RE: [Geopriv] Comments on HELD-03

I like it.  However, it does say "reference to the most current available _reference_".  This should probably be "reference to the most current available _location information_".

> -----Original Message-----
> From: Winterbottom, James
> Sent: Tuesday, 8 January 2008 8:29 AM
> To: Stuard, Doug; 'Ted Hardie'; 'Mary Barnes'; 'Arolick, Eric'; Thomson,
> Martin; 'geopriv@ietf.org'
> Subject: RE: [Geopriv] Comments on HELD-03
> 
> Doug,
> 
> Ted's response hit the spirit of what I was trying to get at and I am more
> than happy with his wording.
> 
> Different URIs will result in different types of behaviour at the LIS and
> its subsequent responses. Defining, creating and controlling these URIs is
> what the Context Management document (http://tools.ietf.org/html/draft-
> winterbottom-geopriv-held-context-01) addresses.
> 
> Cheers
> James
> 
> 
> > -----Original Message-----
> > From: Stuard, Doug
> > Sent: Tuesday, 8 January 2008 8:20 AM
> > To: Ted Hardie; Winterbottom, James; Mary Barnes; Arolick, Eric; Thomson,
> > Martin; geopriv@ietf.org
> > Subject: RE: [Geopriv] Comments on HELD-03
> >
> > Perhaps the location returned should be the most recent. Merely
> accessing
> > the URI should not re-initiate location determination, as numerous
> > spurious location taskings could result.  An update should be
> specifically
> > requested (although such update could be automated in some applications).
> >
> > _____________________________________________
> > Doug Stuard
> > Andrew Network Services
> > 19700 Janelia Farm Blvd.
> > Ashburn, VA 20147
> > 703-726-5630
> > (fax) 703-726-5600
> >
> > Notice:
> >
> > This communication from Andrew Corporation, including attachments,
> > if any, is intended as a confidential and privileged communication.  If
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> >
> > Thank you.
> >
> >
> > > -----Original Message-----
> > > From: Ted Hardie [mailto:hardie@qualcomm.com]
> > > Sent: Monday, January 07, 2008 2:21 PM
> > > To: Winterbottom, James; Mary Barnes; Arolick, Eric; Thomson, Martin;
> > > geopriv@ietf.org
> > > Subject: RE: [Geopriv] Comments on HELD-03
> > >
> > > >[AJW] The Location URIs defined originally for HELD would always
> > > return the current location of the Target device, these other types of
> > > reference had not really been considered. I believe that for clear
> > > implementation guidance we need state what the expected behaviour of
> > > the reference is. I would propose therefore text something like the
> > > following:
> > > >
> > > >"The location URI provide the LIS is a current location reference,
> and
> > > the Target Device should assume that the LIS will determine its
> > > location each time the URI is accessed."
> > > I don't think this is implementation guidance, so much as deployment
> > > guidance
> > > and I'm somewhat concerned as a result.  I believe, in particular,
> that
> > > "the LIS will determine its location each time the URI is accessed"
> > > reflects
> > > a particular deployment mode.   I think it would be better to say
> > > something
> > > like
> > >
> > > "The location URI provided by the LIS is a reference to the most
> > > current available
> > > reference, and the Target Device should understand that it is not a
> > > stable reference
> > > to a specific location".
> > >
> > > To make the reference as current as possible, the LIS may re-determine
> > > a location
> > > for the target, but it is possible it will return the freshest
> > > available data if it
> > > cannot do so or is configured to treat location requests within some
> > > time frame
> > > able to use previous responses (two dereference request within the
> same
> > > second, for example).
> > >
> > > To give a concrete example here, I have in the past made 911 calls to
> > > report
> > > cars broken down on the highway.  If I made such a call while at the
> > > location,
> > > it would be routed to the correct PSAP (since my car and the disabled
> > > vehicle
> > > are at the same place).  But if I continue on, my location URI will
> get
> > > updated
> > > with new locations as I move, and a later dereference will give a
> > > different
> > > location.  We definitely need to make that clear; we may eventually
> > > want
> > > to add functionality to provide a stable reference to a location,
> > > for cases where you want to pass both current and stable.
> > >
> > > 			regards,
> > > 				Ted
> > >
> > >
> > > _______________________________________________
> > > Geopriv mailing list
> > > Geopriv@ietf.org
> > > https://www1.ietf.org/mailman/listinfo/geopriv

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