AW: [Geopriv] Location Presence Event Package

["Hannes Tschofenig" <[e-mail]>]

Hi Rudolf, 

> Hello Hannes!
> 
> The following comments regarding the documents that you mentionned:
> 
> *) The content of location presence notifications is based on PIDF-LO. For
> containment status data (inside/outside of an area) an extension proposed
> in
> http://www.ietf.org/internet-drafts/draft-ietf-geopriv-loc-filters-01.txt is used.


Ok

> 
> *)  The story about the document draft-ietf-geopriv-loc-filters-01.txt by
> Rohan Mahy is, that the draft was expired and I decided to copy some parts
> of it in the location presence draft. There are some minor adjustments to
> draft-ietf-geopriv-loc-filters-01.txt, that we propose, and that I have also
> posted on this mailing list.
> Now this draft has reappeard and I plan to just refer to Rohan's draft in
> the next version.
> 

Got it. 

> *) RFC 4745 describes in general how policy documents should look like.
> draft-ietf-geopriv-policy-11.txt describes the polica about access to
> presence data depending on the current location. There may be some kind of
> connection to location presence, but we see potential problems if policy areas and
> location presence areas overlap (in particular, if the service should be
> implemented on a mobile phone with restricted computing resources). We will
> further investigate the relation of our draft to policy rules.
> draft-ietf-simple-presence-rules-09.txt describes policy for RPIDF
> documents. We did not find RPIDF useful for transporting locatrion presence data.

That's certainly something we should discuss further. I would like to better understand your thoughts about potential problems for the relationship between presence and location policy. 


> 
> *) draft-ietf-geopriv-pdif-lo-profile-06.txt is mentionned in the location
> presence document as a potential reference. The geographical shapes in
> this draft are much more complex than the rectangle shape in our draft.
> The location presence event package should be implemented in mobile
> devices. Finding out, whether a mobile phone is inside/outside of a specified
> geographical shape may result in complex and resource intensive calculations
> (with exception of the shape of a circle (center point with radius) that is
> missing in the features.xsd of GML).

I will have to double-check this with your draft. There are a couple of shapes in draft-ietf-geopriv-pdif-lo-profile-06.txt that relate to location determination techniques used in cellular networks. 

I will respond to this aspect in a separate mail 

> 
> *) draft-ietf-geopriv-revised-civic-lo-05.txt  works with civic addresses
> that are out of the scope of the location presence avent package. Again
> there is the problem, how to implement mapping of geographical data to civic
> addresses on a mobile phone.

Civic address information is more valueable in an non-cellular environment. There are, however, a couple of mobility environments where this is pretty useful. 


> We rather think that such a mapping service
> should be implemented by some GIS in the network.
> 
> *) draft-singh-geopriv-pidf-lo-dynamic-01.txt is definitely interesting
> regading dynamic features like speed, accelleration or bearing. In real
> applications, there are however scalability considerations to be done, in
> particular regarding the rate of notifications. 

I am sure that there are implications regarding the amount of notifications being returned. This aspect motivated Rohan's filter draft. 

