Re: [xrblock] WGLC on draft-ietf-xrblock-rtcp-xr-synchronization-02.txt
"Huangyihong (Rachel)" <rachel.huang@huawei.com> Mon, 11 March 2013 02:25 UTC
Return-Path: <rachel.huang@huawei.com>
X-Original-To: xrblock@ietfa.amsl.com
Delivered-To: xrblock@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id B294821F881A for <xrblock@ietfa.amsl.com>; Sun, 10 Mar 2013 19:25:24 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -4.328
X-Spam-Level:
X-Spam-Status: No, score=-4.328 tagged_above=-999 required=5 tests=[AWL=-2.271, BAYES_00=-2.599, CN_BODY_35=0.339, MIME_BASE64_TEXT=1.753, MIME_CHARSET_FARAWAY=2.45, RCVD_IN_DNSWL_MED=-4]
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 AJAFvUGgObOV for <xrblock@ietfa.amsl.com>; Sun, 10 Mar 2013 19:25:23 -0700 (PDT)
Received: from lhrrgout.huawei.com (lhrrgout.huawei.com [194.213.3.17]) by ietfa.amsl.com (Postfix) with ESMTP id 2B99821F8970 for <xrblock@ietf.org>; Sun, 10 Mar 2013 19:25:22 -0700 (PDT)
Received: from 172.18.7.190 (EHLO lhreml203-edg.china.huawei.com) ([172.18.7.190]) by lhrrg02-dlp.huawei.com (MOS 4.3.5-GA FastPath queued) with ESMTP id APF15824; Mon, 11 Mar 2013 02:25:19 +0000 (GMT)
Received: from LHREML402-HUB.china.huawei.com (10.201.5.241) by lhreml203-edg.huawei.com (172.18.7.221) with Microsoft SMTP Server (TLS) id 14.1.323.7; Mon, 11 Mar 2013 02:24:52 +0000
Received: from NKGEML404-HUB.china.huawei.com (10.98.56.35) by lhreml402-hub.china.huawei.com (10.201.5.241) with Microsoft SMTP Server (TLS) id 14.1.323.7; Mon, 11 Mar 2013 02:25:18 +0000
Received: from NKGEML501-MBS.china.huawei.com ([169.254.2.126]) by nkgeml404-hub.china.huawei.com ([10.98.56.35]) with mapi id 14.01.0323.007; Mon, 11 Mar 2013 10:25:11 +0800
From: "Huangyihong (Rachel)" <rachel.huang@huawei.com>
To: "Romascanu, Dan (Dan)" <dromasca@avaya.com>, Shida Schubert <shida@ntt-at.com>, xrblock <xrblock@ietf.org>
Thread-Topic: [xrblock] WGLC on draft-ietf-xrblock-rtcp-xr-synchronization-02.txt
Thread-Index: AQHODvKrpUHfv3aWaE+V3yJSVfU7YJiZtP4AgAYqKSA=
Date: Mon, 11 Mar 2013 02:25:11 +0000
Message-ID: <51E6A56BD6A85142B9D172C87FC3ABBB4572A775@nkgeml501-mbs.china.huawei.com>
References: <00B2102B-B085-40EB-BA98-ACFDC4F2E82C@ntt-at.com> <9904FB1B0159DA42B0B887B7FA8119CA0A25C9@AZ-FFEXMB04.global.avaya.com>
In-Reply-To: <9904FB1B0159DA42B0B887B7FA8119CA0A25C9@AZ-FFEXMB04.global.avaya.com>
Accept-Language: zh-CN, en-US
Content-Language: zh-CN
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
x-originating-ip: [10.47.133.163]
Content-Type: text/plain; charset="gb2312"
Content-Transfer-Encoding: base64
MIME-Version: 1.0
X-CFilter-Loop: Reflected
Subject: Re: [xrblock] WGLC on draft-ietf-xrblock-rtcp-xr-synchronization-02.txt
X-BeenThere: xrblock@ietf.org
X-Mailman-Version: 2.1.12
Precedence: list
List-Id: Metric Blocks for use with RTCP's Extended Report Framework working group discussion list <xrblock.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/xrblock>, <mailto:xrblock-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/xrblock>
List-Post: <mailto:xrblock@ietf.org>
List-Help: <mailto:xrblock-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/xrblock>, <mailto:xrblock-request@ietf.org?subject=subscribe>
X-List-Received-Date: Mon, 11 Mar 2013 02:25:24 -0000
Hi Dan, Sorry for the late reply. Please see inline. Best regards Rachel -----邮件原件----- 发件人: xrblock-bounces@ietf.org [mailto:xrblock-bounces@ietf.org] 代表 Romascanu, Dan (Dan) 发送时间: 2013年3月7日 20:09 收件人: Shida Schubert; xrblock 主题: Re: [xrblock] WGLC on draft-ietf-xrblock-rtcp-xr-synchronization-02.txt Hi, Please find below my comments: 1. Are the Initial Synchronization Delay and the Synchronization Offset new metrics introduced by this draft? So it seems, as in section 2.1 the mention to the Initial Synchronization Delay has a reference to RFC 6051, but there is no metric definition there, while the explanation about the Synchronization Offset seems to include a self-contained definition. In this case I believe that the guidelines of using the template in RFC 6390 applies, and section 2.1 must be re-written on these lines. 