Negotiating Media Multiplexing Using the Session Description Protocol (SDP)

Approval announcement
Draft of message to be sent after approval:

From: The IESG <>
To: IETF-Announce <>
Cc: The IESG <>,,,,,,
Subject: Protocol Action: 'Negotiating Media Multiplexing Using the Session Description Protocol (SDP)' to Proposed Standard (draft-ietf-mmusic-rfc8843bis-05.txt)

The IESG has approved the following document:
- 'Negotiating Media Multiplexing Using the Session Description Protocol
  (draft-ietf-mmusic-rfc8843bis-05.txt) as Proposed Standard

This document is the product of the Multiparty Multimedia Session Control
Working Group.

The IESG contact persons are Murray Kucherawy and Francesca Palombini.

A URL of this Internet Draft is:

Technical Summary

   This specification defines a new Session Description Protocol (SDP)
   Grouping Framework extension called '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 defines a new RTP Control Protocol (RTCP) Source
   Description (SDES) item and a new RTP header extension.

   This specification updates RFCs 3264, 5888, and 7941.

   This specification obsoletes RFC 8843.

Working Group Summary

When RFC 8843 was published, there was a known inconsistency with JSEP (RFC 8829). This document corrects that inconsistency and incorporates two erratas as well. The nature of the update was agreed to beforehand with the RTCWeb WG and MMUSIC WG participants and the scope of the update was explicitly limited accordingly. There has been no subsequent disagreements or concerns raised. 

Document Quality

The protocol is an important part of the RTCWeb suite of specifications and browser vendors have either implemented or are planning to implement the specification. 

There is solid consensus behind the document, incl. overall alignment with the RTCWeb WG and the accompanying JSEP specification (RFC 8829). While the document has been formally reviewed by the MMUSIC group only, please note that there is substantial overlap between the WG participants in MMUSIC and RTCWeb and the document has been reviewed by known RTCWeb WG participants in MMUSIC. Also, the MMUSIC WG Last Call announcement was sent to the RTCWeb group mailing list.


Flemming Andreasen is the Document Shepherd.
Murray Kucherawy is the Responsible Area Director.