Re: [quicwg/base-drafts] Recovery: when PTO expires and no data to send (#3286)

ianswett <notifications@github.com> Thu, 05 December 2019 22:05 UTC

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Subject: Re: [quicwg/base-drafts] Recovery: when PTO expires and no data to send (#3286)
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This exponential backoff of PING packets is less wasteful than a TCP RTO, since in TCP one can't decide not to retransmit data that was previously sent.  It's also an edge case which rarely occurs in practice.

In order to detect persistent congestion correctly, you'll likely need to send multiple PINGs in this case.

Given the above, I'm happy with the current algorithm.

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