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Re: More context on ATSSS use case

Lucas Pardue <lucaspardue.24.7@gmail.com> Mon, 26 October 2020 13:01 UTC

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From: Lucas Pardue <lucaspardue.24.7@gmail.com>
Date: Mon, 26 Oct 2020 13:00:50 +0000
Message-ID: <CALGR9oYcEfDuqFTvKLC+a8AfKbHCPGYzF5uicPwxMvfU3uwMfQ@mail.gmail.com>
Subject: Re: More context on ATSSS use case
To: "Flinck, Hannu (Nokia - FI/Espoo)" <hannu.flinck@nokia-bell-labs.com>
Cc: Florin Baboescu <florin.baboescu=40broadcom.com@dmarc.ietf.org>, David Schinazi <dschinazi.ietf@gmail.com>, Mirja Kuehlewind <mirja.kuehlewind@ericsson.com>, "quic@ietf.org" <quic@ietf.org>
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On Mon, 26 Oct 2020, 12:49 Flinck, Hannu (Nokia - FI/Espoo), <
hannu.flinck@nokia-bell-labs.com> wrote:

> Hello Lucas
>
>
>
> No, there are multiple QUIC connections (multipath!). Please see slide #5
> in
>
>
> https://github.com/quicwg/wg-materials/blob/master/interim-20-10/Multipath%20in%203GPP%20ATSSS.pdf
>
>
>
> Bulk data and low-latency are kept separate. Each QoS flow has its own
> connection.
>
>
>

I'm not talking about the ATSSS tunnel part. I'm saying, when a QUIC client
and server want to multiplex different kinds of traffic in the same
connection, the transport let them do that using streams and datagrams with
application-specific scheduling.

I don't see an answer for how ATSSS can distinguish the different traffic
in end-to-end QUIC. So I don't see how it can select the different paths
that it knows about but the endpoints don't.

If the answer is something like "keep your different traffic on different
end-to-end connections." then that is a very sorry state of affairs and
undoes many benefits. So I'm hoping there is something I'm missing.

Cheers
Lucas


>

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