Re: [Geopriv] Geo in ENUM

["Alexander Mayrhofer" <alexander.mayrhofer at nic.at>]

> I just saw your document in ENUM proposing a location ENUM 
> service.  Why 
> is this necessary in addition to the U-NAPTR mechanism in the LIS 
> discovery document?  (draft-ietf-geopriv-lis-discovery)  It 
> seems like 
> you could just one of the U-NAPTR records as defined there with an 
> e164.arpa domain to do what you're doing.  Is there something special 
> about the e164.arpa domain that requires a separate NAPTR mechanism?

Hello Richard,

i've reviewed the LIS Discovery draft, and it has a very different use
case from what i'm trying to achieve with the "Geo" ENUM service.

The LIS discovery draft says in the introduction that the URI retrieved
can jsut be used for location configuration of the requestor, not as a
location by reference URI. That's exactly the contrary of what i'm
trying to achieve with the ENUM-Service: The ENUM service is supposed to
carry a location-by-reference URI for the device that uses the
corresponding phone number, and that URI would not be used for location
configuration.


This might be useful in a scenario like this:

- Carrier A delivers an emergency call to a PSAP using "normal" PSTN
transport.
- PSAP receives only the number, but can "look up" the
location-by-reference URI by means of an ENUM tree (that tree may very
likely be private to carriers and PSAPs)
- PSAP dereferences location-by-reference URI gathered from ENUM.

Another scenario might be a quite "open" scenario, like:

- I configure the location-by-reference URI into my public ENUM entry.
- everybody can look up that ENUM entry by my phone number
- However, i limit location dereferencing to "people i know".

Hope that made the difference in use cases (compared to the
lis-discovery draft) clear.

(BTW, small nit - i've not read the held: URI spec, but you say in
section 2 that there "is no default port", while the port component is
not included in the example URI in section 4)


Alex
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