Re: [MMUSIC] I-D Action: draft-ietf-mmusic-sdp-cs-22.txt

Hello WG,

We have submitted a new version of http://tools.ietf.org/html/draft-ietf-mmusic-sdp-cs-22 

To recap, there was discussion on the  MMUSIC WG list on which correlation mechanisms should be mandatory to implement (see Gonzalo's email http://www.ietf.org/mail-archive/web/mmusic/current/msg12274.html ). As stated by Gonzalo, 3GPP is going to use this draft, more specifically the plan now is to use the caller id based correlation mechanism. This was the message I got from Andrew after a recent 3GPP CT1 meeting.

We have now made the following changes to the draft:
-	the endpoint may choose which correlation mechanisms to implement (before all three were MTI).
-	we have introduced a fourth correlation type ("external") which indicates explicit support for cases where also some external means, typically the human user, can do the correlation. This can be as a fallback in cases where no other common correlation mechanism is found, or the negotiated correlation mechanisms fail due to being not supported in the PSTN network. This is much like current systems like Webex work.

This was also the guidance from the IESG informal telechat in December where Gonzalo presented the draft.

We would like to hear from the WG whether there are any concerns with these changes.

On behalf of the authors,
Simo

PS. I'll add the proposed change in http://www.ietf.org/mail-archive/web/mmusic/current/msg12792.html to next version, slipped my mind this time.

-----Original Message-----
From: mmusic [mailto:mmusic-bounces@ietf.org] On Behalf Of ext internet-drafts@ietf.org
Sent: 31 January, 2014 12:25
To: i-d-announce@ietf.org
Cc: mmusic@ietf.org
Subject: [MMUSIC] I-D Action: draft-ietf-mmusic-sdp-cs-22.txt

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           : Session Description Protocol (SDP) Extension For Setting Audio and Video Media Streams Over Circuit-Switched Bearers In The Public Switched Telephone Network (PSTN)
        Authors         : Miguel A. Garcia-Martin
                          Simo Veikkolainen
	Filename        : draft-ietf-mmusic-sdp-cs-22.txt
	Pages           : 37
	Date            : 2014-01-31

Abstract:
   This memo describes use cases, requirements, and protocol extensions
   for using the Session Description Protocol (SDP) Offer/Answer model
   for establishing audio and video media streams over circuit-switched
   bearers in the Public Switched Telephone Network (PSTN).

The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-mmusic-sdp-cs/

There's also a htmlized version available at:
http://tools.ietf.org/html/draft-ietf-mmusic-sdp-cs-22

A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=draft-ietf-mmusic-sdp-cs-22

Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/

_______________________________________________
mmusic mailing list
mmusic@ietf.org
https://www.ietf.org/mailman/listinfo/mmusic