[quicwg/base-drafts] Define idle period for congestion control (#2555)

Praveen Balasubramanian <notifications@github.com> Tue, 26 March 2019 13:30 UTC

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Date: Tue, 26 Mar 2019 13:30:50 +0000 (UTC)
From: Praveen Balasubramanian <notifications@github.com>
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Subject: [quicwg/base-drafts] Define idle period for congestion control (#2555)
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Currently the recovery draft 19 requires the sender to either reducing the cwnd to initial cwnd OR pace the send after idle. Idle is defined as "it ceases to send data and has no bytes in
   flight" . This will mean that just a very small delay in the sending application thread will cause QUIC to reset its cwnd when not pacing. IMO we need to define an interval for this which could be a function of kGranularity or as PTO. FWIW in TCP the idle period for cwnd restart is defined as one retransmission timeout (reference https://tools.ietf.org/html/rfc5681 Section 4.1). 

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