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US 7,359,713 B1Granted
Battery consumption optimization for mobile users
AssigneeTrimble Navigation Limited
InventorAnil Tiwari
Life of this patent
Estimating the term…
Abstract
Systems and methods are disclosed to provide power management for a mobile communication device having a location determination function. The frequency of the location determination function may be adjusted based on whether the mobile communication device is moving and may be further adjusted based on battery voltage or expected battery life.
Claims25
A mobile communication device comprising:
- a communication system adapted to receive, over a wireless network, ranging signals for determining a geographical position of the mobile communication device;
- a location determination system coupled with the communication system, the location determination system adapted to receive the ranging signals and determine a geographical location of the mobile communication device;
- a battery coupled with the location determination system, the battery adapted to provide power to the mobile communication device;
- and
- a state machine coupled with the location determination system, the state machine adapted to (a) determine whether the mobile communication device is in a stopped state or a moving state based on a change in the geographical location of the mobile communication device, as determined by the location determination system;
- and (b) control a frequency at which the location determination system determines the geographical location based on (i) whether the mobile communication device is in the stopped state or the moving state and (ii) a level of charge stored in the battery, wherein the frequency comprises a first rate, a second rate, and a third rate of determining the geographical location.
3 more elements
A mobile device comprising:
- a location determination system adapted to receive ranging signals and to determine a position of the mobile device based on the ranging signals;
- a battery coupled with the location determination system, the battery providing power to the location determination system;
- and
- a state machine coupled with the location determination system and adapted to (a) monitor (i) a state of the mobile device based on a change in position of the mobile device determined by the location determination system, and (ii) a level of charge in the battery;
- and (b) control a frequency at which the location determination system determines the position of the mobile device based on the state of the mobile device and the level of charge in the battery, wherein the frequency comprises a first rate, a second rate, and a third rate of determining the position.
2 more elements
A method of providing power management to a mobile device having a location determination function, the method comprising:
- determining whether the mobile device is stationary or moving based on a change in geographical location determined by the location determination function from ranging signals received by the mobile device;
- determining a level of charge stored in a battery which supplies power to the mobile device;
- and
- controlling a frequency at which the location determination function is performed based on (i) whether the mobile device is stationary or moving, and (ii) based on the level of charge in the battery, wherein the frequency comprises a first rate, a second rate, and a third rate of performing.
1 more element
Dependencies are inferred from the claim text.