A-gps?

[n4v1n]

I know what a-gps is, and I know that in many scenarios, like my n95, you get charged for the data that gets sent back and forth from the phone. Because of this I turned the a-gps feature off and stuck with normal gps so I wouldn't incur charges. So my question is if we would be able to turn off the a-gps feature on the Xperia and use only gps? Thanks.

[JKingGrim]

The Qualcomm msm7200a chipset contains the Qualcomm gpsOne. The gpsOne is capable of running in both assisted and unassisted modes. So assuming it has a GPS antenna built in, it should be capable of running in standalone mode. For instance, I have a mogul with the CDMA version of basically the same chipset. There is a registry edit you can make to enable/disable assisted mode.

With your n95, were you just getting charged for data use, or was it a GPS specific charge? For instance, if you had an unlimited data plan, there would be no extra charge for using assisted GPS right?

[n4v1n]

Yes exactly, It was a data charge from at&t.

[n4v1n]

Originally Posted by JKingGrim

The Qualcomm msm7200a chipset contains the Qualcomm gpsOne. The gpsOne is capable of running in both assisted and unassisted modes. So assuming it has a GPS antenna built in, it should be capable of running in standalone mode. For instance, I have a mogul with the CDMA version of basically the same chipset. There is a registry edit you can make to enable/disable assisted mode.

With your n95, were you just getting charged for data use, or was it a GPS specific charge? For instance, if you had an unlimited data plan, there would be no extra charge for using assisted GPS right?

I read somewhere that AGPS may be the only option because they wanted to keep the size of the XI down. The AGPS apparently doesn't need as much space as a dedicated GPS chipset. If this is the case, then using any sort of navigation would be out of the question because I don't have an unlimted data plan

[JKingGrim]

I do remember hearing that same comment but I don't think it is accurate. I think it is more of a case of the speaker not entirely knowing what they were talking about. I think what he was saying is that there is no separate GPS chipset like a SiRFstar III used in ETEN GPS phones. While the gpsOne is capable of standalone operation, it is not quite as good as a SiRFstar III. I think he was just saying it uses the gpsOne rather than a separate GPS chipset. And I am pretty sure all the machinery required for standalone operation is also required for a-gps in the gpsOne. In a-gps, the handset uses cell towers to get a general idea of where it is, then it starts looking for satellites. the handset still needs to have a gps antenna to capture satellite signals. The only difference is that rather than process those signals onboard, those signals are sent over the internet to a assistance server that uses those signals and cell tower info to calculate the location of the handset, rather than the handset doing its own calculations. It just helps gets a lock much much faster. But since the gps antenna is still present, stand alone operation is still possible. So if it is capable of a-gps, it should be capable of stand alone as well.

I'm no expert, but thats just what I gather. I could be wrong.

[shoey5]

That's exactly it, the GPS One isn't as quick as SirFIII getting a lock on a satellite from a cold start but they have improved it and it's not that bad.

AGPS gets a lock much quicker but it does use data. On the plus side, there are apps written for GPS One that let you download data when synced to your computer, this saves you on data costs and still gives you the benifit provided you sync'd the data recently.

As for using AGPS to make the device slimmer, all they are talking about is using an intigrated chipset solution in the Qualcomm to avoid having additional chips that can make the device bigger. The Qualcomm chipset can lock onto satellites with or without AGPS, AGPS is just an added "enhancement" to getting quicker satellite locks. You can see this in other HTC devices using the Qualcomm chipsets with GPS.

[Massamino]

I wrote Sony Belgium and they told me it was only AGPS and nog regular GPS. So you will need a GPS receiver as well.

[shoey5]

Originally Posted by Massamino

I wrote Sony Belgium and they told me it was only AGPS and nog regular GPS. So you will need a GPS receiver as well.

Again AGPS is GPS with Asissted GPS. Yes it is GPS but you don't need a GPS receiver as well. It's like all the other AGPS HTC devices works as a regular GPS and with AGPS.

[JKingGrim]

Yes. Don't believe everything that Sony reps says. They are not all knowledgeable on everything. Sometimes false info comes even from the horse's mouth. I am thinking Sony Belgium is wrong on this. Like stated, there is either GPS or there isn't. There is no aGPS only on the Qualcomm gpsOne chip.

[cmram12]

So is it possible to use TomTom 6 with it?