2. Section 1.4 introduces the term of 'layered video sessions' which is used for the rest of the draft, with a reference to RFC 6190. However, RFC 6190 does not include or ever mentions 'layered video sessions' but rather 'layered multicast'. If this is the same term please mention this, or explain the relation. [Rachel]: Good catch. How about changing to "layered encodings"? 3. In section 3.2: > It is recommended that the beginning of multimedia session is chosen as the time when the receiver has joined the first RTP session of the multimedia session. Should not be RECOMMENDED (capitalized)? [Rachel]: Right. It should be capitalized. Thanks. 4. Same comment for the two instances of 'recommended in Section 4: > For multimedia session with multiple media types (e.g., audio and video), it is recommended to choose the stream with the lower bandwidth as the reference stream. For layered video sessions, it is recommended to use the base layer stream as the reference stream. [Rachel]: Okay. 5. The Security Considerations section mentions that > The new RTCP XR report blocks proposed in this document introduces no new security considerations beyond those described in [RFC3611]. However, the text in the Security Consideration section of RFC 3611 was refering only to voice calls carried by RTP: > The VoIP Metrics Report Block provides information on the quality of ongoing voice calls. Though such information might be carried in an application specific format in standard RTP sessions, making it available in a standard format here makes it more available to potential eavesdroppers. A supplementary statement should mention the fact that the extended report blocks defined by this document provide information not only about outgoing voice calls but als about other RTP applications like video sessions and multimedia sessions. Making available information about this applications in a standard format is also a potential security concern. [Rachel]: Okay. Will add this. Regards, Dan > -----Original Message----- > From: xrblock-bounces@ietf.org [mailto:xrblock-bounces@ietf.org] On > Behalf Of Shida Schubert > Sent: Wednesday, February 20, 2013 12:44 AM > To: xrblock > Subject: [xrblock] WGLC on draft-ietf-xrblock-rtcp-xr-synchronization- > 02.txt > > This is an announcement of a 2 weeks XRBLOCK WG last call on "Report > Block for Synchronization Delay and Offset Metrics Reporting" > priorto requesting publication of the document as a proposed standard. > > Please send your comments, including nits, to the list by the > > 8th of March (Just before the next IETF meeting in Orlando) > > If you read the draft and you see no issues, concerns, or nits, please > express the fact that you have no issue progressing the draft on the > list as well. > > The latest version can be found here: > > http://www.ietf.org/id/draft-ietf-xrblock-rtcp-xr-synchronization-02.txt > > Regards > > Shida as co-chair > _______________________________________________ > xrblock mailing list > xrblock@ietf.org > https://www.ietf.org/mailman/listinfo/xrblock _______________________________________________ xrblock mailing list xrblock@ietf.org https://www.ietf.org/mailman/listinfo/xrblock
- [xrblock] WGLC on draft-ietf-xrblock-rtcp-xr-sync… Shida Schubert
- Re: [xrblock] WGLC on draft-ietf-xrblock-rtcp-xr-… Roni Even
- Re: [xrblock] WGLC on draft-ietf-xrblock-rtcp-xr-… Kevin Gross
- Re: [xrblock] WGLC on draft-ietf-xrblock-rtcp-xr-… Claire Bi(jiayu)
- Re: [xrblock] WGLC on draft-ietf-xrblock-rtcp-xr-… Colin Perkins
- Re: [xrblock] WGLC on draft-ietf-xrblock-rtcp-xr-… Mario Montagud Climent
- Re: [xrblock] WGLC on draft-ietf-xrblock-rtcp-xr-… Romascanu, Dan (Dan)
- Re: [xrblock] WGLC on draft-ietf-xrblock-rtcp-xr-… Huangyihong (Rachel)
- [xrblock] 答复: WGLC on draft-ietf-xrblock-rtcp-xr-… Qin Wu
- Re: [xrblock] WGLC on draft-ietf-xrblock-rtcp-xr-… Romascanu, Dan (Dan)
- [xrblock] 答复: WGLC on draft-ietf-xrblock-rtcp-xr-… Qin Wu