PREDICTIVE MODELING SYSTEM FOR SPECTRUM USE

• US 20060172705A1
• Filed: 02/01/2005
• Published: 08/03/2006
• Est. Priority Date: 02/01/2005
• Status: Abandoned Application

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Parthasarathy, Sanjay, Mathur, Anoop K.
• Application Number:
  US10/906,066
• Publication Number:
  US 20060172705A1
• Time in Patent Office: Days
• US Class Current: 455/67.110
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 16/22 Traffic simulation tools or models

Abstract

A system for predicting portions of the spectrum to be available for communications. Data of spectrum usage over time and availability may be obtained. An analysis of the data may be made and then a prediction may be inferred as to the present and future availability of various portions of the spectrum for use. The system may increase the usability of the spectrum.

Claims

1. A modeling system for finding at least one hole in a spectrum for a transmitter, comprising:

a spectrum information mechanism having a first input for receiving information related to past and present spectrum usage, and having an output for summarizing relevant spectrum usage;

a spectrum analyzer having an input connected to the output of the spectrum information mechanism, and having an output for providing analyses of the spectrum;

a hole estimator having an input connected to the output of the spectrum analyzer and having an output for providing hole estimates and a history of holes; and

a model predictive controller having a first input connected to the output of the hole estimator, a second input connected to an output of the transmitter, and having an output for providing predictions about holes including their frequencies, times and periods of availability.

2. The system of claim 1, wherein the output of the model predictive controller is connected to an input of the transmitter.

3. The system of claim 2, further comprising:

a spectrum predictor having an output connected to a third input of the model predictive controller; and

a disturbance model having an output connected to an input of the spectrum predictor.

4. The system of claim 3, further comprising a stochastic processor having an output connected to a fourth input of the model predictive controller.

5. The system of claim 4, wherein the stochastic processor is a Markov processor for hole dynamics.

6. The system of claim 5, wherein the spectrum predictor along with a signal from the disturbance model may provide information about surge events to the third input of the model predictive controller.

26. The means of claim 25, further comprising a repeat of the means of claim 2 for another adjusted system model.

7. A method for planning effective spectral use by a transmitter, comprising:

gathering information about the use of the spectrum;

providing the information to a stochastic process;

developing a model predicting frequencies and times and probabilities of successful transmission by the transmitter;

transmitting with the transmitter on predicted frequencies and times from the model;

noting the successes and failures of transmission by the transmitter on the selected frequencies and times;

comparing the successes and failures of transmission with the predicted probabilities of successful transmission by the transmitter; and

using results of the comparing the successes and failures for refinement of the model.

8. The method of claim 7, further comprising predicting from the model, as refined, frequencies and times and probabilities of successful transmission by the transmitter.

9. The method of claim 8, further comprising:

transmitting with the transmitter on predicted frequencies and times from the model, as refined;

noting the successes and failures of transmission by the transmitter on the selected frequencies and times;

comparing the successes and failures of transmission with the predicted probabilities of successful transmission by the transmitter; and

using results of the comparing the successes and failures for refinement of the model.

10. The method of claim 9, further comprising repeating the method of claims 8 and 9 as desired.

11. A spectrum use system comprising:

a communication system connected to a transmitter/receiver device;

a system model connected to the communication system;

a controller connected to the system model and communication system;

a spectrum information mechanism connected to the communication system and the system model; and

a differencing device connected to the system model and the communication model.

12. The spectrum use system of claim 11, further comprising:

a spectrum information mechanism connected to the system model and the communication system; and

a transmitter connected to the communication system.

13. The spectrum use system of claim 12, wherein:

an output of the communication system may be an indication of success of transmission for certain frequencies and times;

an output of the system model may be an indication of a prediction of success of transmission for certain frequencies and times;

an output of the differencing device may be the difference between the indication of success of transmission for certain frequencies and times and the prediction of success of transmission for certain frequencies and times; and

the difference from the differencing device may be input to the system model.

14. The spectrum use system of claim 13, wherein:

the output from the system mode to the controller may be an adjustment within the controller of the input from the communication system; and

the difference from the differencing device to the system model may be an adjustment of the indication of the prediction of success of transmission.

15. A means for predicting available holes and times in a spectrum comprising:

means for providing information about spectrum usage;

means for spectrally analyzing the information about the spectral usage;

means for estimating holes from results of the spectral analyzing; and

means for forming a model of the spectrum revealing available holes and times based at least partially on information from the means for estimating holes.

16. The means of claim 15, wherein the means for forming a model may utilize a stochastic process.

17. The means of claim 16, further comprising:

a means for predicting spectrum events; and

wherein the means for forming a model of the spectrum revealing available holes and times may be based at least partially on information from the means for predicting spectrum events.

18. The means of claim 17, wherein the model of the spectrum reveals available hop sequences and times.

19. The means of claim 18, wherein the stochastic process is a Markov process.

20. A modeling system comprising:

a system model having a first input for frequency usage over time and an output for a prediction of success of transmission;

a communication system having a first input for frequency usage over time and a first output for indicating an actual success of transmission;

a controller having a first input connected to the first output of the communication system, a second input connected to the output of the system model, and an output connected to a second input of the communication system and a second input of the system model; and

an adder-subtracter having a first input connected to the first output of the communication system, a second input connected to the output of the system model, and an output connected to a third input of the system model for providing a difference between the actual success of transmission and the predicted of success of transmission.

21. The modeling system of claim 20, further comprising:

a transmitter having an output connected to a third input of the communication system and having an input connected to a third output of the communication system; and

a spectrum/frequency information mechanism having an output connected to the first input of the system model and to the first input of the communication system, and having an input connected to a second output of the communication system.

22. A method for spectrum modeling for use of a transmitter, comprising:

obtaining information about uses, including use of the transmitter, of the spectrum in terms of frequencies, times and durations;

performing spectral analyses of the information;

estimating holes in the spectrum from the spectral analyses;

predicting the spectrum condition relative to unexpected transmission events;

importing a stochastic process for dealing with hole dynamics; and

feeding into a model predictive controller information including that of estimating holes in the spectrum, predicting the spectrum condition relative to unexpected transmission events, and/or with at least one stochastic process to process the information into a model of the spectrum revealing holes and their periods most likely to be available.

23. The method of claim 22, further selecting the frequency or frequencies or hop sequence of frequencies and times and durations determined at least partially according to the model of the spectrum for transmission by the transmitter.

24. A means for spectral modeling for transmitter use comprising:

means for constructing a system model;

means for providing spectrum use information to the system model;

means for attaining a prediction of success of transmission at certain frequencies and times from the system model;

means for using the transmitter at the certain frequencies and times;

means for attaining information about actual success of transmission by the transmitter at the certain frequencies and times;

means for determining a difference between the actual success of transmission by the transmitter at the certain frequencies and times and prediction of success of transmission at certain frequencies and times from the system model; and

means for providing an adjusted system model with the difference.

25. The means of claim 24, further comprising:

means for providing spectrum use information to the adjusted system model;

means for attaining a prediction of success of transmission at certain frequencies and times from the adjusted system model;

means for using the transmitter at the certain frequencies and times;

means for attaining information about actual success of transmission by the transmitter at the certain frequencies and times;

means for determining a difference between the actual success of transmission by the transmitter at the certain frequencies and times and prediction of success of transmission at certain frequencies and times from the adjusted system model; and

means for providing another adjusted system model with the difference.