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344 posts

Ultimate Geek
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  Reply # 214072 11-May-2009 12:11
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Hi Guys,

 Been lurking for a while, but though a post was in order...

Network-based positioning is used by many OEMs to get around the fact that some operators have not implimented their own Network Based GPS. It also enables devices that do not have a GPS chipset to provide some for of LBS.


The device can still be located fairly accurately in terms of longitude and latitude. The application can use the location API to acquire the location (longitude and latitude). In network-based positioning, the data comes from a server that contains a database of Cell ID's and their location (example, supl.nokia.com, Ericsson MPS)


The server has information about the cell ID and its longitude and latitude. The device asks the location over the network and the server pass from the data base to the devices.

Been using NBP for a while... seems to do the trick :-)

Felix


4025 posts

Uber Geek
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  Reply # 214152 11-May-2009 16:49
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steve98:Hi eXDee -- what program are you using on your Okta Touch that utilises triangulation of cell towers to approximate your position?!

Im not 100% sure its triangulation, but it locks a lot faster than standalone, i have no data connection so its not AGPS or any other server.
I got the reference from XDADevelopers in a discussion about the titan
[HKLM\Software\HTC\SUPL AGPS]
---> GPSMode=4

NOTE: Valid options are: 1 for standalone mode (no assistance), 2 for server assistance mode (default), 4 for server assistance/hybrid mode.

I do not know exactly what hybrid mode (mode 4) does, but I suspect it uses a combination of cell tower triangulation (less accurate) and gps triangulation (more accurate) to obtain/maintain a fix. Some users have reported faster GPS fixes with the mode set to 4 and I personally use this setting. I can usually get a fix (even indoors) with this setting in less than 30 seconds. With the GPS mode set to 2 (default), I can normally get a fix within 60 seconds, so it is a marginal improvement, and I am not sure at what cost I obtain the improvement (less accuracy possibly). Of course, this could be a placebo affect but it seems to work well for me. ;)

As you'd imagine, im using mode 4, and its a lot faster in locking than mode 1.

As for software im using Tomtom navigator 7 with AstroGPSLauncher to initilize the GPS.

 
 
 
 


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Uber Geek
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  Reply # 214168 11-May-2009 18:09
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Might do the same on my HTC Titan and see if that brings quicker locks also.




- Telstra HTC Touch Pro2 - Energy ROM WM6.5.5 20 Oct/Cyanogen Mod Froyo 2.2 - R.I.P
- AT&T Galaxy S Captivate 16GB on XT (now with brother)
- Samsung Galaxy S2 on XT- Runs ICS 4.0.3 Resurrection Remix 9.2
- Business Hours - Work In The Electricity Industry, After Hours - DJ/Turntablist - Will Scratch Vinyl For Free'
- What's next??? S3?

2 posts

Wannabe Geek


  Reply # 219233 29-May-2009 11:46
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Can someone tell me why on launch day they still can't put up a map or tell me on 123 whether i can get coverage. Or answer the eternal question of where the nearest cell tower is.

I need coverage and can't get itas is. Will XT improve anything if you don't live in town.

324 posts

Ultimate Geek


  Reply # 219236 29-May-2009 11:50
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where do you live? XT should have enough coverage

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Master Geek
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  Reply # 219242 29-May-2009 12:16
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dont think they're allowed to tell anyone where the cell towers are located, but if you call *123, tell them what street your own or area, they should actually be able to tell you what the coverage is like. also, you can find it on telecom website, i think!?




alvstar2001

374 posts

Ultimate Geek
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  Reply # 219245 29-May-2009 12:23
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New Zealand XT Mobile Coverage: http://www.telecom.co.nz/mobile/ournetwork/coverage




Current Phone:
- Android: Samsung SM-G900F Galaxy S5 (XT)
- Win Phone 8: Samsung ATIV S (XT)

Current Tablet:

 

- Acer Iconia 7" Android Tablet

 

Twitter: qraider


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Wannabe Geek


  Reply # 219248 29-May-2009 12:26
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We live about 15 km North of Hukerenui in Northland (abouth 30km as the crow flies NE of whangarei). Currently get a whole 1 bar of signal if you stand in the right place. Not enough for a phone call, can occasionally get a txt. T stick doesn't work without trekking to the top ridge.

I'm guessing that we will probably still be one of the 3%. It would be great to be wrong though.

As for giving them the address they can't even find our road. Spent quite a bit of time on the phone this morning, and still none the wiser.

The map doesn't cover us either.

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