Power control in schedulable wireless communication terminal

• US 8,145,251 B2
• Filed: 01/23/2006
• Issued: 03/27/2012
• Est. Priority Date: 01/23/2006
• Status: Active Grant

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola Mobility, Inc. (Lenovo Group Ltd.)
• Inventors: Klomsdorf, Armin W., Nangia, Vijay, Nory, Ravikiran, Schwent, Dale G., Stewart, Kenneth A., Wilson, David R., Love, Robert T., Classon, Brian K., Fernandes, Edgar P.
• Primary Examiner(s): Edouard, Patrick
• Assistant Examiner(s): HEIBER, SHANTELL LAKETA
• Application Number:
  US11/337,753
• Publication Number:
  US 20070173276A1
• Time in Patent Office: 2,255 Days
• Field of Search: 455/450, 455/522, 455/572, 455/574, 455/127.5, 455/127.1, 455/343.1, 455/343.5
• US Class Current: 455/522
• CPC Class Codes: H04L 5/0066 Requirements on out-of-channel emissions
• CPC Class Codes: H04W 28/04 Error control
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/262 taking into account adaptive modulation and coding [AMC] scheme AMC per se H04L1/0001
• CPC Class Codes: H04W 52/367 Power values between minimum and maximum limits, e.g. dynamic range
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

A wireless communication entity schedulable in a wireless communication network, including a controller (603) communicably coupled to a power amplifier (608), wherein the controller varies a maximum transmit power of the wireless communication entity based on the radio resource assignment information receiver by the radio receiver.

Claims

1. A method in a schedulable wireless communication entity having an operational maximum power level and that communicates in a wireless communication network, the method comprising:

receiving, at the wireless communication entity, a radio resource assignment,

the radio resource assignment includes resources in a frequency band;

varying an operational maximum power level of the wireless communication entity based on the radio resource assignment,

the operational maximum power level limits an instantaneous power at which the wireless communication entity may transmit.

2. The method of claim 1,

obtaining maximum transmit power adjustment information based on the radio resource assignment from reference information stored on the wireless communication entity,

varying the operational maximum power level of the wireless communication entity based on the maximum transmit power adjustment information obtained.

3. The method of claim 1, varying the operational maximum power level includes decreasing the operational maximum power level as bandwidth allocated to the wireless communication entity increases and increasing the operational maximum power level as bandwidth allocated to the wireless communication entity decreases.

4. The method of claim 1, varying the operational maximum power level includes

decreasing the operational maximum power level as the allocated radio resources are positioned in frequency closer to an edge of the frequency band within which the radio resource is allocated, and

increasing the operational maximum power level as the allocated radio resources are positioned in frequency farther from an edge of the frequency band within which the radio resource is allocated.

5. The method of claim 1,

the radio resource assignment includes a time-frequency resource,

varying the operational maximum power level based on a waveform metric derived from the allocated time-frequency resource.

6. The method of claim 1, varying the operational maximum power level of the wireless communication entity based on distance to an adjacent frequency band.

7. The method of claim 1, varying the operational maximum power level of the wireless communication entity based on a frequency band allocated to the wireless communication entity.

8. The method of claim 1, de-rating the operational maximum power level of the wireless communication entity in accordance with frequency bands adjacent to the frequency band within which the radio resource was allocated.

9. The method of claim 1, varying the operational maximum power level of the wireless communication entity in accordance with a wireless communication technology deployed in a frequency band adjacent to the frequency band including the radio resource allocated to the wireless communication entity.

10. The method of claim 1,

the radio resource assignment includes a time-frequency resource,

varying the operational maximum power level based on the allocated time-frequency resource.

11. The method of claim 1, the operational maximum power level is based on a rated maximum transmit power, wherein the rated maximum transmit power level corresponds to a power class supported by the wireless communication entity.

12. The method of claim 1, the operational maximum power level is based on a difference between a rated maximum transmit power and maximum transmit power adjustment information based on the radio resource assignment from reference information stored on the wireless communication entity.

13. The method of claim 1, the operational maximum power level is based on a difference between a rated maximum transmit power and a function of a waveform power derating and an occupied bandwidth power derating.

14. A wireless communication entity schedulable in a wireless communication network, the wireless communication entity comprising:

a radio receiver, the radio receiver receiving a radio resource assignment information including a bandwidth allocation;

a power amplifier;

a controller communicably coupled to the power amplifier,

the controller varying a operational maximum power level of the wireless communication entity based on a size of the bandwidth allocation,

wherein the operational maximum power level limits an instantaneous power at which the wireless communication entity may transmit.

15. The wireless communication entity of claim 14, the radio resource assignment includes a time-frequency resource, the controller varying the operational maximum power level based on a waveform metric.

16. The entity of claim 14, the controller varying the instantaneous transmit power of the wireless communication entity based on maximum power adjustment information received from the wireless communication network.

17. The wireless communication entity of claim 14, varying the operational maximum power level includes decreasing the operational maximum power level as the size of the bandwidth allocation to the wireless communication entity increases and increasing the operational maximum power level as the size of the bandwidth allocation to the wireless communication entity decreases.

18. The wireless communication entity of claim 14, the radio resource assignment information including modulation information, varying the operational maximum power level based on the modulation information.

19. The wireless communication entity of claim 14, the bandwidth allocation includes multiple subcarriers, varying the operational maximum power level based on a number of subcarriers in the bandwidth allocation.

20. The wireless communication entity of claim 14, the radio resource assignment includes a time-frequency resource, the controller varying the operational maximum power level based on the allocated time-frequency resource and based on reference information stored on the wireless communication entity.

21. The wireless communication entity of claim 14, wherein the operational maximum power level is based on a rated maximum transmit power, wherein the rated maximum transmit power level corresponds to a power class supported by the wireless communication entity.

22. The wireless communication entity of claim 14, wherein the operational maximum power level is based on a difference between a rated maximum transmit power and maximum transmit power adjustment information based on the radio resource assignment from reference information stored on the wireless communication entity.

23. The wireless communication entity of claim 14, wherein the operational maximum power level is based on a difference between a rated maximum transmit power and a function of a waveform power derating and an occupied bandwidth power derating.