Re: [Geopriv] coming to terms on location by reference

Just a couple of clarifications:

Dawson, Martin wrote:
> 1) The efficiency argument is an over-used red herring. Networks need to
> work as fast as they need to and the Internet can be subject to
> excessive delays that impact VoIP for many reasons. My observation is
> that the consideration is primarily used as a rhetorical device.
> Estimates of time appear to be dismissed as negligible or over-blown
> depending on the point that people want to make.

I'm not going to argue with the fact that network efficiency discussions are
used a rhetorical device. But in general, I do believe people making those
arguments are sincere, as I have often been one of those people. However,
I'd like to point out that the observation I made regarding network
efficiency was an argument in favor of, not against, using location by
reference.

> 3) Authentication failure at the VPC, the emergency gateway, or indeed
> at the call server may mean an emergency call cannot be made at all -
> not even with default routing (which is at least possible without
> location). Citing scenarios involving error conditions, failures, or
> compromises through exploits are not valid arguments against any system.
> If it were one could argue that the entire IP protocol suite and the
> Internet should be disposed of as unacceptably risky.

My observation was not that the authentication could be compromised.
Instead, the observation was that the authentication would work and would
deny location dereference thus causing the failure of emergency call routing.

> To my previous post, we can also add the benefit that the application
> provided with a location reference can ask for location in the desired
> form - e.g. in jurisdicational/emergency civic, rather than postal
> civic, or in geodetic. As opposed to the client device needing to divine
> this information or provide every possible form of location in the
> PIDF-LO to every application.

That's an interesting point, though my understanding of the requirement for
the emergency case can be sumaarized as: "send everything you've got."

-andy

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Received on Tue, 12 Sep 2006 13:37:31 -0400