Technical Summary
This document specifies how the Message Session Relay Protocol (MSRP)
can be transported as a WebRTC data channel sub-protocol, using the
SDP offer/answer generic data channel negotiation framework to
establish such a channel. Two network configurations are supported:
connecting two MSRP over data channel endpoints; and a gateway
configuration, connecting an MSRP over data channel endpoint with an
MSRP over TCP or TLS endpoint. This document updates RFC4975.
Working Group Summary
The WG document was expired for almost a year, twice, due to unresponsive authors,
despite repeated efforts to encourage authors and trying to find other people willing
to take authorship. No technical controversy could be noted. The document was marked
as dead WG document in September 2018. 3GPP delegates noticed the change of status
and that there are references to this draft from 3GPP specifications, after which a new
author was finally stepping up, resulting in MMUSIC re-adoption in April 2019 after
affirmation that the new author was willing to drive the document until publication.
Since then, progress was fairly good with multiple revisions and receiving decent review
in the WG. One of the co-authors is also active in 3GPP standardization, which should
help ensure that the document is suitable for the mentioned 3GPP references.
Document Quality
There are no known implementations of the protocol beyond experimental proof-of-concept.
Some vendors have indicated plans to implement. 3GPP TS 24.371 references this draft
normatively when MSRP is to be supported in 3GPP WebRTC datachannel context.
The general document structure and content follows that of
draft-ietf-mmusic-t140-usage-data-channel (in RFC Editor's Queue at the time of writing)
which is describing another sub-protocol (t140) to WebRTC data channel and that received
significant review with respect to how to best structure such document.
Personnel
Bo Burman is the Document Shepherd.
Murray Kucherawy is the Responsible Area Director.