Re: [AVTCORE] Is a source projecting middlebox part of Topo-Mixer?

Magnus Westerlund <magnus.westerlund@ericsson.com> Thu, 20 June 2013 08:41 UTC

Return-Path: <prvs=98839ac3d4=magnus.westerlund@ericsson.com>
X-Original-To: avt@ietfa.amsl.com
Delivered-To: avt@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 24ED421F9F5A for <avt@ietfa.amsl.com>; Thu, 20 Jun 2013 01:41:59 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -106.119
X-Spam-Level:
X-Spam-Status: No, score=-106.119 tagged_above=-999 required=5 tests=[AWL=0.130, BAYES_00=-2.599, HELO_EQ_SE=0.35, RCVD_IN_DNSWL_MED=-4, USER_IN_WHITELIST=-100]
Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id NsZ8q2+3HU7h for <avt@ietfa.amsl.com>; Thu, 20 Jun 2013 01:41:52 -0700 (PDT)
Received: from mailgw7.ericsson.se (mailgw7.ericsson.se [193.180.251.48]) by ietfa.amsl.com (Postfix) with ESMTP id 6166F21F9E4C for <avt@ietf.org>; Thu, 20 Jun 2013 01:41:51 -0700 (PDT)
X-AuditID: c1b4fb30-b7f9e6d000002643-10-51c2c04f7749
Received: from esessmw0237.eemea.ericsson.se (Unknown_Domain [153.88.253.125]) by mailgw7.ericsson.se (Symantec Mail Security) with SMTP id 07.41.09795.F40C2C15; Thu, 20 Jun 2013 10:41:51 +0200 (CEST)
Received: from [127.0.0.1] (153.88.115.8) by esessmw0237.eemea.ericsson.se (153.88.115.91) with Microsoft SMTP Server id 8.3.279.1; Thu, 20 Jun 2013 10:41:50 +0200
Message-ID: <51C2C058.3090900@ericsson.com>
Date: Thu, 20 Jun 2013 10:42:00 +0200
From: Magnus Westerlund <magnus.westerlund@ericsson.com>
User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:17.0) Gecko/20130509 Thunderbird/17.0.6
MIME-Version: 1.0
To: "Duckworth, Mark" <Mark.Duckworth@polycom.com>
References: <49E45C59CA48264997FEBFB29B6BC2D60146DF3E@CRPMBOXPRD07.polycom.com>
In-Reply-To: <49E45C59CA48264997FEBFB29B6BC2D60146DF3E@CRPMBOXPRD07.polycom.com>
X-Enigmail-Version: 1.5.1
Content-Type: text/plain; charset="ISO-8859-1"
Content-Transfer-Encoding: 8bit
X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprCLMWRmVeSWpSXmKPExsUyM+Jvra7/gUOBBsceCFi87FnJbrHuyFNm ByaPJUt+Mnm8eKAUwBTFbZOUWFIWnJmep2+XwJ2xdvcMloL7PBUN09tYGhhXcnUxcnJICJhI 7Ly6jAnCFpO4cG89WxcjF4eQwClGic/nl7JCOMsZJd49mskMUsUroC1x41QDO4jNIqAq0f37 PlicTcBC4uaPRjYQW1QgWOLI9s0sEPWCEidnPgGzRQSMJI6unwJUz8HBLKAoMaldEiQsLOAt 0bd3FxNIWEjAX2LfbguQMKdAgMSSzZ+gbpOU2PKiHWwrs4CexJSrLYwQtrxE89bZYBcIAV3W 0NTBOoFRaBaSxbOQtMxC0rKAkXkVI3tuYmZOern5JkZgoB7c8ttgB+Om+2KHGKU5WJTEeT+d 2hUoJJCeWJKanZpakFoUX1Sak1p8iJGJgxNEcEk1MDrMmt3xljPkNbtzZ+LM/JOmu77J+k7c Xv4r/4npmupfEqXX1W7FfnTnX6PSceHvCZ8jytIxs2/duVpRpjDRqTGklKnP7u6SG3oRSTLO MyZZFKnrqoQsUVPTXMrqVdK+58PXHlfx/z3Wu/TMl83ape3NoTPpl/K/vBk7jxxcLLjig1mI Uu2SZUosxRmJhlrMRcWJAOxrK+AnAgAA
Cc: "avt@ietf.org" <avt@ietf.org>
Subject: Re: [AVTCORE] Is a source projecting middlebox part of Topo-Mixer?
X-BeenThere: avt@ietf.org
X-Mailman-Version: 2.1.12
Precedence: list
List-Id: Audio/Video Transport Core Maintenance <avt.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/avt>, <mailto:avt-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/avt>
List-Post: <mailto:avt@ietf.org>
List-Help: <mailto:avt-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/avt>, <mailto:avt-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 20 Jun 2013 08:41:59 -0000

On 2013-06-14 15:50, Duckworth, Mark wrote:
> I have a question regarding draft-ietf-avtcore-rtp-topologies-update. 
> Is a source projecting middlebox part of Topo-Mixer?
>

Short answer: Probably not!

Longer answer below.

>  
> 
> Section 3.6 describes the Topo-Mixer category, with subsections
> describing the media mixing variety and the media switching variety.
> 
>  
> 
> Then section 3.7 describes a source projecting middlebox, but there is
> no Topo- designation for this case.  If the source projecting middlebox
> is a third variety of Topo-Mixer, then this section 3.7 should be
> renumbered as 3.6.3, to indicate it is part of 3.6 Topo-Mixer.  If the
> source projecting middlebox is not a variety of Topo-Mixer, then it
> should be given its own new Topo-Source-Projecting designation, and also
> added to the comparison in section 4.2.

I think it needs its own designation. The issue with source projecting
mixer is that it is a hybrid between translator and mixer. From certain
perspective it can be seen as a translator, for others it is much more
like a mixer.

I definitely want input on this matter.

Cheers

Magnus Westerlund

----------------------------------------------------------------------
Multimedia Technologies, Ericsson Research EAB/TVM
----------------------------------------------------------------------
Ericsson AB                | Phone  +46 10 7148287
Färögatan 6                | Mobile +46 73 0949079
SE-164 80 Stockholm, Sweden| mailto: magnus.westerlund@ericsson.com
----------------------------------------------------------------------