Cognitive spectrum analysis and information display techniques

• US 20060178124A1
• Filed: 09/02/2005
• Published: 08/10/2006
• Est. Priority Date: 02/08/2005
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Sugar, Gary L.
• Granted Patent: US 7,466,960 B2
• Time in Patent Office: Days
• US Class Current: 455/226.100
• CPC Class Codes: H04B 17/327 Received signal code power [RSCP]

Abstract

A device and method are provided for monitoring and analyzing received over-the-air energy. According to one aspect, a device and method are provided for performing spectrum analysis on the received energy, generating data for displaying one or more plots associated with the analyzed received energy; determining a type of one or more signals occurring from the received energy; and generating data for displaying on the same display screen as said one or more plots, a name for the one or more signals determined to be occurring. Thus, unlike traditional spectrum analyzer devices that show plots or waveforms, the method and device described herein shows plots or waveforms and on the same screen a list of the devices causing those plots or waveforms. In addition, a filter may be applied to the plots or traces whereby plots are displayed for a particular user-specified device determined to be occurring, or a user-specified type or class of devices determined to be occurring. According to another aspect, the monitoring method and device involves performing spectrum analysis on the received energy, displaying one or more plots associated with the receive energy, and in response to determining a graphical user interface element is positioned over or near a display plot, generating data to display the name for the signal or signals causing that plot or waveform.

Claims

1. A method for monitoring energy received over-the-air, comprising:

a. performing spectrum analysis on the received energy;

b. generating data for displaying one or more plots associated with the analyzed received energy;

c. determining a type of one or more signals present in the received energy; and

d. generating data for displaying on the same display screen as said plots a name for each of the one or more signals.

2. The method of claim 1, and further comprising displaying one or more plots associated with the analyzed received energy and displaying on the same display screen as said one or more plots a name for the one or more signals determined to be occurring.

3. The method of claim 2, and further comprising responding to a user command to display one or more plots associated only with a particular signal.

4. The method of claim 3, and further comprising responding to a user command to select the particular signal for which the one or more plots only are to be displayed.

5. The method of claim 2, and further comprising responding to a user command to display one or more plots associated only with a particular class or type of signals.

6. The method of claim 5, and further comprising responding to a user command to select the particular group of signals for which the one or more plots only are displayed.

7. The method of claim 1, wherein (c) determining comprises analyzing one or more characteristics derived from said spectrum analysis to classify one or more signals contained in the received energy.

8. The method of claim 1, wherein (d) generating comprises generating data for presenting a list of names for the one or more signals.

9. The method of claim 8, wherein (d) generating comprises generating data to display the names in a tree view format, wherein signals of similar types or similar network types are grouped together.

10. The method of claim 8, wherein (d) generating comprises generating data to display the device names sorted by device name.

11. The method of claim 8, wherein (d) generating comprises generating data to highlight certain device names so that they stand out from other device names.

12. The method of claim 8, wherein (d) generating comprises generating data for displaying signal names in a list format.

13. The method of claim 12, wherein (d) generating comprises generating data for signal names in the list format, the data include one or more of:

start time, time duration that signal is on, identifier of channel where occurring, duty cycle and signal strength.

14. The method of claim 1, wherein (c) determining comprises determining that the received energy contains one or more unrecognized signals when one of a plurality of known signal types cannot be matched to data derived from the received energy.

15. The method of claim 14, wherein (d) generating comprises generating data indicating that an unrecognized signal type is detected.

16. The method of claim 15, wherein (d) generating comprises generating text data describing at least one characteristics for an unrecognized signal type.

17. The method of claim 1, wherein (b) generating comprises generating data for one or more of:

power versus frequency plot, power versus time plot, duty cycle versus frequency plot and spectrogram plot and real-time Fast Fourier Transform (FFT) plot.

18. The method of claim 1, wherein (b) generating comprises generating data for displaying, with respect to one or more channels in the frequency band, data indicating one or more of:

duty cycle, average power, maximum power, number of interferer signals detected, maximum power of detected interferer, interferer duty cycle.

