Granted Patent B2

US 8,208,848 · App. 12/411,352 · Granted Jun 26, 2012

Abstract

Claims (37)

1. A method, comprising:

measuring power within at least one part of a wireless frequency band;

calculating a variance, a mean, and a mean-to-variance ratio based upon the measured power, wherein the calculation is performed through at least one processor;

comparing the mean, variance, and mean-to-variance ratio to known thresholds;

determining if jamming is present within the at least one part of the wireless frequency band.

2. The method of claim 1 , further comprising creating an alert upon the determination that jamming is present.

3. The method of claim 2 , further comprising upon determining that jamming is present, marking at least one part of the wireless band or channel as being jammed.

4. The method of claim 1 , wherein the method is performed in a wireless gateway.

5. The method of claim 1 , wherein the method is performed at a predetermined interval.

6. The method of claim 3 , wherein the marking of the at least one part of the wireless band as being jammed is used to decrease the time needed to create a wireless connection.

7. A system, comprising:

a receiver, wherein the receiver is configured to receive wireless signals in a wireless band; and

a processor, wherein the processor is configured to determine if jamming is present within the wireless signals in the wireless band by comparing the mean, variance, and mean-variance ratio of the received signals to known thresholds.

8. The system of claim 7 , wherein the system is performed in a mobile device.

9. The system of claim 8 , wherein the system is performed in a base station.

10. The system of claim 8 , wherein the system is further capable of determining which channels within the band are being jammed.

11. The system of claim 7 , wherein the wireless band is a GSM band.

12. The system of claim 10 , further comprising a transmitter, wherein the transmitter indicates to at least one other device that certain channels have been jammed.

13. The system of claim 12 , wherein the channels that have been jammed are avoided as being unusable by at least one wireless device.

14. The system of claim 7 , wherein the processor provides a notification that jamming is present.

15. A method, comprising:

performing a full scan of a wireless band;

measuring the power in the wireless band;

comparing the measured power in the wireless band with at least one threshold;

determining if an interference device is present in at least one part of the wireless band; and

upon determining that an interference device is present in the at least one part of the wireless band, marking the at least one part of the wireless band as being jammed.

16. The method of claim 15 , wherein the method is performed in a wireless gateway.

17. The method of claim 15 , wherein the method is performed at a predetermined interval.

18. The method of claim 15 , wherein the marking of the at least one part of the wireless band as being jammed is used to decrease the time needed to create a wireless connection.

19. The method of claim 15 , wherein mean and variance of the measured power are used to determine if jamming is present.

20. A method, comprising:

performing at least part of a full scan of at least one part of a wireless band;

calculating a variance, a mean, and a mean-to-variance ratio based upon the at least part of the full scan of the at least one part of the wireless band of the power observed, wherein the determination is performed through at least one processor;

comparing the calculated mean, variance, and mean-to-variance ratio to known thresholds;

determining if an interference device is present in at least one part of the wireless band; and

creating a notification upon the determination that the interference device is present.

21. The method of claim 20 , wherein the notification is a visual notification.

Assignments (6)