion avoidance, when a packet is declared lost, or
+when the ECN-CE count is detected, the congestion controller halves the
+congestion window, reduces the slow start threshold to the resulting size, and
+enters the recovery period.

https://tools.ietf.org/html/rfc5681#section-4.3

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