datatracker.ietf.org
Sign in
Version 5.9.0, 2014-12-18
Report a bug

Negotiating Media Multiplexing Using the Session Description Protocol (SDP)
draft-ietf-mmusic-sdp-bundle-negotiation-14

Document type: Active Internet-Draft (mmusic WG)
Document stream: IETF
Last updated: 2014-12-19
Intended RFC status: Unknown
Other versions: plain text, xml, pdf, html

IETF State: WG Document Nov 2014
Document shepherd: Flemming Andreasen

IESG State: I-D Exists
Responsible AD: (None)
Send notices to: No addresses provided

MMUSIC Working Group                                         C. Holmberg
Internet-Draft                                                  Ericsson
Updates: 3264 (if approved)                                H. Alvestrand
Intended status: Standards Track                                  Google
Expires: June 22, 2015                                       C. Jennings
                                                                   Cisco
                                                       December 19, 2014

 Negotiating Media Multiplexing Using the Session Description Protocol
                                 (SDP)
            draft-ietf-mmusic-sdp-bundle-negotiation-14.txt

Abstract

   This specification defines a new Session Description Protocol (SDP)
   Grouping Framework extension, 'BUNDLE'.  The extension can be used
   with the SDP Offer/Answer mechanism to negotiate the usage of a
   single address:port combination (BUNDLE address) for receiving media,
   referred to as bundled media, associated with multiple SDP media
   descriptions ("m=" lines).

   To assist endpoints in negotiating the use of bundle this
   specification defines a new SDP attribute, 'bundle-only', which can
   be used to request that specific media is only used if bundled.  This
   specification also updates sections 5.1, 8.1 and 8.2 of RFC 3264 to
   allow an answerer to assign a non-zero port value to an "m=" line in
   an SDP answer, even if the "m=" line in the associated SDP offer
   contained a zero port value.

   There are multiple ways to correlate the bundled RTP packets with the
   appropriate media descriptions.  This specification defines a new
   RTCP source description (SDES) item and a new RTP header extension
   that provides an additional way to do this correlation by using them
   to carry a value that associates the RTP/RTCP packets with a specific
   media description.

Status of This Memo

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

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

Holmberg, et al.          Expires June 22, 2015                 [Page 1]
Internet-Draft                Bundled media                December 2014

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on June 22, 2015.

Copyright Notice

   Copyright (c) 2014 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
   to this document.  Code Components extracted from this document must
   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  . . . . . . . . . . . . . . . . . . . . . . . .   4
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   5
   3.  Conventions . . . . . . . . . . . . . . . . . . . . . . . . .   6
   4.  Applicability Statement . . . . . . . . . . . . . . . . . . .   7
   5.  SDP Grouping Framework BUNDLE Extension . . . . . . . . . . .   7
     5.1.  General . . . . . . . . . . . . . . . . . . . . . . . . .   7
   6.  SDP 'bundle-only' Attribute . . . . . . . . . . . . . . . . .   7
     6.1.  General . . . . . . . . . . . . . . . . . . . . . . . . .   7
     6.2.  bundle-only . . . . . . . . . . . . . . . . . . . . . . .   8
   7.  SDP Information Considerations  . . . . . . . . . . . . . . .   8
     7.1.  General . . . . . . . . . . . . . . . . . . . . . . . . .   8
     7.2.  Connection Data (c=)  . . . . . . . . . . . . . . . . . .   9
     7.3.  Bandwidth (b=)  . . . . . . . . . . . . . . . . . . . . .   9
     7.4.  Attributes (a=) . . . . . . . . . . . . . . . . . . . . .   9
   8.  SDP Offer/Answer Procedures . . . . . . . . . . . . . . . . .   9
     8.1.  General . . . . . . . . . . . . . . . . . . . . . . . . .   9
     8.2.  Generating the Initial SDP Offer  . . . . . . . . . . . .  10
       8.2.1.  General . . . . . . . . . . . . . . . . . . . . . . .  10

[include full document text]