[SAM] New Version Notification for draft-sunzhigang-sam-labelcast-02.txt
zhigang sun <sunzhigang.nudt@gmail.com> Thu, 14 July 2011 05:36 UTC
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Date: Thu, 14 Jul 2011 13:36:54 +0800
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From: zhigang sun <sunzhigang.nudt@gmail.com>
To: sam@irtf.org
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Subject: [SAM] New Version Notification for draft-sunzhigang-sam-labelcast-02.txt
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Hello everyone, We have undated labelcast draft according to the questions and advices in last IETF meeting. The main change include: (1) Labelcast does not exclude RTP/RTCP. RTP/RTCP is an excellent protocol for multimedia data transportatiaphy on and RTCP based feedback can not only provide receiver's QoE information, but also support network tomography that can deduce network status(but not real time). Labelcast replaces or updates the UDP header, It can implement three functions using its 8 byte header. Application mux/dex, in-network measurement and label-based multicast forwarding control. (2)labelcast can coexist with IP multicast Charter of sam says "new protocols are expected to coexist and integrate with native IP multicast protocols while offering more flexible deployment options and scaling to support a greater number of simultaneous multicast groups." So we consider labelcast can coexist with ip multicast or it is a supplement to IP multicast. Multicast control table(or labelcast table) is configured by external controllers while IP multicast FIB is generated by existing routing protocols. I think it is more like openflow. Labelcast provide a policy interface to outside of network devices. But how to generate labelcast table by a outside controller and the management interface define of labelcast is beyond this draft. (3)labelcast deployment problem is discussed We discuss its relationship to "common API", and use IP tunnel and gateways to implement incremental deployment. We suppose application developments are based on common API, and middleware on the sender host can encapsulate payload into labelcast packet and vice versa at the receiver end. Any comments is welcome on the list, and we hope to get more feedback in the meeting. Best Regards. Sun zhigang -----邮件原件----- 发件人: internet-drafts@ietf.org [mailto:internet-drafts@ietf.org] 发送时间: 2011年7月12日7:23 收件人: sunzhigang@263.net 抄送: sunzhigang@nudt.edu.cn; wanghuinudt@gmail.com; sunzhigang@263.net; taoli.nudt@gmail.com; mjn198812@sina.com 主题: New Version Notification for draft-sunzhigang-sam-labelcast-02.txt A new version of I-D, draft-sunzhigang-sam-labelcast-02.txt has been successfully submitted by Zhigang Sun and posted to the IETF repository. Filename: draft-sunzhigang-sam-labelcast Revision: 02 Title: Labelcast Protocol Creation date:2011-07-12 WG ID: Individual Submission Number of pages: 15 Abstract: This document presents a lightweight transport protocol-Labelcast, especially for long-lived connection video streams. This protocol provides a procedure for application programs to send media data to other programs. Like the UDP protocol, the Labelcast does not provide delivery and duplicate protection. However, it provides efficient support for the monitoring of video transmission quality. And, fast forwarding mechanism based on label is also supported by the protocol. Labelcast can coexist and integrate with existing mechanisms, such as IP multicast and RTP/RTCP, while offering more flexible deployment options and scaling to support a greater number of simultaneous multicast groups. The IETF Secretariat