Power control in ad-hoc wireless networks

• US 20050176455A1
• Filed: 02/05/2004
• Published: 08/11/2005
• Est. Priority Date: 02/05/2004
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Krishnan, Ranganathan, Rajkotia, Amol
• Granted Patent: US 7,493,133 B2
• Time in Patent Office: Days
• US Class Current: 455/522
• CPC Class Codes: H04B 1/719 Interference-related aspects
• CPC Class Codes: H04W 52/08 Closed loop power control
• CPC Class Codes: H04W 52/10 Open loop power control
• CPC Class Codes: H04W 52/24 using SIR [Signal to Interference Ratio] or other wireless path parameters
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Systems and techniques are disclosed relating to wireless communications. The systems and techniques involve wireless communications wherein a module or communications device is configured to enable a closed-loop power control in response to a detecting a wide-band interferer and disable the closed-loop power control in response to not detecting interferer.

Claims

1. A method of power control, comprising:

determining whether a wide-band interference is above or below a threshold;

enabling closed-loop power control in response to determining a wide-band interference above a threshold;

disabling closed-loop power control in response to determining the wide-band interference is below threshold; and

sending a power feedback signal indicating a power transmission level if the closed-loop power control is enabled.

2. The method of claim 1 further comprising:

disabling open-loop power control in response to determining a wide-band interference above threshold; and

enabling open-loop power control in response to determining the wide-band interference is below threshold.

3. The method of claim 1, wherein the power feedback signal is a power-up command indicating an increase in power transmission level.

4. The method of claim 1, wherein the power feedback signal is a power-down command indicating a decrease in power transmission level.

5. The method of claim 3, wherein the power feedback signal is a power-up command if a quality parameter is less than a target quality parameter.

6. The method of claim 4, wherein the power feedback signal is a power-down command if a quality parameter is greater than a target quality parameter.

7. The method of claim 1, further comprising sending a feedback signal indicating wide-band interference.

8. A wireless terminal, comprising:

means for enabling closed-loop power control in response to determining a wide-band interference above a threshold;

means for disabling closed-loop power control in response to determining the wide-band interference is below threshold; and

means for sending a power feedback signal indicating a power transmission level if the closed-loop power control is established.

9. The wireless terminal of claim 8 further comprising:

means for disabling open-loop power control in response to determining a wide-band interference above threshold; and

means for enabling open-loop power control in response to determining the wide-band interference is below threshold.

10. The wireless terminal of claim 8, wherein the power feedback signal is a power-up command if a quality parameter is less than a target quality parameter.

11. The wireless terminal of claim 8, wherein the power feedback signal is a power-down command if a quality parameter is greater than a target quality parameter.

12. A wireless terminal, comprising:

a receiver configured to determine a wide-band interference above a threshold;

a baseband processor configured to enable closed-loop power control in response to detecting the wide-band interference, the baseband processor coupled to the receiver;

a transmitter configured to send a power feedback signal indicating a power transmission level if the closed-loop power control is enabled, the transmitter coupled to the baseband processor.

13. The wireless terminal of claim 12 wherein:

the baseband processor is configured to disable open-loop power control in response to detecting wide-band interference above a threshold; and

the baseband processor is configured to enable open-loop power control in response to determining the wide-band interference is below threshold.

14. The wireless terminal of claim 12, wherein the power feedback signal is a power-up command if a quality parameter is less than a target quality parameter.

15. The wireless terminal of claim 12, wherein the power feedback signal is a power-down command if a quality parameter is greater than a target quality parameter.

16. Computer readable media embodying a program of instructions executable by a computer program, said computer readable media comprising:

a computer readable program code means for enabling closed-loop power control in response to determining a wide-band interference above threshold;

a computer readable program code means for disabling closed-loop power control in response to determining the wide-band interference is below threshold; and

a computer readable program code means for sending a power feedback signal indicating a power transmission level if the closed-loop power control is established.

17. The computer readable media of claim 16 further comprising:

a computer readable program code means for disabling open-loop power control in response to determining a wide-band interference above threshold; and

a computer readable program code means for enabling open-loop power control in response to determining the wide-band interference is below threshold.

18. The computer readable media of claim 16, wherein the power feedback signal is a power-up command if a quality parameter is less than a target quality parameter.

19. The computer readable media of claim 16, wherein the power feedback signal is a power-down command if a quality parameter is greater than a target quality parameter.