Negotiating Media Multiplexing Using the Session Description Protocol (SDP)
draft-ietf-mmusic-sdp-bundle-negotiation-22

 
Document Type Active Internet-Draft (mmusic WG)
Last updated 2015-06-16
Replaces draft-holmberg-mmusic-sdp-bundle-negotiation
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MMUSIC Working Group                                         C. Holmberg
Internet-Draft                                                  Ericsson
Updates: 3264 (if approved)                                H. Alvestrand
Intended status: Standards Track                                  Google
Expires: December 18, 2015                                   C. Jennings
                                                                   Cisco
                                                           June 16, 2015

 Negotiating Media Multiplexing Using the Session Description Protocol
                                 (SDP)
            draft-ietf-mmusic-sdp-bundle-negotiation-22.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.

   There are multiple ways to correlate the bundled RTP packets with the
   appropriate media descriptions.  This specification defines a new
   Real-time Transport Protocol (RTP) 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
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   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
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   material or to cite them other than as "work in progress."

Holmberg, et al.        Expires December 18, 2015               [Page 1]
Internet-Draft                Bundled media                    June 2015

   This Internet-Draft will expire on December 18, 2015.

Copyright Notice

   Copyright (c) 2015 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
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   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
   6.  SDP 'bundle-only' Attribute . . . . . . . . . . . . . . . . .   7
   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
       8.2.2.  Suggesting the offerer BUNDLE address . . . . . . . .  11
     8.3.  Generating the SDP Answer . . . . . . . . . . . . . . . .  11
       8.3.1.  General . . . . . . . . . . . . . . . . . . . . . . .  11
       8.3.2.  Answerer Selection of Offerer Bundle Address  . . . .  12
       8.3.3.  Answerer Selection of Answerer BUNDLE Address . . . .  12
       8.3.4.  Moving A Media Description Out Of A BUNDLE Group  . .  13
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