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New Developer
Posts: 14
Registered: ‎12-09-2008
My Device: Not Specified
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GPS power consumption difference?

I've read the API documentation and found that we can set GPS power consumption in criteria, my quetion was how this can affect the device and whats difference between Low, Medium, High? It is affect response time, accuracy or what (beside power consumption ofcourse)? 
Developer
Posts: 1,415
Registered: ‎07-30-2008
My Device: Not Specified

Re: GPS power consumption difference?

You can start with the data sheets,

http://www.sirf.com/products/gps_chip.html

 

they probably have app notes for more complete system issues.

 

New Developer
Posts: 26
Registered: ‎12-03-2008
My Device: Not Specified

Re: GPS power consumption difference?

GPS Power consumption makes a huge difference. It has been my experience with the BB Storm + Verizon that setting power consumption to high (THE DEFAULT) will cause the GPS to not function. It simply changes the GPS status to temporarily unavailable.

 

Currently, I'm using power consumption low, which is extremely accurate (within 30 meters usually).

 

Chris

BlackBerry/Mobile Enthusiast - http://www.riccomini.name
New Developer
Posts: 14
Registered: ‎12-09-2008
My Device: Not Specified

Re: GPS power consumption difference?

why make power consumption low will make GPS accurate? and if low power consumption enough to make device get accurate coordinate then why bother to set high power consumption?
Developer
Posts: 1,415
Registered: ‎07-30-2008
My Device: Not Specified

Re: GPS power consumption difference?

I haven't checked the implementation notes lately but there is also cost. You would need to compare the

performance of a typical chip like the sirf above, to alternative approaches. Presumably power consumption

just refers to the battery in your phone and would be reduced if you can get info from the carriers with

minimal RF power usage but they may charge. I'm not sure what the limits are on this approach

with cooperating carriers but with the simple tower position information it isn't much better than a fraction of a cell size.

 

http://en.wikipedia.org/wiki/GSM_localization

 

Developer
Developer
Posts: 319
Registered: ‎07-20-2008
My Device: Not Specified

Re: GPS power consumption difference?

[ Edited ]

Cost, Accuracy and Power Consumption are all JSR-179 selection criteria.  Instead of explicitly selecting the location provider you want (autonomous(gps), assisted or cellsite) the JSR makes you define a set of acceptable criteria then the API decides which to give you based on the capabilities of the device and network.

 

This link has the table that shows what location providers meet what criteria...

http://www.blackberry.com/knowledgecenterpublic/livelink.exe/fetch/2000/348583/800332/800703/How_To_...

 

 

This link has a table that specified the capabilities of BlackBerry devices...

http://www.blackberry.com/knowledgecenterpublic/livelink.exe/fetch/2000/348583/800332/800703/What_Is...

 

Message Edited by gtj on 01-02-2009 09:47 AM