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Re: [quicwg/base-drafts] Packet number echo with variable-length numbering (#391)

ianswett <notifications@github.com> Sat, 18 March 2017 00:55 UTC

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Date: Fri, 17 Mar 2017 17:53:41 -0700
From: ianswett <notifications@github.com>
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Subject: Re: [quicwg/base-drafts] Packet number echo with variable-length numbering (#391)
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@britram I think it's ok to provide an RTT measurement less frequently when little data is flowing.   The removal of STOP_WAITING and acking acks results in sending a retransmittable frame with an ack approximately once per RTT.   So both directions should get an RTT estimate approximately once per RTT.

@martinthomson Connections are typically bandwidth limited in one direction, but commonly not both.  We'd like to limit the overhead this adds, particularly on the bandwidth limited direction.  So putting it on every packet containing an ack is a reasonable compromise.

I'm still apprehensive about making this required in any way.  Past experience with exposing more information to the network has not been uniformly positive.

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