Re: [quicwg/base-drafts] Add some MUSTs to congestion control (#3978)

[mirjak <[e-mail]>]

@mirjak commented on this pull request.



> -during the recovery period is acknowledged.  This is slightly different from
-TCP's definition of recovery, which ends when the lost packet that started
-recovery is acknowledged.
+A NewReno sender enters the recovery period when it detects loss or an ECN-CE
+mark is received. A recovery period ends when a packet sent during the recovery
+period is acknowledged.
+
+A sender that is already in a recovery period stays in it and does not re-enter
+it.
+
+On entering recovery, a sender MUST do the following:
+
+* set the slow start threshold to half the value of the congestion window at the
+  moment that loss is detected, and
+
+* set the congestion window to the new value of the slow start

This still say that you have to set the cwnd to ssthresh when entering recovery. Saying that you have to do this when entering recovery and then saying that you may do it it later seems confusing.

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