MMUSIC Working Group C. Holmberg
Internet-Draft Ericsson
Updates: 3264 (if approved) H. Alvestrand
Intended status: Standards Track Google
Expires: October 9, 2014 C. Jennings
Cisco
April 7, 2014
Multiplexing Negotiation Using Session Description Protocol (SDP) Port
Numbers
draft-ietf-mmusic-sdp-bundle-negotiation-06.txt
Abstract
This specification defines a new SDP Grouping Framework extension,
"BUNDLE", that can be used with the Session Description Protocol
(SDP) Offer/Answer mechanism to negotiate the usage of bundled media,
which refers to the usage of a single 5-tuple for sending and
receiving media associated with multiple SDP media descriptions ("m="
lines).
This specification also updates sections 5.1, 8.1 and 8.2 of RFC
3264, in order to allow an answerer to in an SDP answer assign a non-
zero port value to an "m=" line, even if the offerer in the
associated SDP offer had assigned a zero port value to the "m=" line.
Status of This Memo
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This Internet-Draft will expire on October 9, 2014.
Holmberg, et al. Expires October 9, 2014 [Page 1]Internet-Draft Bundled media April 2014Copyright Notice
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 4
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 5
3. Conventions . . . . . . . . . . . . . . . . . . . . . . . . . 6
4. Applicability Statement . . . . . . . . . . . . . . . . . . . 6
5. SDP Grouping Framework BUNDLE Extension Semantics . . . . . . 6
5.1. General . . . . . . . . . . . . . . . . . . . . . . . . . 6
5.2. SDP Offer/Answer Procedures . . . . . . . . . . . . . . . 6
5.2.1. General . . . . . . . . . . . . . . . . . . . . . . . 6
5.2.2. SDP Information Considerations . . . . . . . . . . . 7
5.2.3. Generating the Initial Offer . . . . . . . . . . . . 7
5.2.4. Generating the Answer . . . . . . . . . . . . . . . . 8
5.2.5. Offerer Processing of the Answer . . . . . . . . . . 10
5.2.6. Modifying the Session . . . . . . . . . . . . . . . . 11
6. SDP 'bundle-only' Attribute . . . . . . . . . . . . . . . . . 13
6.1. General . . . . . . . . . . . . . . . . . . . . . . . . . 13
6.2. SDP Offer/Answer Procedures . . . . . . . . . . . . . . . 13
6.2.1. Generating the Initial Offer . . . . . . . . . . . . 13
6.2.2. Generating the Answer . . . . . . . . . . . . . . . . 13
6.2.3. Offerer Processing of the Answer . . . . . . . . . . 14
6.2.4. Modifying the Session . . . . . . . . . . . . . . . . 14
7. Protocol Identification . . . . . . . . . . . . . . . . . . . 14
7.1. General . . . . . . . . . . . . . . . . . . . . . . . . . 14
7.2. STUN, DTLS, SRTP . . . . . . . . . . . . . . . . . . . . 15
8. RTP Considerations . . . . . . . . . . . . . . . . . . . . . 15
8.1. Single RTP Session . . . . . . . . . . . . . . . . . . . 15
8.1.1. General . . . . . . . . . . . . . . . . . . . . . . . 15
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