Multiplexing Negotiation Using Session Description Protocol (SDP) Port Numbers
draft-ietf-mmusic-sdp-bundle-negotiation-01

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Document Type Active Internet-Draft (mmusic WG)
Last updated 2012-08-20
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: February 21, 2013                                        Google
                                                         August 20, 2012

 Multiplexing Negotiation Using Session Description Protocol (SDP) Port
                                Numbers
            draft-ietf-mmusic-sdp-bundle-negotiation-01.txt

Abstract

   This specification defines a new SDP Grouping Framework 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

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

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   This Internet-Draft will expire on February 21, 2013.

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
   (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
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   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 . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .  3
   3.  Conventions  . . . . . . . . . . . . . . . . . . . . . . . . .  4
   4.  Applicability Statement  . . . . . . . . . . . . . . . . . . .  4
   5.  SDP Grouping Framework BUNDLE Extension Semantics  . . . . . .  4
   6.  SDP Offer/Answer Procedures  . . . . . . . . . . . . . . . . .  4
     6.1.  General  . . . . . . . . . . . . . . . . . . . . . . . . .  4
     6.2.  SDP Offerer Procedures . . . . . . . . . . . . . . . . . .  5
     6.3.  SDP Answerer Procedures  . . . . . . . . . . . . . . . . .  6
     6.4.  Bundled SDP Information  . . . . . . . . . . . . . . . . .  6
       6.4.1.  General  . . . . . . . . . . . . . . . . . . . . . . .  6
       6.4.2.  Bandwidth (b=) . . . . . . . . . . . . . . . . . . . .  6
   7.  Single vs Multiple RTP Sessions  . . . . . . . . . . . . . . .  6
     7.1.  General  . . . . . . . . . . . . . . . . . . . . . . . . .  6
     7.2.  Single RTP Session . . . . . . . . . . . . . . . . . . . .  6
   8.  Usage With ICE . . . . . . . . . . . . . . . . . . . . . . . .  7
     8.1.  General  . . . . . . . . . . . . . . . . . . . . . . . . .  7
     8.2.  Candidates . . . . . . . . . . . . . . . . . . . . . . . .  7
   9.  Security Considerations  . . . . . . . . . . . . . . . . . . .  8
   10. Example  . . . . . . . . . . . . . . . . . . . . . . . . . . .  8
   11. IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 10
   12. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 10
   13. Change Log . . . . . . . . . . . . . . . . . . . . . . . . . . 10
   14. References . . . . . . . . . . . . . . . . . . . . . . . . . . 10
     14.1. Normative References . . . . . . . . . . . . . . . . . . . 10
     14.2. Informative References . . . . . . . . . . . . . . . . . . 11
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 11

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1.  Introduction

   In the IETF RTCWEB WG, a need to use a single 5-tuple for sending and
   receiving media associated with multiple SDP media descriptions ("m="
   lines) has been identified.  This would e.g. allow the usage of a
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