Adaptive Doze to Hibernate

• US 20170308148A1
• Filed: 08/29/2016
• Published: 10/26/2017
• Est. Priority Date: 04/20/2016
• Status: Active Grant

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Inventors: Soliman, M. Nashaat, Maisuria, Paresh, Kishan, Arun U.
• Granted Patent: US 10,198,059 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 1/263 Arrangements for using multiple switchable power supplies, e.g. battery and AC G06F1/30 takes precedence
• CPC Class Codes: G06F 1/3212 Monitoring battery levels, e.g. power saving mode being initiated when battery voltage goes below a certain level
• CPC Class Codes: G06F 1/3231 Monitoring the presence, absence or movement of users
• CPC Class Codes: G06F 1/3296 by lowering the supply or operating voltage
• CPC Class Codes: G06F 9/4418 Suspend and resume; Hibernate and awake
• CPC Class Codes: Y02D 10/00 Energy efficient computing, e.g. low power processors, power management or thermal management

Abstract

Adaptive doze to hibernate scheme techniques are described for power management of a computing device. Rather than relying upon a fixed timer to control device power states, the adaptive doze to hibernate scheme monitors various hibernate parameters and adapts the hibernation experience in dependence upon the parameters. The hibernate parameters may include but are not limited to a standby budget, minimum standby time, reserve screen on time, and indications of user presence. In operation, a power manager monitors battery drain rate and adaptively determines when to change the device power states of the computing device based on the observed drain rate and the hibernate parameters. The power manager may selectively switch between various states (e.g., high performance, active, wake, standby, hibernate, off, etc.) accordingly.

Claims

1. A method implemented by a computing device, the method comprising:

monitoring battery drain rate in connection with a power management scheme for the computing device; and

controlling switching between power states implemented by the power management scheme based on observed drain rate and hibernate parameters that establish a policy for transitions between the power states.

2. The method of claim 1, wherein the power states implemented by the power management scheme include at least a standby state and a hibernate state.

3. The method of claim 1, wherein monitoring battery drain rate comprises monitoring usage of an energy storage device system of the computing device.

4. The method of claim 1, wherein switching between power states is further based on indications of user presence.

5. The method of claim 1, wherein the hibernate parameters include one or more of a standby budget, minimum standby time, reserve screen on time, or indications of user presence.

6. The method of claim 1, wherein the power management scheme defines a hierarchy of states for power management that span a range from high power and high performance to minimal or no power usage.

7. The method of claim 6, wherein the hierarchy of states includes two or more of a high performance state, an active state, a wake state, a standby state, a hibernate state, or an off state.

8. The method of claim 1, wherein switching between power states occurs in dependence upon the observed drain rate and a configurable budget parameter set to control an amount of power available over a period of time for consumption in a designated state from which a transition is being made.

9. The method of claim 1, wherein switching between power states occurs in dependence upon the observed drain rate and a configurable reserve parameter that specifies one or more of an amount of reserved time or an amount of reserved power to maintain for device readiness.

10. The method of claim 1, wherein causing switching occurs in dependence upon the observed drain rate and a configurable time parameter that specifies an amount of time to stay in a current state before transitioning to a different selected state is enabled.

11. The method of claim 1, wherein causing switching between power states comprises communicating control signals to direct operation of hardware components to switch to states indicated by the control signals.

12. A method implemented by a computing device, the method comprising:

detecting operation of the computing device in a standby state implemented by a power management scheme for the computing device;

obtaining drain rate data indicative of power drain rates for an energy storage device system of the computing device while in the standby state; and

selectively triggering a switch to a hibernate state implemented by the power management scheme based on the observed drain rate and a policy established for transitions between the standby state and the hibernate state.

13. The method as recited in claim 12, wherein the policy is established based on hibernate parameters including one or more of a standby budget, minimum standby time, reserve screen on time, or indications of user presence.

14. The method as recited in claim 12, wherein the policy specifies a standby budget parameter set to control an amount of power available over a period of time for consumption in the standby state.

15. The method as recited in claim 14, wherein when the amount of power specified by the standby budget parameter is depleted, the system is configured to skip past the standby state and enter the hibernate state.

16. The method as recited in claim 12, wherein the policy specifies a reserve parameter that specifies one or more of an amount of reserved time or an amount of reserved power to maintain for device readiness.

17. The method as recited in claim 12, wherein the policy provides an option for a user to opt-in to device usage and location tracking used to obtain indications of user presence.

18. The method as recited in claim 17, wherein when the user to opts-in to device usage and location tracking, selectively triggering the switch to the hibernate state occurs in dependence upon indications of user presence.

19. The method as recited in claim 12, wherein the policy specifies a minimum standby time setting configured to designate an amount of time to remain in standby mode before transitioning to hibernate is enabled.

20. A computing device comprising:

an energy storage device system including one or more energy storage devices;

one or more processors; and

one or more computer-readable storage media having stored thereon instructions that, responsive to execution by the one or more processors, implement a power manager to perform operation comprising;

detecting operation of a computing device in a standby state implemented by a power management scheme for the computing device;

obtaining drain rate data indicative of power drain rates for an energy storage device system of the computing device while in the standby state; and

selectively triggering a switch to a hibernate state implemented by the power management scheme based on the observed drain rate and a policy established for transitions between the standby state and the hibernate st