Method and wireless communication device for energy-based time averaging control for managing radio frequency power

Patent metadata

Field	Value
Publication number	US-11304152-B2
Application number	US-201916710968-A
Country	US
Kind code	B2
Filing date	Dec 11, 2019
Priority date	Dec 11, 2019
Publication date	Apr 12, 2022
Grant date	Apr 12, 2022

Abstract

The present application provides a method and a wireless communication device, which includes detecting one or more operating conditions of the wireless communication device, and determining a normalized energy relative to a monitored energy accumulation over time for each of one or more detected device operating conditions. An amount of already accumulated normalized energy for the detected device operating conditions is compared over an immediately prior window of time. An amount of allowed power to be used during a future sub-period of an upcoming window of time is computed, so as not to exceed an associated limit relative to the overall amount of allowed monitored energy accumulation in each current and upcoming window of time.

First claim

What is claimed is:

1. A method in a wireless communication device, the method comprising:
detecting one or more operating conditions of the wireless communication device, wherein as part of detecting the one or more operating conditions, a power level of a signal being transmitted by the wireless communication device having an associated amount of transmitted energy is detected;
determining a normalized energy relative to a monitored energy accumulation over time for each of one or more detected device operating conditions, wherein the monitored energy accumulation is associated with but is not equal to the amount of transmitted energy of the signal being transmitted by the wireless communication device, and wherein the normalized energy is a conversion between the power level of the signal being transmitted by the wireless communication device, and the amount of the monitored energy accumulation for each of the one or more detected device operating conditions;
comparing an amount of already accumulated normalized energy for the detected one or more device operating conditions over an immediately prior window of time; and
computing an allowed power level to be used for the signal being transmitted by the wireless communication device during a future sub-period of an upcoming window of time, so as not to exceed an associated limit relative to an overall amount of allowed monitored energy accumulation in each current and upcoming window of time.

2. A method in accordance with claim 1 , wherein the monitored energy accumulation corresponds to the heat produced in signal transmission circuitry of the wireless communication device.

3. A method in accordance with claim 1 , wherein the monitored energy accumulation corresponds to energy associated with the signal being transmitted by the wireless communication device being absorbed into a nearby body.

4. A method in accordance with claim 1 , wherein the normalized energy for at least some of the detected device operating conditions are determined as part of a pre-computed modeled effect.

5. A method in accordance with claim 1 , wherein the normalized energy for at least some of the detected device operating conditions include a historically determined measured effect relative to each type of signal being transmitted during a particular type of operating condition.

6. A method in accordance with claim 1 , wherein the window of time has a duration, which is dependent upon the operating condition of the wireless communication device.

7. A method in accordance with claim 6 , wherein the duration of the window of time is dependent upon a frequency of a source of energy responsible for the monitored energy accumulation, wherein the frequency of the source of energy responsible for the monitored energy accumulation being below a predetermined threshold results in a time window having a first duration, and wherein the frequency of the source of energy responsible for the monitored energy accumulation being above a predetermined threshold results in a time window having a second duration, where the second duration is shorter than the first duration.

8. A method in accordance with claim 7 , wherein the source of energy responsible for the monitored energy accumulation can include multiple component sources each having a different frequency, wherein when at least one of the respective different frequencies of the multiple component sources is above the predetermined threshold and at least one of the respective different frequencies is below the predetermined threshold, the time window having the shorter second duration is used.

9. A method in accordance with claim 1 , wherein the computed amount of allowed power can have a different value between at least some of multiple different sub-periods of a particular one of the windows of time.

10. A method in accordance with claim 1 , wherein as part of computing an amount of allowed energy to be used during a future sub-period of an upcoming window of time, an anticipated low energy value is set to a value that corresponds to an amount of power for minimally maintaining an existing connection.

11. A method in accordance with claim 10 , wherein as part of computing an amount of allowed energy to be used during a future sub-period of an upcoming window of time, an anticipated high energy value is set to a value that corresponds to an amount of power for a desired portion of the time window to exceed the anticipated low power value without the accumulated normalized energy over an immediately prior window of operation exceeding an allowed limit.

12. A method in accordance with claim 11 , wherein when an amount of available energy to be allocated to a future sub-period without exceeding the allowed limit for a new immediately prior window of operation, which includes the future sub-period is less than the low energy value that corresponds to an amount of power for minimally maintaining an existing connection, the amount of available energy to be allocated to the future sub-period is set to zero.

13. A method in accordance with claim 1 , wherein an amount of energy used in the future sub-period of the upcoming window of time corresponds to a lesser of the computed amount of allowed power and an amount of energy corresponding to an amount of power, which is desired by an operation of the device during the detected one or more operating conditions.

14. A method in accordance with claim 13 , wherein for each of the sub-periods of the immediately prior window of time, the wireless communication device maintains a record of power.

15. A method in accordance with claim 14 , wherein the record of power for each of the sub-periods corresponds to an amount of power used.

16. A method in accordance with claim 14 , wherein the record of power for each of the sub-periods corresponds to the computed amount of allowed power.

17. A method in accordance with claim 1 , wherein during an initial period of operation in a corresponding mode, prior to having an operation history in the corresponding mode of a duration of at least determined desired window of time, in computing the amount of allowed power to be used during a future sub-period, an amount may be reserved so as to allow for a future sub-period to have available an anticipated low power value amount for minimally maintaining an existing connection during the future sub-period.

18. A method in accordance with claim 1 , wherein computing the amount of allowed power to be used during the future sub-period of the upcoming window of time uses a predefined prototype waveform, which is tracked using the determined normalized energy based on a presently detected one of the one or more operating conditions.

19. A method in accordance with claim 18 , wherein the determined normalized energy will translate to respective power levels that can shift due to differences in the corresponding monitored energy accumulation to normalized energy determination for each of the one or more detected device operating conditions, where the relative relationship between a target energy value, an anticipated low energy value and an anticipated high energy value is the same for each similar type of user interaction with the wireless communication device.

20. A wireless communication device comprising:
a transmitter; and
a controller coupled to the transmitter, the controller including
an operating condition detection module, that detects an operating condition of the wireless communication device, wherein as part of detecting the one or more oper

Assignees

• Motorola Mobility Llc

Inventors

• Krenz Eric
• Abdul-Gaffoor Mohammed

Classifications

• H04W24/08

  Testing, {supervising or monitoring} using real traffic · CPC title

• H04W52/30 Primary

  using constraints in the total amount of available transmission power · CPC title

• H04W52/146

  Uplink power control · CPC title

• H04W52/228 Primary

  using past power values or information · CPC title

• H04W52/367

  Power values between minimum and maximum limits, e.g. dynamic range · CPC title