Date: Tue, 12 Feb 2019 23:58:54 +0000 (UTC)
From: Martin Thomson <notifications@github.com>
Reply-To: quicwg/base-drafts
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Message-ID: <quicwg/base-drafts/pull/2455/review/202970942@github.com>
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Subject: Re: [quicwg/base-drafts] describe what happens when the PTO timer
 expires (#2455)
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martinthomson commented on this pull request.



> @@ -506,9 +506,10 @@ delay sending an acknowledgement.
 The PTO value MUST be set to at least kGranularity, to avoid the timer expiring
 immediately.
 
-When a PTO timer expires, the PTO period MUST be set to twice its current value.
-This exponential reduction in the sender's rate is important because the PTOs
-might be caused by loss of packets or acknowledgements due to severe congestion.
+When a PTO timer expires, the sender sends a probe packet as described in the

Or simply nothing.  A probe packet is sent if two packets are sent, and this is not normative text.

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<p><b>@martinthomson</b> commented on this pull request.</p>

<hr>

<p>In <a href="https://github.com/quicwg/base-drafts/pull/2455#discussion_r256198149">draft-ietf-quic-recovery.md</a>:</p>
<pre style='color:#555'>&gt; @@ -506,9 +506,10 @@ delay sending an acknowledgement.
 The PTO value MUST be set to at least kGranularity, to avoid the timer expiring
 immediately.
 
-When a PTO timer expires, the PTO period MUST be set to twice its current value.
-This exponential reduction in the sender&#39;s rate is important because the PTOs
-might be caused by loss of packets or acknowledgements due to severe congestion.
+When a PTO timer expires, the sender sends a probe packet as described in the
</pre>
<p>Or simply nothing.  A probe packet is sent if two packets are sent, and this is not normative text.</p>

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