Re: [Ecrit] New Version Notification for draft-patel-ecrit-sos-parameter-07

[Cullen Jennings <fluffy at cisco.com>]

It was pointed out to me that some registrars that do not support the  
emergency registration will accept a contact with the sos parameter  
and will also return it in the 200. They just copy the data. Because  
of this, I don't think that detecting the parameter in the 200 is a  
sufficient way for the UA to know the registrar supports this  
mechanism. Due to it's importance for emergency calls, this seems like  
a real problem.

My recommended fix to this would be to add a required/supported option  
tag. I realize this is not great news to many of the folks involved  
but from what I have heard, this does sounds like a problem. Glad to  
hear any ideas on how to get a solutions published quickly that meets  
3GPPs requirements.

Cullen <with my AD hat on>


On Oct 27, 2009, at 7:14 , Milan Patel wrote:

> Hi Cullen,
>
> I have submitted a new version of draft-patel-ecrit-sos-parameter
>
> Latest changes are:
> - clarification of use
> - change of URI parameter name to "reg-type" which can have a value
> - specifically for 3GPP's IMS emergency services solution, "reg-type"
> takes the value "sos".
>
> - the URI parameter is extensible to allow other values to be used in
> the future for other use cases where the registration type needs to be
> explicitly identified to the registrar.
>
> I hope this helps in addressing the concerns that you and others had
> about the previous version.
> Due to the 3GPP release 7 dependency on this draft, I hope we can  
> reach
> consensus on this draft as soon as possible.
>
> Best regards,
> Milan
>
>
>
> -----Original Message-----
> From: IETF I-D Submission Tool [mailto:idsubmission at ietf.org]
> Sent: 26 October 2009 22:04
> To: Patel, Milan (MOP:EP10)
> Subject: New Version Notification for draft-patel-ecrit-sos- 
> parameter-07
>
>
>
> A new version of I-D, draft-patel-ecrit-sos-parameter-07.txt has been
> successfuly submitted by Milan Patel and posted to the IETF  
> repository.
>
> Filename:	 draft-patel-ecrit-sos-parameter
> Revision:	 07
> Title:		 SOS Uniform Resource Identifier (URI) Parameter for
> Marking of Session Initiation Protocol (SIP) Requests related to
> Emergency Services
> Creation_date:	 2009-10-26
> WG ID:		 Independent Submission
> Number_of_pages: 8
>
> Abstract:
> This document defines a new Session Initiation Protocol (SIP) Uniform
> Resource Identifier (URI) parameter intended for marking SIP
> registration requests related to emergency services.  The URI
> parameter is extensible to allow future values to be defined if
> required by other use cases that require specific SIP registrations
> to be distinctly identified.  The usage of this new URI parameter
> complements the usage of the Service Uniform Resource Name (URN) and
> is not intended to replace it.
>
>
>
>
> The IETF Secretariat.