IETF Logo Mail Archive

Re: [V3] Centralized conference media

Justin Uberti <juberti@google.com> Fri, 27 March 2020 16:32 UTC

Return-Path: <juberti@google.com>
X-Original-To: v3@ietfa.amsl.com
Delivered-To: v3@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id ABBE13A08DB for <v3@ietfa.amsl.com>; Fri, 27 Mar 2020 09:32:59 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -17.599
X-Spam-Level:
X-Spam-Status: No, score=-17.599 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, DKIM_VALID_EF=-0.1, ENV_AND_HDR_SPF_MATCH=-0.5, HTML_MESSAGE=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001, USER_IN_DEF_DKIM_WL=-7.5, USER_IN_DEF_SPF_WL=-7.5] autolearn=unavailable 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 bOT-hhNuzmak for <v3@ietfa.amsl.com>; Fri, 27 Mar 2020 09:32:57 -0700 (PDT)
Received: from mail-vs1-xe30.google.com (mail-vs1-xe30.google.com [IPv6:2607:f8b0:4864:20::e30]) (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 72CFE3A17A1 for <v3@ietf.org>; Fri, 27 Mar 2020 09:28:28 -0700 (PDT)
Received: by mail-vs1-xe30.google.com with SMTP id a63so6552595vsa.8 for <v3@ietf.org>; Fri, 27 Mar 2020 09:28:28 -0700 (PDT)
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=lGXeg1a8pDbC1YI6i6aYV+XcPM4AFBtbPcjYTDy55U4=; b=iXXDUJa6ZXVeYBN4gabCfizEYlcBfM076NGHM7C0LDgKcj4P1BHvGysc2Hbnl8YgQl SiHntU2XU/mMxWBZCs81yO6GpoljJ+C6xhDK3RVAGITUNUwjCoK5WVkNqSG2Nc24k1p6 Bt8g7zaX81wlID7RMXr5bHKE06NhYM6wFe0tt0tsMCCkVsoIeSY4wCLZ7IqY8wEvgxDn q4NeF9gm2ZD6Rb3myneLDlwLMLunOofCSsEg/ylBjUrIsQDzAVajeIxqpoBdmMT2HVbN FzIIggg0x64VwR+Skakwl9tUtNSUZV9CYLRwUmI0iF/fmcy5YmFL5Wq/fk98z36Czktq lx2A==
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=lGXeg1a8pDbC1YI6i6aYV+XcPM4AFBtbPcjYTDy55U4=; b=jGoCZCYqdyOdv4paDWt3u5fLmTfhjjscrPCNoKyEnebZnWtFT1s1mfggk/uF1BtpuT GIFRTAXT3/tKP/ptrf1ovZ7T7KLHz/xYQlRbmqYj8/N4RebifamWRUPFRgnbqM8ihq5S iqBPclitPTyHw7vDCFP+z3WiKFgtD+ZHSMFDb6noHAu+AUllDdAOoO0h4AsUsN57rVio ZPgQ89KR19b6VQgMA5fKKHkAFuJVneU4EKhJ6t02z2+55oEqNKv+9A4Mulf28LJWX0Kj wIwuZVZVLb/RpONBzTZKbwHesKZM2GyeF2LL0NsR2MCF4hFzxQ4g8adbzQnUxSLh+5UQ Mdnw==
X-Gm-Message-State: ANhLgQ3F1xVp0hxFYryDao8T7avC9NmBNw5hQ0JwFK9P37crP9Lpgzve mklZvYxi7LnzGn241lVGbP9RipPVleKFzXPISzCfPDQE
X-Google-Smtp-Source: ADFU+vsy30LFFcVRLJYSbZlDYgLIhBxVa46lSyhu3W4EnqZAsm7jzdQILZPbksvMADIExbutX+No4AOlqsM/o6QCCAU=
X-Received: by 2002:a67:ec81:: with SMTP id h1mr10355767vsp.96.1585326506946; Fri, 27 Mar 2020 09:28:26 -0700 (PDT)
MIME-Version: 1.0
References: <3595789d7a8d24671250e2ca04fcf78eb04179a4.camel@ericsson.com> <43DAEFA6-7258-4477-8DD7-65B6FE7E1D5D@iii.ca>
In-Reply-To: <43DAEFA6-7258-4477-8DD7-65B6FE7E1D5D@iii.ca>
From: Justin Uberti <juberti@google.com>
Date: Fri, 27 Mar 2020 09:28:15 -0700
Message-ID: <CAOJ7v-37FPZa0aSabJVmdGvwVHJUA1itTz4r56PEVEuQksm10Q@mail.gmail.com>
To: Cullen Jennings <fluffy@iii.ca>
Cc: Magnus Westerlund <magnus.westerlund=40ericsson.com@dmarc.ietf.org>, "v3@ietf.org" <v3@ietf.org>
Content-Type: multipart/alternative; boundary="0000000000004d37c005a1d8978d"
Archived-At: <https://mailarchive.ietf.org/arch/msg/v3/DLYdvZxelYyXqXduSPg0-Lczuh0>
Subject: Re: [V3] Centralized conference media
X-BeenThere: v3@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: <v3.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/v3>, <mailto:v3-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/v3/>
List-Post: <mailto:v3@ietf.org>
List-Help: <mailto:v3-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/v3>, <mailto:v3-request@ietf.org?subject=subscribe>
X-List-Received-Date: Fri, 27 Mar 2020 16:33:00 -0000

I think Magnus is trying to establish the conference topology, which has
ramifications on how we want to handle things like RTCP.

One strawman could be to focus on RTCP-terminating SFUs, i.e., cementing
the notion that RIPT media flows are indeed point-to-point (i.e.,
client-to-SFU, as opposed to client-to-client1, client2, client3).

On Fri, Mar 27, 2020 at 9:11 AM Cullen Jennings <fluffy@iii.ca> wrote:

>
>
> On Mar 27, 2020, at 8:23 AM, Magnus Westerlund <
> magnus.westerlund=40ericsson.com@dmarc.ietf.org> wrote:
>
> I am also very worried that if the model for the media transport is only
> point
> to point calls then we get something that will become obsolete or at least
> need
> hacks immediately. This thing need to support centralized conferences with
> cascaded or meshed central media nodes. So I think it is cruical that one
> define
> the usage model with switched central nodes and have that in mind so that
> one
> can actually support the applications needed. I think by defining a strict
> model
> one can actually avoid a lot of feature creep in the media transport.
>
>
> I think it does make sense to support some meta data on a media flow for
> centralized conferencing support. What semantic level information do you
> think is needed in the media ?
>
>
>
> --
> V3 mailing list
> V3@ietf.org
> https://www.ietf.org/mailman/listinfo/v3
>

v2.23.0 | Report a Bug | By Email