×

Discussion Board

Results 1 to 8 of 8

Hybrid View

  1. #1
    Registered User
    Join Date
    Jun 2004
    Posts
    1

    How to minimize GPS power consumption

    Hi,

    We are developing a GPS based tracking software for S60 3rd and 5th editions. In our use case, the phone should send it's location to a web service every five or ten minutes.

    As anticipated, power consumption has been quite a challenge. Here's what we have done:
    -GPS chip is turned off as soon as the coordinates are available.
    -Data connection is closed as soon as new location is sent to server.
    -With this method, we are getting only 6-8 hours of battery life. We should get to at least 24 hours.

    One of the ideas we found is to use accelerometer to track device movement and get a new GPS location only if the phone has moved significantly since the last fix. Would this be a viable solution?

    Any other ideas how to minimize battery consumption?

    We've been testing mostly on S60 3rd FP1 (N95 8gb). It seems that with this device, if getting the first GPS fix fails, GPS chip stays on even if it's shut down after failed try. Does anyone know if this has been fixed in 5th edition base devices? In general, what would be the best approach when getting a fix fails? Track phone movement with accelerometer and try again when the phone has moved?

    Thanks for your help!

  2. #2
    Super Contributor
    Join Date
    Mar 2008
    Posts
    1,481

    Re: How to minimize GPS power consumption

    Can it be a solution in your case by using accelerometer since if the phone is moving with constant speed? Also it will take power from phone while we are always checking the acceleration. If you need only rough estimation of location then network based location could be a solution.

  3. #3
    Nokia Developer Expert
    Join Date
    Jan 2007
    Location
    Berlin
    Posts
    22

    Re: How to minimize GPS power consumption

    Quote Originally Posted by pyykkis View Post
    We've been testing mostly on S60 3rd FP1 (N95 8gb). It seems that with this device, if getting the first GPS fix fails, GPS chip stays on even if it's shut down after failed try. Does anyone know if this has been fixed in 5th edition base devices?
    N95 (and friends i believe) keep chip warm. In many usecases this is actually quite nice and doesn't cost much power. Check whether power consumption goes down after 30s/60s. If it's that, than I haven't seen this feature since 3.2 anymore, so you should be safe with 5.0 .

  4. #4
    Registered User
    Join Date
    Oct 2009
    Posts
    3

    Re: How to minimize GPS power consumption

    Hi

    We have studied the problem and published several solutions and the accelerometer solution will buy you something.

    Have a read of our paper:
    Kjaergaard et al. Entracked: energy-efficient robust position tracking for mobile devices
    http://scholar.google.dk/scholar?clu...da&as_sdt=2000

    You can find more papers on the issue here:
    http://person.au.dk/en/mikkelbk@cs.au.dk/pub

  5. #5
    Registered User
    Join Date
    Feb 2011
    Posts
    10

    Re: How to minimize GPS power consumption

    Hie. I have developed an app for mobile tracking on s60 series cellphone using gps reciecver. I wanted to know two qstns

    1) How can I measure the amount of power consumption of my mobile terminal when gps reciever is on?Is there any software availble for this

    2)How can I decrease this power consumption as much as possible..

  6. #6
    Super Contributor
    Join Date
    Mar 2008
    Posts
    1,481

    Re: How to minimize GPS power consumption

    Have you tried to use this Energy profiler (though I have not used it)?
    http://www.forum.nokia.com/Library/T...ck_start.xhtml

    Whenever you don't need location from GPS, good idea to close it. But you have to compromise with other issues

  7. #7
    Registered User
    Join Date
    Feb 2011
    Posts
    10

    Re: How to minimize GPS power consumption

    What is the Average power consumption value when GPS reciever is turned on?

  8. #8
    Registered User
    Join Date
    Apr 2012
    Posts
    3

    Re: How to minimize GPS power consumption

    i dont know how you can see de consumption, but there is a way to se de prower consumption.
    criteria.setPreferredPowerConsumption(criteria.POWER_USAGE_LOW)

    bye !!!

Similar Threads

  1. Power Consumption Problem
    By mohhassan in forum General Development Questions
    Replies: 6
    Last Post: 2009-04-21, 16:46
  2. Nokia N96 vs N95 8Gb - screen backlight power consumption
    By planetf1 in forum General Development Questions
    Replies: 1
    Last Post: 2008-10-17, 02:44
  3. Nokia 12 - Power Consumption
    By kzalei in forum Nokia M2M
    Replies: 5
    Last Post: 2005-04-11, 13:38
  4. Some questions about power consumption
    By pyw in forum Bluetooth Technology
    Replies: 0
    Last Post: 2002-05-28, 11:06

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
×