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

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

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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