Anticipation of power on of a mobile device

• US 8,510,581 B2
• Filed: 03/26/2007
• Issued: 08/13/2013
• Est. Priority Date: 03/26/2007
• Status: Active Grant

• Current Assignee: NXP USA, Inc. (NXP Semiconductors NV)
• Original Assignee: Freescale Semiconductor, Inc. (NXP Semiconductors NV)
• Inventors: Carvalho, Jose Mendes, Cotdeloup, Fabrice, Rodriguez, Yaney
• Primary Examiner(s): Abbaszadeh, Jaweed A
• Application Number:
  US12/531,914
• Publication Number:
  US 20100115309A1
• Time in Patent Office: 2,332 Days
• Field of Search: 713/2, 713/300, 713/310, 713/320, 713/324, 713/330, 713/323
• US Class Current: 713/323
• CPC Class Codes: G06F 1/32 Means for saving power

Abstract

A method of managing the power up of a device that has power down state and at least two power up states. The method includes statistically analyzing the power up time profile of the device. The method also includes determining one or more predetermined statistical indicators associated with the stored power up time profile. The method further includes calculating an anticipated start up time from the statistical indicators. The method also includes at the anticipated start up time changing the device state from the power down state to a predetermined one of the power up states depending on the statistical indicators. The method further includes maintaining the device at predetermined power up states for a predetermined duration. The method also includes returning the device to the power down state if there is no user interaction with the device during the predetermined duration.

Claims

1. A method of managing the power up of a device that has a power down state, at least two power up states, and a run state, wherein the method comprises:

statistically analysing a power up time profile of the device;

determining one or more predetermined statistical indicators associated with the power up time profile;

calculating an anticipated time for a user power up of the device to the run state based on the one or more predetermined statistical indicators;

at a predetermined amount of time before the anticipated time for the user power up of the device, changing a device state from the power down state to a first predetermined power up state of the at least two power up states in response to the predetermined amount of time being less than a first threshold, and changing the device state from the power down state to a second predetermined power up state of the at least two power up states in response to the predetermined amount of time being more than the first threshold and less than a second threshold; and

powering up the device from the first predetermined power up state or the second predetermined power up state to the run state during the user power up in response to a user interaction with the device during a predetermined duration, otherwise maintaining the device at the predetermined one of the at least two power up states for the predetermined duration and then returning the device to the power down state if there is no user interaction with the device during the predetermined duration.

2. The method of claim 1, further comprising storing the power up time profile of the device on the device.

3. The method of claim 1, wherein the step of determining the one or more predetermined statistical indicators comprises determining an average amount of time that the device is powered down and a standard deviation associated therewith based on a Gaussian distribution.

4. The method of claim 1, further comprising the step of selecting one of the at least two power up states of the device based on at least one of the one or more predetermined statistical indicator.

5. The method of claim 1, wherein the step of maintaining the device at the predetermined one of the at least two power up states comprises maintaining the device at a lowest power up state, such that power in the device is conserved.

6. The method of claim 1, further comprising statistically analysing a frequency of power up time in time bands and deleting frequencies below a predetermined threshold from the step of determining the one or more predetermined statistical indicators.

7. The method of claim 1, further comprising calculating a next anticipated point in time to start up the device from the one or more predetermined statistical indicators when there is no user interaction during the predetermined duration.

8. The method of claim 1, further comprising regularly updating the power up time profile of the device.

9. The method of claim 2, wherein the user power up is to a highest power level for the device.

10. The method of claim 1, wherein the first threshold is when the predetermined amount of time is two times a standard deviation of an average length of time that the device is powered down.

11. The method of claim 1, further comprising:

determining an amount of time for a most recent power down duration;

if the amount of time for the most recent duration is less than the predetermined amount of time, at a predetermined amount of time before a next anticipated time for the user power up of the device, changing the device state from the power down state to the first predetermined power up state of the at least two power up states in response to the predetermined amount of time being less than the first threshold, and changing the device state from the power down state to the second predetermined power up state of the at least two power up states in response to the predetermined amount of time being more than the first threshold and less than the second threshold; and

if the amount of time for the most recent duration is more than the predetermined amount of time, not changing the device state at the predetermined amount of time before the next anticipated time for the user power up of the device.

12. A power management control module for managing power up of a device that has a power down state, at least two power up states, and a run state, the power management control module comprising:

a detector to detect a power up time profile of the device;

a processor to calculate one or more predetermined statistical indicators associated with the power up time profile; and

a controller to determine an anticipated time for a user power up of the device to the run state based on the one or more predetermined statistical indicators, and at a predetermined amount of time before the anticipated time for the user power up of the device, to change a device state from the power down state to a first predetermined power up state of the at least two power up states in response to the predetermined amount of time being less than a first threshold, and to change the device state from the power down state to a second predetermined power up state of the at least two power sup states in response to the predetermined amount of time being more than the first threshold and less than a second threshold, and the controller powers up the device from the first predetermined power up state or the second predetermined power up state to the run state during the user power up in response to a user interaction with the device during a predetermined duration, otherwise the controller maintains the device at the predetermined one or the at least two power up states for the predetermined duration and then returns the device to the power down state if there is no user interaction with the device during the predetermined duration.

13. The power management control module of claim 12, wherein the power up time profile of the device is stored on the device.

14. The power management control module of claim 12, wherein the processor determines a mean power down time and a standard deviation associated therewith based on a Gaussian distribution.

15. The power management control module of claim 12, wherein a selected power up state is dependent on at least one statistical indicator.

17. The power management control module of claim 12, wherein multiple power up time profiles may exist for a specific user.

18. A device including a power management control module in accordance of claim 12.

19. The device of claim 18, in the form of a mobile phone.

16. A power management control module for managing power up of a device that has a power down state, at least two power up states, and a run state, the power management control module comprising:

a detector to detect the power up time profile of the device;

a processor to detect one or more predetermined statistical indicators associated with a power up time profile; and

a controller to determine an anticipated start up time for the device to the run state based on the one or more predetermined statistical indicators, and at the anticipated start up time changing a device state from the power down state to a first predetermined power up state in response to the predetermined amount of time being less than a first threshold, and to change the device state from the power down state to a second predetermined power up state in response to the predetermined amount of time being more than the first threshold and less than a second threshold, wherein the controller maintains the device at the predetermined power up state for a predetermined duration and returns the device to the power down state if there is no user interaction with the device during the predetermined duration, wherein the controller powers up the device from the first predetermined power up state or the second predetermined power up state to the run state during the user power up in response to a user interaction with the device during a predetermined duration, and wherein the controller monitors battery power levels and any user alarms associated with the device to assist with a calculation of a required power up time and state.

20. A non-transitory computer readable medium having a computer program stored thereon comprising instructions, that when executed, carry out the steps comprising:

statistically analysing a power up time profile of a device, the device has a power down state, at least two power up states, and a run state;

determining one or more predetermined statistical indicators associated with the power up time profile;

calculating an anticipated time for a user power up of the device to the run state based on the one or more predetermined statistical indicators;

at a predetermined amount of time before the anticipated time for the user power up of the device, changing a device state from the power down state to a first predetermined one of the at least two power up states in response to the predetermined amount of time being less than a first threshold, and to changing the device state from the power down state to a second predetermined power up state in response to the predetermined amount of time being more than the first threshold and less than a second threshold;

powering up the device from the first predetermined power up state or the second predetermined power up state to the run state during the user power up in response to a user interaction with the device during a predetermined duration, otherwise maintaining the device at the predetermined one or the at least two power up states for the predetermined duration and then returning the device to the power down state if there is no user interaction with the device during the predetermined duration.