IETF Logo Mail Archive

Re: Multipath (was: Re: Re-chartering for extension work)

Ryan Hamilton <rch@google.com> Wed, 18 December 2019 22:43 UTC

Return-Path: <rch@google.com>
X-Original-To: quic@ietfa.amsl.com
Delivered-To: quic@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 28F6D120A7D for <quic@ietfa.amsl.com>; Wed, 18 Dec 2019 14:43:17 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -17.5
X-Spam-Level:
X-Spam-Status: No, score=-17.5 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIMWL_WL_MED=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, ENV_AND_HDR_SPF_MATCH=-0.5, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, USER_IN_DEF_DKIM_WL=-7.5, USER_IN_DEF_SPF_WL=-7.5] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=google.com
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id o5aJW-kIAOFN for <quic@ietfa.amsl.com>; Wed, 18 Dec 2019 14:43:15 -0800 (PST)
Received: from mail-wm1-x332.google.com (mail-wm1-x332.google.com [IPv6:2a00:1450:4864:20::332]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id A0DD0120077 for <quic@ietf.org>; Wed, 18 Dec 2019 14:43:15 -0800 (PST)
Received: by mail-wm1-x332.google.com with SMTP id 20so3540942wmj.4 for <quic@ietf.org>; Wed, 18 Dec 2019 14:43:15 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=CYEd/9pj4we5RbOiP4s7JtphlrQrNzHtW7F+cMZRc7o=; b=vajWUPDdpGR68/WcwHwAGaaQF4yhr6s5x8VXr9xwQ6tdYYn1iqCFPAaSdv7rLmhiDj z8snlEePM86YmTNdh/OEk9b7JBS6lJ2UYn0KMCsZilbbqthRKhOEs0AgLAFTQiu/aHt/ ERu4LTzzQS385J7ACUHvEDaytQla9He//CYLyOmdZTUWn6iXJ8myNd9pTS6V+b9FRUym LGQmpsowzoO+h946ST3azQ8UpxZ+bAIVGtqwopun3Fmetn50TcJo5A7YtHVi6FFffdy4 lrFacl2Dr9o5qTLxMlY1mN7RHY92QSPpr4v/OxlejbAspgFBn+Kv8oF3mQndvgvubQ7o wwGg==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=CYEd/9pj4we5RbOiP4s7JtphlrQrNzHtW7F+cMZRc7o=; b=uMsipTJZARknIhglmu5eYXNZ9jc5rr8dvAUbQKYmrOvavtrDxa5nshDeAAaU9XHzbX FJ12jGXVDfnssGXXZzWlQozVdTHyj5SMm6YngpgwU7GJNkgpB9Gx2d9wwOBjS8DMT3za BzNibNOoCNO4weTEpQWZLcRuuwpKYQJabBsQDnpZYKv/znZ2FfRz/ShIsmNaGMorvUx9 jlAeqiVrPko+eD6AXPgpgJsCy+tcVkRuxrgRWBpcaY8j24ihmpBjL3Azbp4ySD0Kb6In rCirKGPa4V0jK6q+0T7pOV6ujdOxtEceLJyOKDLhJDJcLVFRXNrHGpH4Nc9H7ODgWfov xHyQ==
X-Gm-Message-State: APjAAAVQezSe6Ij3DnDr8eEL99R4HDR8hFqAB3volUUVnnNseFefyWe9 s6nmKwYNGEts3i7+qPBe141DzlWP09QOgfw1SaZJUA==
X-Google-Smtp-Source: APXvYqwul+hEaONEXZt3kM+ohiXq45yEqdwqZxB2C9IbbYeoBJU3TiN+6/LlLKiUb6wL0uCB3slbKOHM8HGy4FbfmlE=
X-Received: by 2002:a1c:3c89:: with SMTP id j131mr6016577wma.34.1576708993615; Wed, 18 Dec 2019 14:43:13 -0800 (PST)
MIME-Version: 1.0
References: <A56547B6-2E3B-4ABE-8C9B-BA9ACC489FB2@mnot.net> <1E872371-F543-4822-8C11-05601913A72E@tessares.net> <752D0B90-8B29-4DBC-9B2F-09E834335598@eggert.org> <49366B32-6425-486C-9453-96D27E2E8EAE@tessares.net> <CAN1APdfNyMBzeWKVRQojo4W_mgxXSSwj4X4EvFC9Pfz4bZ+Pdg@mail.gmail.com> <DF4E42C3-3D90-4C68-989C-6B11833005F9@tessares.net> <CAN1APddWow_QBs+_6GRLyauWFrLVvcr7LA9Mjqdgw-Bcp0d=tQ@mail.gmail.com> <9bc43313-7a06-8b01-75ef-ff1c3925a6cc@huitema.net> <CACpbDccdpKHygp87Be-ytC7juYZmUrfh-3a=4ESLCWMfE-t6Ww@mail.gmail.com> <839F7E31-FB6A-4846-A3C4-C5539E14407E@tessares.net>
In-Reply-To: <839F7E31-FB6A-4846-A3C4-C5539E14407E@tessares.net>
From: Ryan Hamilton <rch@google.com>
Date: Wed, 18 Dec 2019 14:42:53 -0800
Message-ID: <CAJ_4DfT_riJr0n0KyD43iRZ+pmkqFiU3YPaTobZcLdqPJVUYYw@mail.gmail.com>
Subject: Re: Multipath (was: Re: Re-chartering for extension work)
To: Olivier Bonaventure <olivier.bonaventure@tessares.net>
Cc: Jana Iyengar <jri.ietf@gmail.com>, Quentin De Coninck <quentin.deconinck@uclouvain.be>, Mark Nottingham <mnot@mnot.net>, Christian Huitema <huitema@huitema.net>, Lars Eggert <lars@eggert.org>, Mikkel Fahnøe Jørgensen <mikkelfj@gmail.com>, IETF QUIC WG <quic@ietf.org>
Content-Type: multipart/alternative; boundary="0000000000007ae331059a022bfc"
Archived-At: <https://mailarchive.ietf.org/arch/msg/quic/KczVzO-N-n-TCdwVSo4md2zVKow>
X-BeenThere: quic@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Main mailing list of the IETF QUIC working group <quic.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/quic>, <mailto:quic-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/quic/>
List-Post: <mailto:quic@ietf.org>
List-Help: <mailto:quic-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/quic>, <mailto:quic-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 18 Dec 2019 22:43:17 -0000

On Wed, Dec 18, 2019 at 10:40 AM Olivier Bonaventure <
olivier.bonaventure@tessares.net> wrote:

> [snip]
>
> A second use case is for mobile devices that need to preserve connectivity
> while switching from one wireless network to another. When such a device
> detects another wireless network, it needs to bet whether migrating the
> connection to the new network would improve performance. With a multipath
> transport, there is no need to bet as the transport will automatically
> select the best performing network. Apple’s deployment of Multipath TCP is
> a good example of the benefits of such a multipath strategy.
>

FWIW, QUIC connection migration was designed to do explicitly this and has
been very successful in Google's deployment. I don't think this is a good
justification for multipath QUIC.

Cheers,

Ryan

v2.23.0 | Report a Bug | By Email