19. The method of claim 1, wherein (d) generating is responsive to a cursor or other graphical user interface element being positioned over a displayed plot to thereby display the name for the signal corresponding to that plot.

20. The method of claim 1, and further comprising, in response to a user command, storing to a file at least one of:

(a) said data for displaying one or more plots associated with the analyzed received energy, and (b) data for displaying a name for each of the one or more signals, for a time interval specified by a user.

21. The method of claim 20, wherein storing comprises storing said file in a format suitable for sharing across computers and networks.

22. The method of claim 20, and further comprising at a later time opening said file with a software application to display the one or more plots associated with the analyzed received energy for said time interval as if it were being monitored live.

23. The method of claim 20, and further comprising displaying a map representing a region in which energy in the frequency band is being received, wherein said storing is responsive to receiving a user command positioning a cursor or other graphical user interface element at a position on the map that corresponds to the approximate position of a device that is receiving and analyzing energy in said region.

24. The method of claim 20, wherein storing comprises storing said data for a user specified position in a region, and wherein said data includes map data for displaying an image of a map of said region and having an indication representing said user specified position where said data is captured in said region.

25. The method of claim 24, wherein storing data comprises storing a list of names for one or more signals determined to be occurring in said region and plots for received radio frequency energy associated with said one or more signals.

26. A method for monitoring energy received over-the-air, comprising:

a. performing spectrum analysis on the received energy;

b. displaying one or more plots associated with the analyzed received energy;

c. in response to determining that a graphical user interface element is positioned over or near a displayed plot, generating data to display the name for the one or more signals causing the plot.

27. The method of claim 26, wherein (c) generating comprises generating data to display the name for the signal corresponding to that plot at a position on a display screen proximate the displayed plot.

28. A method for analyzing energy received in a frequency band, comprising:

a. performing spectrum analysis on the received energy;

b. generating data for displaying one or more plots associated with the analyzed received energy;

c. determining a type of one or more signals occurring in the received energy;

d. generating data for displaying on the same display screen as said plots, a name for each of the one or more signals; and

e. wherein in response to a user command, said (b) generating comprises generating data for displaying one or more plots for only a particular signal or particular type of signals determined to be occurring in the received energy.

29. The method of claim 28, wherein (b) generating comprises filtering out data for signals other than said particular signal or particular type of signals based on said user command.

30. A radio device comprising:

a. a receiver that receives energy detected over-the-air by an antenna;

b. an analog-to-digital converter that converts an output of the receiver to digital data;

c. a processor coupled to the analog-to-digital converter that is programmed to;

i. analyze the digital data to generate data to display one or more spectrum analysis plots associated with the received energy;

ii. determine a type of one or more signals present in the received energy from the digital data; and

iii. generate data for displaying on the same display screen as said plots a name for the one or more signals present in the received energy.

31. The device of claim 30, and further comprising a display that is coupled to the processor to display the one or more plots and a name for the one or more signals present in the received energy.

32. The device of claim 30, wherein the processor is responsive to a graphical user interface element being positioned over or near a displayed plot to generate data for displaying the name for the one or more signals causing the plot.

33. A processor readable medium storing instructions that, when executed by a processor, cause the processor to:

a. analyze digital data derived from received over-the-air energy to generate data to display one or more spectrum analysis plots associated with the received energy;

b. determine a type of one or more signals present in the received energy from the digital data; and

c. generate data for displaying on the same display screen as said plots a name for one or more signals present in the received energy.

34. The medium of claim 33, and further comprising instructions that cause the processor to be responsive to a graphical user interface element being positioned over or near a displayed plot to generate data for displaying the name for the one or more signals causing the plot.

35. A method for monitoring radio frequency energy received over-the-air in a frequency band, comprising:

a. performing spectrum analysis on the received energy;

b. displaying one or more plots associated with the analyzed received energy;

c. determining a type of one or more signals present in the received energy; and

d. displaying on the same display screen as said plots a name for the one or more signals.