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Re: [Ecn-in-quic] ECN ACK, bytes or packets

"Eggert, Lars" <lars@netapp.com> Fri, 01 December 2017 10:23 UTC

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From: "Eggert, Lars" <lars@netapp.com>
To: Ingemar Johansson S <ingemar.s.johansson@ericsson.com>
CC: "ecn-in-quic@ietf.org" <ecn-in-quic@ietf.org>
Thread-Topic: [Ecn-in-quic] ECN ACK, bytes or packets
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Date: Fri, 01 Dec 2017 10:23:27 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/ecn-in-quic/G1_hfd8MVbHckvRqqTzrf9zFVWo>
Subject: Re: [Ecn-in-quic] ECN ACK, bytes or packets
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On 2017-12-1, at 11:02, Ingemar Johansson S <ingemar.s.johansson@ericsson.com> wrote:
> + If the two tweaks above are possible then we would end up with something like
>   + 1 byte for ECT(0), with the special 2 bit encoding we are then able to encode a delta of [0…63] ECT(0] marked packets
>   + 1 byte for ECT(1), same encoding as above.
>   + 2 or 4 bytes for CE, the most likely encoding that makes it possible to encode a delta of [0..16383] CE marked bytes or [0...2*30-1], the latter is more likely used with large MTU sizes and in some cases also when packets are densely marked (L4S)

We are going to varint encoding almost everywhere in QUIC; see https://quicwg.github.io/base-drafts/draft-ietf-quic-transport.html#rfc.section.8.1 <https://quicwg.github.io/base-drafts/draft-ietf-quic-transport.html#rfc.section.8.1>

Lars

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