Method and system for dynamically controlling transmit power of a wireless transmitter

• US 10,306,563 B1
• Filed: 01/17/2018
• Issued: 05/28/2019
• Est. Priority Date: 11/30/2017
• Status: Active Grant

• Current Assignee: Wipro Limited
• Original Assignee: Wipro Limited
• Inventors: Rajendran, Surendran, Pattar, Adarsh
• Primary Examiner(s): Rachedine, Mohammed
• Application Number:
  US15/873,682
• Publication Number:
  US 20190166562A1
• Time in Patent Office: 496 Days
• Field of Search: None
• CPC Class Codes: H04B 17/345 Interference values signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR] H04B17/336
• CPC Class Codes: H04W 52/225 Calculation of statistics, e.g. average, variance
• CPC Class Codes: H04W 52/226 using past references to control power, e.g. look-up-table
• CPC Class Codes: H04W 52/243 taking into account interferences
• CPC Class Codes: H04W 52/283 Power depending on the position of the mobile

Abstract

A method and system for dynamically controlling transmit power of a wireless transmitter includes determining a set of sensors based on a location of each of a plurality of sensors, a location of the wireless transmitter, and a maximum range of the wireless transmitter. The method further includes determining a change in power level and a change in interference level at each of the set of sensors based on a plurality of power measurements and a plurality of interference measurements, within a predefined response time, for each of the set of sensors, determining a required change in a transmit power level of the wireless transmitter based on the change in power level and the change in interference level at each of the set of sensors, and dynamically effecting a change in the transmit power of the wireless transmitter based on the required change.

Claims

1. A method of dynamically controlling a transmit power of a wireless transmitter, the method comprising:

determining, by a transmit power control device, a set of sensors based on a location of each of a plurality of sensors, a location of the wireless transmitter, and a maximum range of the wireless transmitter;

determining, by the transmit power control device, a change in power level and a change in interference level at each of the set of sensors based on a plurality of power measurements and a plurality of interference measurements, within a predefined response time, for each of the set of sensors, wherein the determining the change in power level and the change in interference level at each of the set of sensors comprises;

computing an average power measurement and an average interference measurement within the predefined response time;

comparing the average power measurement with a set of power thresholds and the average interference measurement with a set of interference thresholds; and

determining the change in power level and the change in interference level based on the comparison;

determining, by the transmit power control device, a required change in a transmit power level of the wireless transmitter based on the change in power level and the change in interference level at each of the set of sensors; and

dynamically effecting, by the transmit power control device, a change in the transmit power of the wireless transmitter based on the required change.

2. The method of claim 1, wherein the determining the set of sensors comprises:

determining a distance between the wireless transmitter and each of the plurality of sensors; and

selecting the set of sensors based on a minimum distance and a maximum distance within the maximum range of the wireless transmitter.

3. The method of claim 1, wherein the set of power thresholds and the set of interference thresholds are determined based on at least one of maximum likelihood, receiver operating characteristics (ROC), or other change detection techniques.

4. The method of claim 1, wherein the determining the required change in the transmit power level of the wireless transmitter comprises referring to a predefined look-up table.

5. The method of claim 1, wherein the change in the transmit power of the wireless transmitter for the required change in transmit power level is predefined or empirically determined.

6. The method of claim 1, further comprising updating a state table with the change in power level and the change in interference level at each of the set of sensors along with a time stamp and the location of the wireless transmitter.

7. The method of claim 6, further comprising analyzing the state table to identify at least one of a temporal pattern or a spatial pattern.

8. The method of claim 7, further comprising dynamically updating a predefined look-up table for the required change in transmit power level of the wireless transmitter based on the analysis.

9. The method of claim 8, further comprising determining an optimal transmit power of the wireless transmitter based on a current transmit power of the wireless transmitter and a sum total of required changes in transmit power level of the wireless transmitter.

10. A system for dynamically controlling a transmit power of a wireless transmitter, the system comprising:

a transmit power control device comprising at least one processor and a computer-readable medium storing instructions that, when executed by the at least one processor, cause the at least one processor to perform operations comprising;

determining a set of sensors based on a location of each of a plurality of sensors, a location of the wireless transmitter, and a maximum range of the wireless transmitter;

determining a change in power level and a change in interference level at each of the set of sensors based on a plurality of power measurements and a plurality of interference measurements, within a predefined response time, for each of the set of sensors, wherein the determining the change in power level and the change in interference level at each of the set of sensors comprises;

computing an average power measurement and an average interference measurement within the predefined response time;

comparing the average power measurement with a set of power thresholds and the average interference measurement with a set of interference thresholds; and

determining the change in power level and the change in interference level based on the comparison;

determining a required change in a transmit power level of the wireless transmitter based on the change in power level and the change in interference level at each of the set of sensors; and

dynamically effecting a change in the transmit power of the wireless transmitter based on the required change.

11. The system of claim 10, wherein the determining the set of sensors comprises:

determining a distance between the wireless transmitter and each of the plurality of sensors; and

selecting the set of sensors based on a minimum distance and a maximum distance within the maximum range of the wireless transmitter.

12. The system of claim 10, wherein the determining the required change in the transmit power level of the wireless transmitter comprises referring to a predefined look-up table.

13. The system of claim 10, wherein the operations further comprise:

updating a state table with the change in power level and the change in interference level at each of the set of sensors along with a time stamp and the location of the wireless transmitter;

analyzing the state table to identify at least one of a temporal pattern or a spatial pattern; and

dynamically updating a predefined look-up table for the required change in transmit power level of the wireless transmitter based on the analysis.

14. A non-transitory computer-readable medium storing computer-executable instructions for:

determining a set of sensors based on a location of each of a plurality of sensors, a location of the wireless transmitter, and a maximum range of the wireless transmitter;

determining a change in power level and a change in interference level at each of the set of sensors based on a plurality of power measurements and a plurality of interference measurements, within a predefined response time, for each of the set of sensors, wherein the determining the change in power level and the change in interference level at each of the set of sensors comprises;

computing an average power measurement and an average interference measurement within the predefined response time;

comparing the average power measurement with a set of power thresholds and the average interference measurement with a set of interference thresholds; and

determining the change in power level and the change in interference level based on the comparison;

determining a required change in a transmit power level of the wireless transmitter based on the change in power level and the change in interference level at each of the set of sensors; and

dynamically effecting a change in the transmit power of the wireless transmitter based on the required change.

15. The non-transitory computer-readable medium of claim 14, wherein the determining the set of sensors comprises:

determining a distance between the wireless transmitter and each of the plurality of sensors; and

selecting the set of sensors based on a minimum distance and a maximum distance within the maximum range of the wireless transmitter.

16. The non-transitory computer-readable medium of claim 14, wherein the determining the required change in the transmit power level of the wireless transmitter comprises referring to a predefined look-up table.

17. The non-transitory computer-readable medium of claim 14, further storing computer-executable instructions for:

updating a state table with the change in power level and the change in interference level at each of the set of sensors along with a time stamp and the location of the wireless transmitter;

analyzing the state table to identify at least one of a temporal pattern or a spatial pattern; and

dynamically updating a predefined look-up table for the required change in transmit power level of the wireless transmitter based on the analysis.