Re: [Ecrit] Emergency calling without endpoint/VSP location support

["Thomson, Martin" <Martin.Thomson at andrew.com>]

I believe that the tie between PSAP and ISP might be possible - both require a physical presence.  Under the conditions where the VSP also has a tie, this could work.

I've seen a number of proposals and am quite interested in working on a solution.  

Cheers,
Martin

(My gut feel is that this might cross over into the GEOPRIV work relating to LIS discovery, but we can work that out as we go.)

> -----Original Message-----
> From: ecrit-bounces at ietf.org [mailto:ecrit-bounces at ietf.org] On Behalf
> Of Richard Barnes
> Sent: Thursday, 20 November 2008 7:20 PM
> To: ECRIT
> Subject: [Ecrit] Emergency calling without endpoint/VSP location
> support
> 
> In the ECRIT meeting at IETF 73, Hannes proposed forming a Design Team
> on what I'll call "IP-to-location" mapping.  He correctly observed that
> several planned architectures for VoIP emergency calling involve PSAPs
> or VSPs doing something like the following process in order to get
> location information for endpoints:
> 1. Gets an emergency call from a caller at a given IP address
> 2. Determine the ISP responsible for that IP address
> 3. Fetch location from the ISP
> 
> The solution above is *obviously* a hack, because step 2 involves a lot
> of uncertainty on any reasonable scale.  However, the problem it
> addresses is real, especially in the short term: How should a VSP route
> a call if endpoints don't support location?  (Likewise, how should a
> PSAP get location if VSPs and endpoints don't support location?)
> 
> In order to address this problem, some sort of IP-to-location mapping
> will be required.  As Jon pointed out in the meeting, this will not be
> solvable for the general Internet, for the same reason that we've
> always
> assumed that ISPs and VSPs are decoupled.  However, I think this
> mapping
> can be enabled in certain circumstances, if the parties involved (ISPs,
> VSPs/PSAPs) have the right relationships and implement the right
> things.
>   (Purposely vague, because I don't have a solution!)
> 
> So I'd like to suggest that ECRIT think about a document of the
> following form:
> 1. Problem statement: Need to route emergency calls even when endpoints
> don't support location (get endpoint location at the PSAP when
> endpoints
> and VSPs don't provide it)
> 2. How and when this problem can be solved (and why it doesn't scale up
> to Internet)
> 3. How to transition from this system to the ECRIT architecture
> 
> I don't know if I'm the best person to write such a document, but I'd
> be
> glad to help out.
> 
> --Richard
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