Ciao
Hannes

> 
> Greetings
> Rudolf
> 
> 
> 
> 
> -----Ursprüngliche Nachricht-----
> Von: Hannes Tschofenig [mailto:[e-mail]] 
> Gesendet: Montag, 09. April 2007 13:31
> An: Pailer Rudolf
> Cc: [e-mail]
> Betreff: Re: [Geopriv] Location Presence Event Package
> 
> Hi Rudolf,
> 
> I would be interested to read the documents you mentioned. I also would 
> like to better understand the relationship of your document to the 
> following GEOPRIV documents:
> 
> * PIDF-LO & Presence
> The PIDF-LO (http://www.ietf.org/rfc/rfc4119.txt) is meant to be used in 
> the presence architecture. RFC 4079 http://www.ietf.org/rfc/rfc4079.txt 
> describes the motivation why it is useful to map the presence work to 
> the GEOPRIV concepts.
> 
> * Notification Filters
> To limit the amount of notifications Rohan wrote a document that is 
> about to get finished (see 
> http://www.ietf.org/internet-drafts/draft-ietf-geopriv-loc-filters-01.txt).
> 
> * The Common Policy / GEOPRIV / Presence authorization policy documents 
> describe how privacy can be enabled for presence based systems that, 
> among other things, use location information in presence systems.
> Here are the documents:
> http://www.ietf.org/rfc/rfc4745.txt
> http://www.ietf.org/internet-drafts/draft-ietf-geopriv-policy-11.txt
> http://www.ietf.org/internet-drafts/draft-ietf-simple-presence-rules-09.txt
> 
> We recently worked on a short paper for a W3C privacy workshop. I have 
> to search for it...
> A longer version of the paper will be published soon in form of an IETF 
> draft.
> 
> * Profiling of Location Formats
> http://www.ietf.org/internet-drafts/draft-ietf-geopriv-pdif-lo-profile-06.txt
> This document provides more information on the usage of GML. The idea 
> was that we do the profiling once and then we don't need todo it for 
> every document.
> A revised version of the civic location format can be found here; 
> http://www.ietf.org/internet-drafts/draft-ietf-geopriv-revised-civic-lo-05.txt
> 
> * Temporal Features
> http://tools.ietf.org/wg/geopriv/draft-singh-geopriv-pidf-lo-dynamic-01.txt
> This document extends the <location> element specified in RFC 4119 to 
> carry temporal feature elements useful for tracking moving objects.
> 
> Ciao
> Hannes
> 
> Pailer Rudolf wrote:
> > Hello!
> >
> > I would like to notify you about the the Internet Draft "A Location
> > Presence Event Package for the Session Initiation Protocol (SIP)".
> > http://www.ietf.org/internet-drafts/draft-pailer-locpres-00.txt
> >
> > The draft describes the usage of the Session Initiation Protocol (SIP)
> > for subscriptions and notifications of location presence. Location
> > presence is information about the geographical position of a user.
> > Subscriptions and notifications of location presence are supported by
> > defining an event package within the general SIP event notification
> > framework.
> >
> > The concept of a SIP based location enabler that is the core of the
> > proposed draft was published on several occasions:
> > *) A Terminal-Based Location Service Enabler for the IP Multimedia
> > Subsystem, R. Pailer, S. Bessler, F. Wegscheider, IEEE Wireless
> > Communications and Networking Conference April 2006 (WCNC06), Las Vegas,
> > USA
> > *) Terminal-Centric Location Services for the IP Multimedia Subsystem,
> > J. Fabini, M. Happenhofer, R. Pailer, IEEE 63rd Vehicular Technology
> > Conference, May 2006, Melbourne, Australia
> > *) Implementing a Native IMS Location Service Enabler over a
> > Prototypical IMS Core Network Testbed, P. Reichl, S. Bessler, J. Fabini,
> > R. Pailer, J. Zeiss,The Third IEEE International Workshop on Mobile
> > Commerce and Wireless Services (WMCS'06) June 26, 2006, San Francisco,
> > USA
> > *) Practical Experiences with an IMS-Aware Location Service Enabler on
> > Top of an Experimental Open Source IMS Core Implementation, P. Reichl,
> > S. Bessler, J. Fabini, R. Pailer, A. Poropatich, N. Jordan, R. Huber, H.
> > Weisgrab, C. Brandner, I. Gojmerac, M. Ries, F. Wegscheider, Journal of
> > Mobile Multimedia, Rinton Press, Fall 2006
> > *) Lecture Notes in Geoinformation and Cartography, Location Based
> > Services an TeleCartography, G. Gartner, W. Cartwright, M. P. Peterson
> > (Eds.), Springer, 2007
> >
> > I can provide above documents in PDF format, if needed.
> >
> > Feedback from the IETF Working Groups GEOPRIV and SIPPING would be
> > appreciated very much indeed.
> >
> > greetings
> > Rudolf
> >
> >
> >   
> > ------------------------------------------------------------------------
> >
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> > [e-mail]
> > https://www1.ietf.org/mailman/listinfo/geopriv
> >   

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