A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Audio/Video Transport Extensions Working Group of the IETF.
Title : Multicast Acquisition Report Block Type for RTP Control Protocol (RTCP) Extended Reports (XRs)
Author(s) : A. Begen, E. Friedrich
Filename : draft-ietf-avtext-multicast-acq-rtcp-xr-00.txt
Pages : 20
Date : 2011-03-05
In most RTP-based multicast applications, the RTP source sends inter-
related data. Due to this interdependency, randomly joining RTP
receivers usually cannot start consuming the multicast data right
after they join the session. Thus, they often experience a random
acquisition delay. One approach to reduce this delay is to receive a
burst stream from a retransmission server that facilitates rapid
acquisition of the multicast stream. An RTP receiver may use this
approach (or any other approach) to achieve rapid acquisition. Yet,
due to various factors, performance of the rapid acquisition methods
usually varies. Furthermore, in some cases the RTP receiver may (or
may have to) do a simple multicast join. For quality reporting,
monitoring and diagnostics purposes, it is important to collect
detailed information from the RTP receivers about their acquisition
and presentation experiences. This document addresses this issue by
defining a new report block type, called Multicast Acquisition (MA)
Report Block, within the framework of RTP Control Protocol (RTCP)
Extended Reports (XR) (RFC 3611). This document also defines the
necessary signaling of the new MA report block type in the Session
Description Protocol (SDP).
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