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

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Document Type Active Internet-Draft (mmusic WG)
Last updated 2013-02-18
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: 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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   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on August 22, 2013.

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
   Provisions Relating to IETF Documents
   (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 August 22, 2013                [Page 1]
Internet-Draft                Bundled media                February 2013

   to this document.  Code Components extracted from this document must
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   described in the Simplified BSD License.

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
     A.2.  UA Interoperability  . . . . . . . . . . . . . . . . . . . 15
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