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Re: First Draft Spec - Dead Reckoning Interface

From: Rees, Kevron <kevron.m.rees@intel.com>
Date: Fri, 9 May 2014 08:57:15 -0700
Message-ID: <CAFW5wYZ5V+PH81Wx+=y3Vcs9Cn4xCZgCCw0_B91bUpEqxh7zzQ@mail.gmail.com>
To: ALDRIC LOYER <aldric.loyer@mpsa.com>
Cc: "public-autowebplatform@w3.org" <public-autowebplatform@w3.org>, 박종선(Justin Park) <jongseon.park@lge.com>, Paul Boyes <pb@opencar.com>
I agree with Aldric.  The changes makes sense.

On Fri, May 9, 2014 at 8:47 AM, ALDRIC LOYER <aldric.loyer@mpsa.com> wrote:
> Hi All,
> I think we should review the "DeadReckoning interface" for the following reasons :
> 1/ The Steering wheel angle is actually not used in algorithms for Dead reckoning processing.
> 2/ WheelTickSensor attribute should distinguish rear left wheel and rear right wheel. If there is only one attribute for both, I don't understand how can it work.
> 3/ Additionally, dead reckoning algorithms also uses the reverse gear shift indication, but we already have the TransmissionMode interface for that.
> 4/ Finally, some suppliers use a cape to compute the Dead reckoning (provided by an accelerometer) instead of the wheel ticks, and we don't know if in the future other strategies will appear.
>
> My overall position concerning this interface is that "dead reckoning" is an application software component and then we shouldn't predefine what data are needed for this kind of function.
> The Vehicle Data API specification should only give access to a set of data that one can use to compute its own Dead Reckoning function.
>
> In conclusion my proposal is the following :
> - Remove the DeadReckoning Interface.
> - Add a WheelTickSensor interface for each wheel. Furthermore, this information can be useful for many other use cases (detect a slippery road, estimate a low tire pressure,  ...)
> - Add a SteeringWheelAngle Interface. Indeed, even if not needed for Dead Reckoning,  Steering wheel angle can be useful for many other use cases and then we really need a specific API for that.
>
> I propose to address also that point on Tuesday.
> For the rest every thing is okay for me.
>
> Thank you very much to all contributors.
>
> --------------------------------------------------------------------------
> Aldric LOYER
> PSA Peugeot Citroën
> Responsable de l'UEI COTI
> (Connectivity, Telematic and Infotainment)
> Direction de la Recherche et de l'Ingénierie Avancée
> Tel : +33 (0) 1 57 59 81 35 (20 81 35)
> Portable : +33 6 32 34 55 59
Received on Friday, 9 May 2014 15:57:43 UTC

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