Respectfully, PIDF-LO is a location object, not designed to carry
point-by-point navigation information.
-Marc-
On 4/8/10 8:30 PM, "Thomson, Martin" <Martin.Thomson@andrew.com> wrote:
> In the interests of Allan's continuing wellbeing, I'll not continue to re-run
> the same points.
>
> Instead, I offer new information.
>
> A colleague just reminded me of a use case that was first raised ~3 years ago
> when I was working with the OMA [1] LOC group. OMA LOC are currently defining
> detailed requirements for a new positioning protocol - LPPe - and amongst the
> work items is work on SET (Device) to SET positioning.
>
> I'll continue to try to find the original presentation, but in lieu of that,
> the synopsis is pretty simple.
>
>
> Using GNSS signals, it is possible to determine the relative position of two
> receivers with greater accuracy than the absolute position of either.
>
> As long as the receivers are close (on a planetary scale), atmospheric errors
> are similar. This is what drives differential GPS, but it has wider
> application.
>
> The most basic use case is relative navigation. One user can be given precise
> directions to their target. Think of the tracking devices you see in the
> movies: "your target is 732 meters away on a bearing of 73 degrees".
>
>
> Option B doesn't support this application. Option A does.
>
> Given that the advantages of either are highly subjective, it seems better to
> base decisions on something tangible.
>
> --Martin
>
>
> p.s. For those with OMA portal access, this document might be interesting:
>
> <http://member.openmobilealliance.org/ftp/Public_documents/LOC/2010/OMA-LOC-20
> 10-0058-CR_LPPe1_0_RD_HighAccuracyRelativePositioning.zip>
>
> For those without, I can provide the document. It is public.
>
>
>
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