RTP Multiplexing Architecture
draft-westerlund-avtcore-multiplex-architecture-01

The information below is for an old version of the document
Document Type Active Internet-Draft (individual)
Last updated 2012-03-12
Replaced by draft-ietf-avtcore-multiplex-guidelines
Stream (None)
Intended RFC status (None)
Formats plain text pdf html bibtex
Stream Stream state (No stream defined)
Consensus Boilerplate Unknown
RFC Editor Note (None)
IESG IESG state I-D Exists
Telechat date
Responsible AD (None)
Send notices to (None)
Network Working Group                                      M. Westerlund
Internet-Draft                                                 B. Burman
Intended status: Informational                                  Ericsson
Expires: September 13, 2012                                   C. Perkins
                                                   University of Glasgow
                                                          March 12, 2012

                     RTP Multiplexing Architecture
           draft-westerlund-avtcore-multiplex-architecture-01

Abstract

   Real-time Transport Protocol is a flexible protocol possible to use
   in a wide range of applications and network and system topologies.
   This flexibility and the implications of different choices should be
   understood by any application developer using RTP.  To facilitate
   that understanding, this document contains an in-depth discussion of
   the usage of RTP's multiplexing points; the RTP session, the
   Synchronization Source Identifier (SSRC), and the payload type.  The
   focus is put on the first two, trying to give guidance and source
   material for an analysis on the most suitable choices for the
   application being designed.

Status of this Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on September 13, 2012.

Copyright Notice

   Copyright (c) 2012 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents

Westerlund, et al.     Expires September 13, 2012               [Page 1]
Internet-Draft        RTP Multiplexing Architecture           March 2012

   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  4
   2.  Definitions  . . . . . . . . . . . . . . . . . . . . . . . . .  5
     2.1.  Requirements Language  . . . . . . . . . . . . . . . . . .  5
     2.2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . .  5
   3.  RTP Multiplex Points . . . . . . . . . . . . . . . . . . . . .  6
     3.1.  Session  . . . . . . . . . . . . . . . . . . . . . . . . .  6
     3.2.  SSRC . . . . . . . . . . . . . . . . . . . . . . . . . . .  7
     3.3.  CSRC . . . . . . . . . . . . . . . . . . . . . . . . . . .  9
     3.4.  Payload Type . . . . . . . . . . . . . . . . . . . . . . .  9
   4.  Multiple Streams Alternatives  . . . . . . . . . . . . . . . . 10
   5.  RTP Topologies and Issues  . . . . . . . . . . . . . . . . . . 11
     5.1.  Point to Point . . . . . . . . . . . . . . . . . . . . . . 12
       5.1.1.  RTCP Reporting . . . . . . . . . . . . . . . . . . . . 12
       5.1.2.  Compound RTCP Packets  . . . . . . . . . . . . . . . . 13
     5.2.  Point to Multipoint Using Multicast  . . . . . . . . . . . 13
     5.3.  Point to Multipoint Using an RTP Translator  . . . . . . . 15
     5.4.  Point to Multipoint Using an RTP Mixer . . . . . . . . . . 16
     5.5.  Point to Multipoint using Multiple Unicast flows . . . . . 17
     5.6.  De-composite End-Point . . . . . . . . . . . . . . . . . . 18
   6.  Multiple Streams Discussion  . . . . . . . . . . . . . . . . . 19
     6.1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . 19
     6.2.  RTP/RTCP Aspects . . . . . . . . . . . . . . . . . . . . . 19
       6.2.1.  The RTP Specification  . . . . . . . . . . . . . . . . 19
       6.2.2.  Handling Varying sets of Senders . . . . . . . . . . . 22
       6.2.3.  Cross Session RTCP Requests  . . . . . . . . . . . . . 22
       6.2.4.  Binding Related Sources  . . . . . . . . . . . . . . . 22
       6.2.5.  Forward Error Correction . . . . . . . . . . . . . . . 24
       6.2.6.  Transport Translator Sessions  . . . . . . . . . . . . 25
     6.3.  Interworking . . . . . . . . . . . . . . . . . . . . . . . 25
Show full document text