Multiplexing Negotiation Using Session Description Protocol (SDP) Port Numbers
draft-ietf-mmusic-sdp-bundle-negotiation-03

MMUSIC Working Group                                         C. Holmberg
Internet-Draft                                                  Ericsson
Intended status: Standards Track                           H. Alvestrand
Expires: August 22, 2013                                          Google
                                                             C. Jennings
                                                                   Cisco
                                                       February 18, 2013

 Multiplexing Negotiation Using Session Description Protocol (SDP) Port
                                Numbers
            draft-ietf-mmusic-sdp-bundle-negotiation-03.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 August 22, 2013.

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   carefully, as they describe your rights and restrictions with respect

Holmberg, et al.         Expires August 22, 2013                [Page 1]
Internet-Draft                Bundled media                February 2013

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Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .  4
   3.  Conventions  . . . . . . . . . . . . . . . . . . . . . . . . .  4
   4.  Applicability Statement  . . . . . . . . . . . . . . . . . . .  4
   5.  SDP Grouping Framework BUNDLE Extension Semantics  . . . . . .  4
   6.  SDP Offer/Answer Procedures  . . . . . . . . . . . . . . . . .  4
     6.1.  General  . . . . . . . . . . . . . . . . . . . . . . . . .  5
     6.2.  SDP Offerer Procedures . . . . . . . . . . . . . . . . . .  5
     6.3.  SDP Answerer Procedures  . . . . . . . . . . . . . . . . .  7
     6.4.  Bundled SDP Information  . . . . . . . . . . . . . . . . .  7
       6.4.1.  General  . . . . . . . . . . . . . . . . . . . . . . .  7
       6.4.2.  Bandwidth (b=) . . . . . . . . . . . . . . . . . . . .  7
       6.4.3.  Attributes (a=)  . . . . . . . . . . . . . . . . . . .  7
   7.  Single vs Multiple RTP Sessions  . . . . . . . . . . . . . . .  8
     7.1.  General  . . . . . . . . . . . . . . . . . . . . . . . . .  8
     7.2.  Single RTP Session . . . . . . . . . . . . . . . . . . . .  8
   8.  Usage With ICE . . . . . . . . . . . . . . . . . . . . . . . .  8
     8.1.  General  . . . . . . . . . . . . . . . . . . . . . . . . .  8
     8.2.  Candidates . . . . . . . . . . . . . . . . . . . . . . . .  9
     8.3.  Candidates . . . . . . . . . . . . . . . . . . . . . . . .  9
   9.  Security Considerations  . . . . . . . . . . . . . . . . . . .  9
   10. Example: SDP Offer with different port number values . . . . .  9
   11. Example: SDP Offer with identical port number values . . . . . 11
   12. IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 13
   13. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 13
   14. Change Log . . . . . . . . . . . . . . . . . . . . . . . . . . 13
   15. References . . . . . . . . . . . . . . . . . . . . . . . . . . 14
     15.1. Normative References . . . . . . . . . . . . . . . . . . . 14
     15.2. Informative References . . . . . . . . . . . . . . . . . . 14
   Appendix A.  Design Considerations . . . . . . . . . . . . . . . . 15
     A.1.  General  . . . . . . . . . . . . . . . . . . . . . . . . . 15