[Int-area] Re: Discovering a Location Server in the Access Network

Hi all,

I haven't received concerns regarding the suggested discovery approach. 
May I assume from the lack of feedback that the suggested approach is 
reasonable?

Ciao
Hannes

Hannes Tschofenig wrote:
> Hi all,
>
> I would need some feedback regarding work that is currently being done 
> in the GEOPRIV working group.
> For some time we have been working on an application layer protocol 
> that allows the end host to obtain its own location information (or a 
> reference to it) from a server (called LIS) in the access network. 
> This LIS indeed needs to be located in the access network (and not at 
> an arbitrary place on the Internet) since only the layer 2/layer 3 
> provider is able to determine the precise location of end point.
>
> A year ago I lead a design team that captured the problem statement 
> and requirements. The document is available here:
> http://www.ietf.org/internet-drafts/draft-ietf-geopriv-l7-lcp-ps-05.txt
>
> The protocol that provides the functionality of the above-mentioned 
> requirements document is HELD:
> http://tools.ietf.org/html/draft-ietf-geopriv-http-location-delivery
>
> Providing the end host with the address of the LIS is relatively easy 
> if you can use DHCP. However, there are deployment environments (such 
> as DSL networks) where the DSL operator cannot control the DSL home 
> routers and any information that is provided by the DSL operator may 
> not be relayed to the end host via this box.
>
> So, to overcome this issue the group had an idea: Let's use a 
> different discovery technique that does not require upgrades to 
> intermediate devices (such as this DSL home router).
>
> In short, the current proposal (see 
> http://tools.ietf.org/html/draft-thomson-geopriv-lis-discovery-02.txt; 
> ignoring Section 2 which defines the DHCP portion) essentially does 
> the following:
>
> * Discover the public IP address of the end point
> * Perform a reverse DNS lookup to learn the domain
> * Lookup the LIS for that domain
> * Contact the LIS
>
> We have investigated other solutions as well (see Section 4 of  
> http://www.ietf.org/internet-drafts/draft-ietf-geopriv-l7-lcp-ps-05.txt) 
> but the group (or at least a few folks) believes that this is a "good" 
> approach.
>
> I had a chat with Jari and we both agree that this topoic falls into 
> the expertise of the Internet Area. Hence, I would like to solicit 
> feedback from you.
>
> Ciao
> Hannes
>
>

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