METHOD AND DEVICE FOR CALIBRATING AND UPDATING A POWER MODEL

• US 20140268198A1
• Filed: 03/14/2013
• Published: 09/18/2014
• Est. Priority Date: 03/14/2013
• Status: Active Grant

• Current Assignee: Xerox Corporation (Xerox Holdings Corp.)
• Original Assignee: Xerox Corporation (Xerox Holdings Corp.)
• Inventors: Ebner, Fritz Francis
• Granted Patent: US 10,372,842 B2
• Time in Patent Office: Days
• US Class Current: 358/1.13
• CPC Class Codes: G06F 30/20 Design optimisation, verification or simulation optimisation, verification or simulation of circuit designs G06F30/30
• CPC Class Codes: H04N 1/00885 Power supply means, e.g. arrangements for the control of power supply to the apparatus or components thereof

Abstract

A method and device for calibrating a power model for a multi-state device. The device includes a processor and a computer readable medium containing instructions to instruct the processor to perform the method. The method includes receiving a device state log comprising a time-based representation of multi-state device states for a first period of time and a power trace comprising a time-based representation of power consumed by the multi-state device for the first period of time; eroding the device state log to reduce potential noise present at state transitions within the device state log, thereby producing an eroded device state log; determining energy consumption for each state transition in the eroded power state log; creating an updated power model for the multi-state device based upon the eroded power state log; and storing the updated power model in a non-transitory computer readable medium operably connected to the multi-state device.

Claims

1. A method of calibrating a power model for a multi-state device, the method comprising:

receiving, at a processing device, a device state log comprising a time-based representation of multi-state device states for a first period of time and a power trace comprising a time-based representation of power consumed by the multi-state device for the first period of time;

eroding, by the processing device, the device state log to reduce potential noise present at state transitions within the device state log, thereby producing an eroded device state log;

determining, by the processing device, energy consumption for each state transition in the eroded power state log;

creating, by the processing device, an updated power model for the multi-state device based upon the eroded power state log; and

storing, by the processing device, the updated power model in a non-transitory computer readable medium operably connected to the multi-state device.

2. The method of claim 1, further comprising replacing the power model of the device with the updated power model.

3. The method of claim 1, further comprising:

prior to eroding the device state log, aligning the device state log and the power trace to compensate for any time deviations.

4. The method of claim 1, further comprising:

determining, by the processing device, mean and peak values for each power state in the eroded power state log; and

creating, by the processing device, an initial estimate of a state power trace based upon the mean and peak values and the eroded device state log.

5. The method of claim 4, wherein eroding the device state log comprises setting a state value for each transition to zero.

6. The method of claim 5, wherein calculating the mean and peak values for each state in the eroded power state log comprises calculating a mean and peak value for each non-zero state.

7. The method of claim 1, further comprising smoothing the power trace to reduce overall noise.

8. The method of claim 7, wherein smoothing the power trace comprises applying a moving average to filter the power trace.

9. The method of claim 1, wherein creating the initial estimate of the state power trace comprises replacing each state value in the eroded power state log with a corresponding mean state power value.

10. A device for calibrating a power model for a multi-state device, the device comprising:

a processor; and

a non-transitory computer readable medium operably connected to the processor, the computer readable medium containing a set of instructions configured to instruct the processor to;

receive a device state log comprising a time-based representation of multi-state device states for a first period of time and a power trace comprising a time-based representation of power consumed by the multi-state device for the first period of time,

erode the device state log to eliminate potential noise present at state transitions within the device state log, thereby producing an eroded device state log,

determine energy consumption for each state transition in the eroded power state log,

create an updated power model for the multi-state device based upon the eroded power state log, and

store the updated power model in at least the non-transitory computer readable medium.

11. The device of claim 10, wherein the set of instructions further comprises instructions configured to instruct the processor to replace the power model of the device with the updated power model.

12. The device of claim 10, wherein the set of instructions further comprises instructions configured to instruct the processor to align the device state log and the power trace to compensate for any time deviations prior to eroding the device state log.

13. The device of claim 10, wherein the set of instructions further comprises instructions configured to instruct the processor to:

determine mean and peak values for each power state in the eroded power state log; and

create an initial estimate of a state power trace based upon the mean and peak values and the eroded device state log.

14. The device of claim 13, wherein the set of instructions for eroding the device state log further comprise instructions configured to instruct the processor to set a state value for each transition in the device state log to zero.

15. The device of claim 14, wherein the set of instructions for calculating the mean and peak values for each state in the eroded power state log further comprise instructions configured to instruct the processor to calculate a mean and peak value for each non-zero state.

16. The device of claim 10, wherein the set of instructions is further configured to instruct the processor to smooth the power trace to reduce overall noise.

17. The device of claim 16, wherein the set of instructions for smoothing the power trace further comprise instructions configured to instruct the processor to apply a moving average to filter the power trace.

18. The device of claim 10, wherein the set of instructions for creating the initial estimate of the state power trace further comprise instructions configured to instruct the processor to replace each state value in the eroded power state log with a corresponding mean state power value.

19. A method of calibrating a power model for a multifunction printing device, the method comprising:

receiving, at a processing device, a device state log comprising a time-based representation of multifunction print device states for a first period of time and a power trace comprising a time-based representation of power consumed by the multifunction print device for the first period of time, wherein each of the device states represents a specific function the multifunction print device is configured to perform;

eroding, by the processing device, the device state log to reduce potential noise present at state transitions within the device state log, thereby producing an eroded device state log;

determining, by the processing device, energy consumption for each state transition in the eroded power state log;

creating, by the processing device, an updated power model for the multifunction print device based upon the eroded power state log; and

storing, by the processing device, the updated power model in a non-transitory computer readable medium operably connected to the multifunction print device.

20. The method of claim 19, further comprising replacing the power model of the device with the updated power model.

21. The method of claim 19, further comprising:

determining, by the processing device, mean and peak values for each power state in the eroded power state log; and

creating, by the processing device, an initial estimate of a state power trace based upon the mean and peak values and the eroded device state log.

22. The method of claim 21, wherein eroding the device state log comprises setting a state value for each transition to zero.

23. The method of claim 22, wherein calculating the mean and peak values for each state in the eroded power state log comprises calculating a mean and peak value for each non-zero state.

24. The method of claim 19, wherein creating the initial estimate of the state power trace comprises replacing each state value in the eroded power state log with a corresponding mean state power value.