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-   -   Let's clear this up: A-GPS >> GPS (http://forum.ppcgeeks.com/showthread.php?t=15573)

akijikan 01-07-2008 10:54 PM

Let's clear this up: A-GPS >> GPS
 
I'm really sick and tired of people complaining that the GPS on the mogul will be "only" A-GPS, or "just" A-GPS. A-GPS is much better than GPS. A-GPS actually attempts to fix some issues with GPS:

Quote:

Originally Posted by wikipedia
http://en.wikipedia.org/wiki/Assisted_GPS

* The Assistance Server can locate the phone roughly by what cell site it is connected to on the cellular network.
* The Assistance Server has a good satellite signal, and lots of computation power, so it can compare fragmentary signals relayed to it by cell phones, with the satellite signal it receives directly, and then inform the cell phone or emergency services of the cell phone's position.
* It can supply orbital data for the GPS satellites to the cell phone, enabling the cell phone to lock to the satellites when it otherwise could not, and autonomously calculate its position.
* It can have better knowledge of ionospheric conditions and other errors affecting the GPS signal than the cell phone alone, enabling more precise calculation of position. (See also Wide Area Augmentation System)

As well as using a combination of the assistance server and satellites, some AGPS chipsets can use one exclusively when the other is not available. According to wikipedia the gpsOne chipset in our Mogul is capable of this:

Quote:

Originally Posted by wikipedia
http://en.wikipedia.org/wiki/GpsOne
gpsOne can operate in 4 modes:

* Standalone - Your handset has no connection to the network, and uses only the GPS satellite signals it can currently receive to try and establish a location.
* MS Based - Your handset is connected to the network, and uses the GPS signals + a location signal from the network.
* MS Assisted - Your handset is connected to the network, uses GPS signals + a location signal then relays its 'fix' to the server, which then uses the signal strength from your phone to the network towers to further plot your position. You can still maintain voice communication in this scenario, but not 'Internet/Network service' ie Web Browser, IM, streaming TV etc..
* MS Assisted/Hybrid - Same as above, but network functionality remains. Normally only in areas with exceptional coverage.

So next time you hear someone say "Ugh, it only has A-GPS?" You can scoff too.

bigray327 01-07-2008 11:27 PM

Amen. Thank you!

Pibe38 01-07-2008 11:59 PM

Let's not... thanks for the contribution, however, I can assure this has been posted many times and regardless of how many posts are made the same questions will kepe getting asked over and over again.

Specially the 4 different modes I can personally say have been posted at least a couple of times by Malatesta.

This thread will end in flaming, name calling, etc. etc. so I'm gonna go ahead and close it. I hope you understand... contact me via PM with any questions.


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