SDP Media Capabilities Negotiation
draft-ietf-mmusic-sdp-media-capabilities-13

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Last updated 2012-03-12
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MMUSIC                                                         R. Gilman
Internet-Draft                                               Independent
Intended status: Standards Track                                 R. Even
Expires: September 13, 2012                             Gesher Erove Ltd
                                                            F. Andreasen
                                                           Cisco Systems
                                                          March 12, 2012

                   SDP Media Capabilities Negotiation
              draft-ietf-mmusic-sdp-media-capabilities-13

Abstract

   Session Description Protocol (SDP) capability negotiation provides a
   general framework for indicating and negotiating capabilities in SDP.
   The base framework defines only capabilities for negotiating
   transport protocols and attributes.  In this document, we extend the
   framework by defining media capabilities that can be used to
   negotiate media types and their associated parameters.

Status of this Memo

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   This Internet-Draft will expire on September 13, 2012.

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   Copyright (c) 2012 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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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

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   to this document.  Code Components extracted from this document must
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   This document may contain material from IETF Documents or IETF
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Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  4
   2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .  5
   3.  SDP Media Capabilities . . . . . . . . . . . . . . . . . . . .  6
     3.1.  Requirements . . . . . . . . . . . . . . . . . . . . . . .  6
     3.2.  Solution Overview  . . . . . . . . . . . . . . . . . . . .  7
     3.3.  New Capability Attributes  . . . . . . . . . . . . . . . . 13
       3.3.1.  The Media Format Capability Attributes . . . . . . . . 13
       3.3.2.  The Media Format Parameter Capability Attribute  . . . 15
       3.3.3.  The Media-Specific Capability Attribute  . . . . . . . 18
       3.3.4.  New Configuration Parameters . . . . . . . . . . . . . 20
       3.3.5.  The Latent Configuration Attribute . . . . . . . . . . 21
       3.3.6.  Enhanced Potential Configuration Attribute . . . . . . 24
       3.3.7.  Substitution of Media Payload Type Numbers in
               Capability Attribute Parameters  . . . . . . . . . . . 27
       3.3.8.  The Session Capability Attribute . . . . . . . . . . . 28
     3.4.  Offer/Answer Model Extensions  . . . . . . . . . . . . . . 32
       3.4.1.  Generating the Initial Offer . . . . . . . . . . . . . 33
       3.4.2.  Generating the Answer  . . . . . . . . . . . . . . . . 36
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