[Google Maps API v2] Re: To get the Latitude and Logitude for the 2 bit CELL ID

Hi,

Thanks for you reply.

Actually we are working with 2 Modems, Novatel & Sierra.

Both are 3G. We have verified that by executing the below AT command.

AT+COPS?
+COPS: 0,0,"Telstra Mobile",2

The last value '2' denotes that the modem uses only UTRAN/UMTS/3G
access technology

We execute the AT command mentioned below by having the 2 modems side
by side.

We are able to get the location details for the CELL ID retreived from
the Sierra modem. But with the CELL ID retreived from Novatel we are
not able to get the location.
The format of the CELL ID retrieved in both these Modems are
different.

CELL ID from Novatel: 3792
CELL ID from Sierra: 00D83792

We then convert the CELL IDs into decimal (which are originally in
Hexadecimal) and pass it to this location API as a HTTP request.

Upon further analysis we identified that the CELL ID retrieved in our
version of the Novatel Modem is a 2 byte hexa value, whereas Sierra
returns a 4 byte hex value.

Could you please let us know whether you support the 2 byte CELL ID,
as this is the format all legacy devices support.

If so what conversion we have to make at our end.

Can you please reply ASAP.

Thanks,
Premnath T

On Jun 2, 3:15 pm, Andrew Leach <andrew.leac...@gmail.com> wrote:
> On 2 June 2011 10:46, Premnath <besmilep...@gmail.com> wrote:
>
>
>
> > We are using 3g GSM Network in our modem.
>
> > Is Google database support 2-bit cellid of 3g GSM Network.
>
> There aren't any two-byte cell ids for a 3G network. 3G is UMTS and
> uses four-byte cell ids. Two-byte cell ids indicate a GSM network
> (2G). Older equipment won't be UMTS-compatible and will connect to the
> fallback 2G network, so it will return a GSM two-byte cell id. In fact
> UMTS-compatible equipment may connect to the fallback network if there
> isn't a reliable UMTS connection.
>
> If Google is not providing data for two-byte cell ids, that's probably
> because it doesn't know about those identifiers.
>
> So I guess the answer is no. You can't use two-byte cell ids.
>
> I'm sure the documentation for the API will tell you exactly what's going on.

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