R: Need info on AGPS

Marc Verwerft marc.js.verwerft at gmail.com
Thu Jan 25 15:39:43 CET 2007


Michele,

Robert already had quite some info on the AGPS, even before I asked
the question.
Have a look at http://lists.openmoko.org/pipermail/community/2006-November/000118.html

Regards,

Marc.

On 1/25/07, Michele Manzato <michele.manzato at verona.miz.it> wrote:
> Some additional questions on this subject:
>
> 1. Is there any "A-GPS standard" whatsoever?
> 2. I have heard elsewhere (Wikipedia) that in A-GPS the computation effort
> is shared between the device and the A-GPS Server. According to a previous
> post, the device just downloads the ephemeris table so there isn't any
> actual "computation sharing", but rather a download of a pre-computed table
> download. Correct?
> 3. A-GPS involves additional data traffic and thus (potential) additional
> costs. Does it use a normal GSM/GPRS IP-based data transfer? does it use
> some out-of-band GSM/GPRS control messages? or does it get data from
> broadcasts in the local cell (e.g. GSM cell-broadcast)?
> 4. if the answer to above is GPRS: is it possible to estimate in advance how
> much additional traffic (in Kbytes/day of full operation)?
> 5. Are there any known estimations on the overall (A)GPS performance on the
> Neo (esp. fix time)
> 6. Coming to the Neo1973. In order to save costs, can the "Assisted"
> function in A-GPS be disabled through software API?
> 7. Is it possible to tell whether A-GPS is actually in use or not?
> 8. Is it possible to tell/know which is the A-GPS server currently in use?
>
> I realise that 1..6 of the above are indeed general questions about A-GPS
> technology, not really specific to the Neo or to OpenMoko. Sorry it I sound
> a bit off-topic, but I did not find them answered plainly anywhere.
> Reference links would be great.
>
> Many thanks in advance!
> Michele
>
> -----Messaggio originale-----
> Da: community-bounces at lists.openmoko.org
> [mailto:community-bounces at lists.openmoko.org] Per conto di Michael 'Mickey'
> Lauer
> Inviato: giovedì 25 gennaio 2007 1.01
> A: community at lists.openmoko.org
> Oggetto: Re: Need info on AGPS
>
> NOTE: please send mails in text format
>
> Marc Verwerft wrote:
> >The chip in the Neo1973 is a Global Locate AGPS. Anybody know what type?
> Hammerhead maybe?
>
> I think Sean already confirmed that it is indeed the Hammerhead chipset.
>
> Regards,
>
> :M:
> --
> Michael 'Mickey' Lauer | IT-Freelancer | http://www.vanille-media.de
>
>
> _______________________________________________
> OpenMoko community mailing list
> community at lists.openmoko.org
> https://lists.openmoko.org/mailman/listinfo/community
>
> --
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.1.410 / Virus Database: 268.17.10/651 - Release Date: 24/01/2007
>
>
> --
> No virus found in this outgoing message.
> Checked by AVG Free Edition.
> Version: 7.1.410 / Virus Database: 268.17.10/651 - Release Date: 24/01/2007
>
>
> _______________________________________________
> OpenMoko community mailing list
> community at lists.openmoko.org
> https://lists.openmoko.org/mailman/listinfo/community
>




More information about the community mailing list