Subject: [AVT] FW: New Version Notification for draft-yang-avt-switch-multicast-short-timeshift-00

From: Peilin YANG <[email-masked]>
Date: Fri, 22 Oct 2010 09:50:00 +0800

Hi,

Please check the attached -00 draft on "Switching from unicast to multicast for multicast short time-shift". Also, URI is as below:
http://www.ietf.org/id/draft-yang-avt-switch-multicast-short-timeshift-00.txt

Any comments are welcome. 

Best regards,

Peilin

----- 原邮件 -----
发件人: IETF I-D Submission Tool <[email-masked]>
日期: 星期一, 十月 18日, 2010 下午4:37
主题: New Version Notification for draft-yang-avt-switch-multicast-short-timeshift-00
收件人: [email-masked]
抄送: [email-masked], [email-masked], [email-masked], [email-masked]

A new version of I-D, draft-yang-avt-switch-multicast-short-timeshift-00.txt has been successfully submitted by Peilin Yang and posted to the IETF repository.

Filename:         draft-yang-avt-switch-multicast-short-timeshift
Revision:         00
Title:                 Switching from unicast to multicast for multicast short time-shift
Creation_date:         2010-10-18
WG ID:                 Independent Submission
Number_of_pages: 11

Abstract:
When a client requests a time-shift service for a multicast session
using RTP for media transport, like pause, instant replay, slow-
motion video, frame-by-frame viewing, rewind, fast-forward, etc., it
needs to switch from multicast session to unicast session.  This
unicast session will always serve for the time-shift service unless
the client manually switches back to the multicast session.  Actually
a time- shift request may happens for all clients.  That is,
multicast session stream will be replaced by many unicast time-shift
streams having significant impact on network bandwidth usage.

In this document, we describe a method using existing RTP and RTCP
protocol infrastructure that switches back to multicast session from
unicast session of time-shift.  In this method, a burst RTP flow
which is a little faster than the primary multicast rate may be
transmitted so that unicast session may catch up and switch back to
multicast session.

The IETF Secretariat.