Method and system for classifying communication signals in a dynamic spectrum access system
AssigneeShared Spectrum Company
InventorsMark Allen McHenry, Igor Bazarov, Dmitry Dain, Jevgenijs Livsics, Olga K. Ritterbush, Karl N. Steadman
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Abstract
Methods and systems for dynamic spectrum access (DSA) in a wireless network are provided. A DSA-enabled device may sense spectrum use in a region and, based on the detected spectrum use, select one or more communication channels for use. The devices also may detect one or more other DSA-enabled devices with which they can form DSA networks. A DSA network may monitor spectrum use by cooperative and non-cooperative devices, to dynamically select one or more channels to use for communication while avoiding or reducing interference with other devices.
Claims30
A method of classifying the status of a channel by a dynamic spectrum access-enabled device, said method comprising:
- determining a channelization for a region of spectrum;
- measuring energy present in a plurality of channels defined by the channelization;
- generating a first confidence score indicating the difference between a predefined signal mask and energy levels measured in a first group of the plurality of channels;
- generating a second confidence score indicating the difference between the predefined signal mask and energy levels measured in a second group of the plurality of channels, the second group of channels including at least one channel comprising a higher frequency than each channel in the first group of channels;
- and
- in response to at least one of the first and second confidence scores exceeding a predefined threshold, classifying the corresponding group of channels as containing a cooperative signal.
A method of operating a dynamic spectrum access-enabled device, said method comprising:
- determining a channelization for a region of spectrum;
- measuring energy present in at least one channel defined by the channelization;
- based on the measured energy, identifying a signal in the at least one channel;
- comparing the detected signal to a predefined signal mask, the signal mask defining a power-frequency relationship for a modeled signal in the at least one channel;
- calculating a confidence score based on the comparison of the detected signal to the signal mask, the confidence score indicating the likelihood that the signal is a cooperative signal;
- and
- based on the confidence score, classifying the signal identified in the at least one channel as at least one of a non-cooperative signal, a primary signal, and a cooperative signal.
A dynamic spectrum access-enabled device comprising:
- a detector configured to measure energy present in at least one channel;
- a first circuit to:
- identify a signal in the at least one channel based on the energy measured by said detector;
- compare the detected signal to a predefined signal mask, the signal mask defining a power-frequency relationship for a modeled signal in the at least one channel;
- calculate a confidence score based on the comparison of the detected signal to the signal mask, the confidence score indicating the likelihood that the signal is a cooperative signal;
- and
- based on the calculated confidence score, classify the signal identified in the at least one channels as available for use by the device node.
A method of identifying a cooperative signal by a dynamic spectrum access-enabled device, said method comprising:
- measuring energy present in at least one of a first side portion and a second side portion of a narrow channel, the first side portion being defined by a first frequency range and the second side portion being defined a second frequency range, the second frequency range being higher than and non-overlapping with the first frequency range;
- setting an energy threshold to be the value of the energy measured in said side portion measuring step;
- measuring energy present in a central portion of the narrow channel, the central portion being defined by a central frequency range between the first and second frequency ranges;
- if the energy measured in the central portion is at least as great as the threshold, classifying a signal detected in the narrow channel as a cooperative signal.
Dependencies are inferred from the claim text.