[MMUSIC] I-D Action: draft-ietf-mmusic-sdp-bundle-negotiation-15.txt

internet-drafts@ietf.org Fri, 16 January 2015 08:16 UTC

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Subject: [MMUSIC] I-D Action: draft-ietf-mmusic-sdp-bundle-negotiation-15.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
 This draft is a work item of the Multiparty Multimedia Session Control Working Group of the IETF.

        Title           : Negotiating Media Multiplexing Using the Session Description Protocol (SDP)
        Authors         : Christer Holmberg
                          Harald Tveit Alvestrand
                          Cullen Jennings
	Filename        : draft-ietf-mmusic-sdp-bundle-negotiation-15.txt
	Pages           : 48
	Date            : 2015-01-16

   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.

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