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

Martin Thomson <> Thu, 20 August 2020 00:18 UTC

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Date: Wed, 19 Aug 2020 17:17:59 -0700
From: Martin Thomson <>
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Subject: Re: [quicwg/base-drafts] Attempt to define slow start/congestion avoidance (#4005)
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@martinthomson 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.

Yes.  This PR is intended to be a strictly editorial conversion.  I hope that I have faithfully translated the text from #3978.

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