Negotiating Media Multiplexing Using the Session Description Protocol (SDP)
draft-ietf-mmusic-sdp-bundle-negotiation-53
MMUSIC Working Group C. Holmberg
Internet-Draft Ericsson
Updates: 3264,7941 (if approved) H. Alvestrand
Intended status: Standards Track Google
Expires: March 24, 2019 C. Jennings
Cisco
September 20, 2018
Negotiating Media Multiplexing Using the Session Description Protocol
(SDP)
draft-ietf-mmusic-sdp-bundle-negotiation-53.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 transport (5-tuple) for sending and receiving media described
by multiple SDP media descriptions ("m=" sections). Such transport
is referred to as a BUNDLE transport, and the media is referred to as
bundled media. The "m=" sections that use the BUNDLE transport form
a BUNDLE group.
This specification updates RFC 3264, to also allow assigning a zero
port value to a "m=" section in cases where the media described by
the "m=" section is not disabled or rejected.
This specification defines a new RTP Control Protocol (RTCP) source
description (SDES) item and a new RTP header extension that can be
used to correlate bundled RTP/RTCP packets with their appropriate
"m=" section.
This specification updates RFC 7941, by adding an exception, for the
MID RTP header extension, to the requirement regarding protection of
an SDES RTP header extension carrying an SDES item for the MID RTP
header extension.
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 https://datatracker.ietf.org/drafts/current/.
Holmberg, et al. Expires March 24, 2019 [Page 1]
Internet-Draft Bundled media September 2018
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
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material or to cite them other than as "work in progress."
This Internet-Draft will expire on March 24, 2019.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1. Background . . . . . . . . . . . . . . . . . . . . . . . 4
1.2. BUNDLE Mechanism . . . . . . . . . . . . . . . . . . . . 4
1.3. Protocol Extensions . . . . . . . . . . . . . . . . . . . 5
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 6
3. Conventions . . . . . . . . . . . . . . . . . . . . . . . . . 8
4. Applicability Statement . . . . . . . . . . . . . . . . . . . 8
5. SDP Grouping Framework BUNDLE Extension . . . . . . . . . . . 8
6. SDP 'bundle-only' Attribute . . . . . . . . . . . . . . . . . 9
7. SDP Offer/Answer Procedures . . . . . . . . . . . . . . . . . 10
7.1. Generic SDP Considerations . . . . . . . . . . . . . . . 10
7.1.1. Connection Data (c=) . . . . . . . . . . . . . . . . 10
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