Miscellanoues Capabilities Negotiation in the Session Description Protocol (SDP)
draft-ietf-mmusic-sdp-miscellaneous-caps-01

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Last updated 2012-08-27
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MMUSIC WG                                               M. Garcia-Martin
Internet-Draft                                                  Ericsson
Intended status: Standards Track                         S. Veikkolainen
Expires: February 28, 2013                                         Nokia
                                                               R. Gilman
                                                         August 27, 2012

   Miscellanoues Capabilities Negotiation in the Session Description
                             Protocol (SDP)
              draft-ietf-mmusic-sdp-miscellaneous-caps-01

Abstract

   SDP has been extended with a capability negotiation mechanism
   framework that allows the endpoints to negotiate transport protocols
   and attributes.  This framework has been extended with a media
   capabilities negotiation mechanism that allows endpoints to negotiate
   additional media-related capabilities.  This negotiation is embedded
   into the widely-used SDP offer/answer procedures.

   This memo extends the SDP capability negotiation framework to allow
   endpoints to negotiate three additional SDP capabilities.  In
   particular, this memo provides a mechanism to negotiate bandwidth
   ('b=' line), connection data ('c=' line), and titles ('i=' line for
   each session or media).

Status of this Memo

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   This Internet-Draft will expire on February 28, 2013.

Copyright Notice

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

Garcia-Martin, et al.   Expires February 28, 2013               [Page 1]
Internet-Draft     SDP Misc. Capabilities Negotiation        August 2012

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Garcia-Martin, et al.   Expires February 28, 2013               [Page 2]
Internet-Draft     SDP Misc. Capabilities Negotiation        August 2012

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  4
   2.  Conventions Used in This Document  . . . . . . . . . . . . . .  4
   3.  Protocol Description . . . . . . . . . . . . . . . . . . . . .  4
     3.1.  Extensions to SDP  . . . . . . . . . . . . . . . . . . . .  4
       3.1.1.  Bandwidth Capability . . . . . . . . . . . . . . . . .  7
       3.1.2.  Connection Data Capability . . . . . . . . . . . . . .  9
       3.1.3.  Title Capability . . . . . . . . . . . . . . . . . . . 11
     3.2.  Session Level versus Media Level . . . . . . . . . . . . . 14
     3.3.  Offer/Answer model extensions  . . . . . . . . . . . . . . 14
       3.3.1.  Generating the Initial Offer . . . . . . . . . . . . . 15
       3.3.2.  Generating the Answer  . . . . . . . . . . . . . . . . 15
       3.3.3.  Offerer Processing of the Answer . . . . . . . . . . . 15
       3.3.4.  Modifying the Session  . . . . . . . . . . . . . . . . 15
   4.  Field Replacement Rules  . . . . . . . . . . . . . . . . . . . 15
   5.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 16
     5.1.  New SDP Attributes . . . . . . . . . . . . . . . . . . . . 16
     5.2.  New Option Tags  . . . . . . . . . . . . . . . . . . . . . 17
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