Re: [quicwg/base-drafts] Restarting from idle (#2023)

[ianswett <[e-mail]>]

ianswett commented on this pull request.



> @@ -1040,6 +1040,24 @@ As an example of a well-known and publicly available implementation of a flow
 pacer, implementers are referred to the Fair Queue packet scheduler (fq qdisc)
 in Linux (3.11 onwards).
 
+## Resumption from idle
+
+A connection is idle if bytes in flight is 0 and there is nothing
+retransmittable to send.  This occurs when the connection is application
+limited and after a verified retransmission timeout.  In order to limit the
+size of bursts sent into the network, the behavior when restarting from idle
+depends upon whether pacing is used.
+
+If pacing is used, the connection should limit the initial burst of packets to
+no more than the initial congestion window and subsequent packets SHOULD be
+paced. The congestion window does not change while the connection is idle.

If the goal is to reduce bursts, I think we need to advocate for limiting the burst of a paced connection to nothing larger than the restarting window of an unpaced connection.

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