Multiplexing Negotiation Using Session Description Protocol (SDP) Port Numbers
draft-ietf-mmusic-sdp-bundle-negotiation-05

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Document Type Active Internet-Draft (mmusic WG)
Last updated 2013-10-14
Replaces draft-holmberg-mmusic-sdp-bundle-negotiation
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MMUSIC Working Group                                         C. Holmberg
Internet-Draft                                                  Ericsson
Intended status: Standards Track                           H. Alvestrand
Expires: April 17, 2014                                           Google
                                                             C. Jennings
                                                                   Cisco
                                                        October 14, 2013

 Multiplexing Negotiation Using Session Description Protocol (SDP) Port
                                Numbers
            draft-ietf-mmusic-sdp-bundle-negotiation-05.txt

Abstract

   This specification defines a new SDP Grouping Framework extension,
   "BUNDLE", that can be used with the Session Description Protocol
   (SDP) Offer/Answer mechanism to negotiate the usage of bundled media,
   which refers to the usage of a single 5-tuple for media associated
   with multiple SDP media descriptions ("m=" lines).

Status of This Memo

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   This Internet-Draft will expire on April 17, 2014.

Copyright Notice

   Copyright (c) 2013 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
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   (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

Holmberg, et al.         Expires April 17, 2014                 [Page 1]
Internet-Draft                Bundled media                 October 2013

   to this document.  Code Components extracted from this document must
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Conventions . . . . . . . . . . . . . . . . . . . . . . . . .   5
   4.  Applicability Statement . . . . . . . . . . . . . . . . . . .   5
   5.  SDP Grouping Framework BUNDLE Extension Semantics . . . . . .   5
   6.  SDP Offer/Answer Procedures . . . . . . . . . . . . . . . . .   5
     6.1.  General . . . . . . . . . . . . . . . . . . . . . . . . .   5
     6.2.  Bundled SDP Information . . . . . . . . . . . . . . . . .   5
       6.2.1.  General . . . . . . . . . . . . . . . . . . . . . . .   5
       6.2.2.  Bandwidth (b=)  . . . . . . . . . . . . . . . . . . .   6
       6.2.3.  rtcp-mux Attribute  . . . . . . . . . . . . . . . . .   6
       6.2.4.  rtcp Attribute  . . . . . . . . . . . . . . . . . . .   6
       6.2.5.  DTLS-SRTP fingerprint Attribute . . . . . . . . . . .   6
       6.2.6.  SDES crypto Attribute . . . . . . . . . . . . . . . .   6
       6.2.7.  Other Attributes (a=) . . . . . . . . . . . . . . . .   6
     6.3.  RFC 5888 restrictions . . . . . . . . . . . . . . . . . .   6
     6.4.  SDP Offerer Procedures  . . . . . . . . . . . . . . . . .   7
       6.4.1.  General . . . . . . . . . . . . . . . . . . . . . . .   7
       6.4.2.  Request BUNDLE address selection  . . . . . . . . . .   8
       6.4.3.  Bundle Address Synchronization (BAS)  . . . . . . . .   8
       6.4.4.  Adding a media description to a BUNDLE group  . . . .   8
       6.4.5.  Moving A Media Description Out Of A BUNDLE Group  . .   9
       6.4.6.  Disabling A Media Description In A BUNDLE Group . . .   9
     6.5.  SDP Answerer Procedures . . . . . . . . . . . . . . . . .   9
       6.5.1.  Offerer Bundle Address Selection  . . . . . . . . . .  10
       6.5.2.  Anwerer Bundle Address Selection  . . . . . . . . . .  10
       6.5.3.  Moving A Media Description Out Of A BUNDLE Group  . .  10
       6.5.4.  Rejecting A Media Description In A BUNDLE Group . . .  11
   7.  Single vs Multiple RTP Sessions . . . . . . . . . . . . . . .  11
     7.1.  General . . . . . . . . . . . . . . . . . . . . . . . . .  11
     7.2.  Single RTP Session  . . . . . . . . . . . . . . . . . . .  11
   8.  Usage With ICE  . . . . . . . . . . . . . . . . . . . . . . .  12
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