Return-Path: X-Original-To: mmusic@ietfa.amsl.com Delivered-To: mmusic@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 0F3F21B4539 for ; Tue, 13 Oct 2015 07:47:07 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -113.911 X-Spam-Level: X-Spam-Status: No, score=-113.911 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, J_CHICKENPOX_21=0.6, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_DEF_DKIM_WL=-7.5, USER_IN_WHITELIST=-100] autolearn=ham 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 6fKGEPRl6lxG for ; Tue, 13 Oct 2015 07:47:06 -0700 (PDT) Received: from rcdn-iport-5.cisco.com (rcdn-iport-5.cisco.com [173.37.86.76]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id A8D421B453B for ; Tue, 13 Oct 2015 07:47:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=867; q=dns/txt; s=iport; t=1444747625; x=1445957225; h=from:to:cc:subject:date:message-id:references: in-reply-to:content-id:content-transfer-encoding: mime-version; bh=NRyqUhvIjj10p+127l/XzjnOrqyDRV0Sm9bb7megVB8=; b=AFca2mRTeEYNYOJtlHs3z1KXdooavzdQpdJbM4hc8C+ZoDLG0JzpTSr7 v5eB55npm/HWyzavWd501E4vrWY5gr7NVemmeiTn1NRoAD1N0S219Qfi6 5wAHr5IFflD/W3Np0aSW26FFdxnfY++XQnAQoc7NqQzDyEO+6XxDt+BaM g=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A0BXAgCBGB1W/4wNJK1egyaBQga5a4QiAQ2BWoMTggp/AoE/OBQBAQEBAQEBgQqEJgEBAQMBOj8FCwIBCBgeEDIlAgQOBRuICwjBSAEBAQEBAQEBAQEBAQEBAQEBAQEBAReJBYJuhEIYMweDGoEUAQSWFgGNGQWcAgEfAQFChAJxhWuBBgEBAQ X-IronPort-AV: E=Sophos;i="5.17,678,1437436800"; d="scan'208";a="37188439" Received: from alln-core-7.cisco.com ([173.36.13.140]) by rcdn-iport-5.cisco.com with ESMTP; 13 Oct 2015 14:47:04 +0000 Received: from XCH-ALN-005.cisco.com (xch-aln-005.cisco.com [173.36.7.15]) by alln-core-7.cisco.com (8.14.5/8.14.5) with ESMTP id t9DEl4Y1008649 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=FAIL); Tue, 13 Oct 2015 14:47:04 GMT Received: from xch-aln-004.cisco.com (173.36.7.14) by XCH-ALN-005.cisco.com (173.36.7.15) with Microsoft SMTP Server (TLS) id 15.0.1104.5; Tue, 13 Oct 2015 09:46:51 -0500 Received: from xch-aln-004.cisco.com ([173.36.7.14]) by XCH-ALN-004.cisco.com ([173.36.7.14]) with mapi id 15.00.1104.000; Tue, 13 Oct 2015 09:46:51 -0500 From: "Cullen Jennings (fluffy)" To: Bo Burman Thread-Topic: [MMUSIC] I-D Action: draft-ietf-mmusic-sdp-simulcast-02.txt Thread-Index: AQHRBcX+fWd7quHJ6EGa8XUGqbY5Cg== Date: Tue, 13 Oct 2015 14:46:51 +0000 Message-ID: References: <20151006180954.4556.83199.idtracker@ietfa.amsl.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.20.249.165] Content-Type: text/plain; charset="us-ascii" Content-ID: <2DBE0A5C2263E540AB0599AC91644027@emea.cisco.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Archived-At: Cc: "mmusic@ietf.org" Subject: Re: [MMUSIC] I-D Action: draft-ietf-mmusic-sdp-simulcast-02.txt X-BeenThere: mmusic@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Multiparty Multimedia Session Control Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 13 Oct 2015 14:47:07 -0000 > On Oct 7, 2015, at 8:59 AM, Bo Burman wrote: >=20 > 3) With the chosen approach (only defining simulcast on SDP media level),= it is not possible to spread simulcast streams onto different media transp= orts, thus also making it impossible to use different flow-based QoS I don't think that not quite right.=20 We can send within in the same AF4x family on the same congestion context. = So the one video stream could be AF42 and one could be AF41 (or AF43), but = we could not have one be AF43 and the other be CS1 when they are in the sam= e reliable transport protocol (like over the same TCP connection to a TURN = server). =20 Full details can be found in draft-ietf-dart-dscp-rtp-10 but basically I th= ink this solution does allow enough flexibility for different QoS for the d= ifferent layers in many cases.