Subject: [MMUSIC] FW: I-D Action:draft-veikkolainen-mmusic-ice-suppress-checks-00.txt

From: <[email-masked]>
Date: Fri, 8 Oct 2010 15:48:23 +0200

Hello,

I have submitted a new I-D which defines an extension for ICE for suppressing connectivity checks for certain candidate addresses.

http://www.ietf.org/internet-drafts/draft-veikkolainen-mmusic-ice-suppress-checks-00.txt

A bit of background: http://tools.ietf.org/html/draft-ietf-mmusic-sdp-cs-05 defines conventions for describing circuit-switched audio and video streams in SDP. Earlier, we had another document, draft-garcia-mmusic-misc-cap, which together with sdp-cs draft would have allowed describing alternative PSTN and IP bearers in SDP using the SDP Capability Negotiation framework.

After long and winding discussions, the decision was to remove the connection address capability from misc-cap draft, since it would have allowed offering alternative addresses of any type, and thus circumventing ICE. 

So, another approach of offering alternative PSTN and IP bearer is to use ICE, but then we need a way to tell to the agents that connectivity checks are not really meaningful for PSTN address candidates. The new draft defines such an extension to ICE.

Other documents have also argued for the possibility of not always performing ICE connectivity checks (http://tools.ietf.org/html/draft-hutton-mmusic-icemicrolite-01, http://tools.ietf.org/html/draft-wing-dispatch-v6-migration-00 and http://tools.ietf.org/html/draft-boucadair-mmusic-altc-01).

This is a very first draft, and many things are probably still missing. However, I would like to hear folks' opinions on the general idea already at this point.

regards,
Simo

PS. I will be out of office 11.-18.10., responding to emails may be slow.

>-----Original Message-----
>From: [email-masked] [mailto:i-d-announce-
>[email-masked]] On Behalf Of ext [email-masked]
>Sent: 08 October, 2010 16:45
>To: [email-masked]
>Subject: I-D Action:draft-veikkolainen-mmusic-ice-suppress-checks-00.txt
>
>A New Internet-Draft is available from the on-line Internet-Drafts
>directories.
>
>	Title           : Interactive Connectivity Establishment (ICE)
>extensions for suppressing connectivity checks
>	Author(s)       : S. Veikkolainen
>	Filename        : draft-veikkolainen-mmusic-ice-suppress-checks-
>00.txt
>	Pages           : 10
>	Date            : 2010-10-08
>
>Connectivity checks as proposed by Interactive Connectivity
>Establishment (ICE) are used to detect problems that cause endpoints not
>to receive media.  However, in some cases connectivity checks are not
>seen as necessary, or such checks are not feasible for certain bearer
>types.
>
>This document defines a new candidate address type for which
>connectivity checks are not performed.
>
>A URL for this Internet-Draft is:
>http://www.ietf.org/internet-drafts/draft-veikkolainen-mmusic-ice-
>suppress-checks-00.txt
>
>Internet-Drafts are also available by anonymous FTP at:
>ftp://ftp.ietf.org/internet-drafts/
>
>Below is the data which will enable a MIME compliant mail reader
>implementation to automatically retrieve the ASCII version of the
>Internet-Draft.
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