Re: [quicwg/base-drafts] Persistent Congestion Time Threshold (#2365)

Nick Banks <notifications@github.com> Mon, 28 January 2019 23:44 UTC

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Subject: Re: [quicwg/base-drafts] Persistent Congestion Time Threshold (#2365)
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nibanks commented on this pull request.



> @@ -1003,15 +1003,21 @@ packets might cause the sender's bytes in flight to exceed the congestion window
 until an acknowledgement is received that establishes loss or delivery of
 packets.
 
-When an ACK frame is received that establishes loss of all in-flight packets
-sent prior to a threshold number of consecutive PTOs (pto_count is more than
-kPersistentCongestionThreshold, see {{cc-consts-of-interest}}), the network is
-considered to be experiencing persistent congestion, and the sender's congestion
-window MUST be reduced to the minimum congestion window (kMinimumWindow).  This
-response of collapsing the congestion window on persistent congestion is
-functionally similar to a sender's response on a Retransmission Timeout (RTO) in
-TCP {{RFC5681}}.
-
+## Persistent Congestion
+
+The network is considered to be experiencing persistent congestion when the

I'm not sure how we'd update the pseudocode to indicate loss of all packets. I'd have to think a bit more about it.

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