Re: [quicwg/base-drafts] Rework section on persistent congestion (#3961)

[Jana Iyengar <[e-mail]>]

@janaiyengar commented on this pull request.



> +
+This design does not use consecutive PTO events to establish persistent
+congestion, since a PTO expiration is controlled by application patterns in
+addition to network activity. For example, a sender that sends small amounts of
+data with silence periods between them restarts the PTO timer every time it
+sends, potentially preventing the PTO timer from expiring for a long period of
+time, even when no acknowledgments are being received. The use of a duration
+enables a sender to establish persistent congestion without depending on the
+occurrence of PTOs.
+
+### Establishing Persistent Congestion
+
+A sender establishes persistent congestion on receiving an acknowledgement, if
+the following conditions are true:
+
+* a prior RTT sample exists;

You're right -- but this was not resolved correctly. I've changed the language now to match what's in the draft as you proposed, and I've filed #3972.

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