Method and system for determining spectrum availability within a network
First Claim
1. A method for determining spectrum availability for a transceiver, the method comprising:
- performing a measurement, wherein the measurement includes a power level;
determining a probability of a presence of a transmitter in a grid cell based on the measurement;
assigning an instantaneous belief indicator, an instantaneous disbelief indicator, and an instantaneous ignorance indicator to the grid cell using a detection threshold, parameters determined by a propagation loss distribution function and the power level, and the probability of the presence of a transmitter;
determining a cumulative belief indicator, a cumulative disbelief indicator, and an ignorance indicator using the instantaneous belief indicator, the instantaneous disbelief indicator, and the instantaneous ignorance indicator; and
indicating spectrum availability in the grid cell based on the cumulative belief indicator, the cumulative disbelief indicator, and an ignorance indicator.
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Abstract
A method and transceiver for determining spectrum availability within a give area is disclosed. The given area includes cells in a grid. A belief evaluator receives a measurement from a signal and assigns an instantaneous belief indicator, an instantaneous disbelief indicator and an instantaneous ignorance indicator based on a detection threshold and the power level of the measurement. The indicators quantify the probability of a presence of a transmitter within the grid cell. A belief accumulator uses the instantaneous indicators along with accumulated belief, disbelief and ignorance indicators from previous measurements to determine cumulative belief, disbelief and ignorance indicators. The accumulated belief, disbelief and ignorance indicators are the results of previous measurements and belief/disbelief/ignorance determinations for the grid cell. An allocator indicates the status of the grid cell and whether a spectrum is available. If a spectrum is available, then the grid cell is added to other available cells within the area to generate the spectrum hole.
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Citations
25 Claims
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1. A method for determining spectrum availability for a transceiver, the method comprising:
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performing a measurement, wherein the measurement includes a power level;
determining a probability of a presence of a transmitter in a grid cell based on the measurement;
assigning an instantaneous belief indicator, an instantaneous disbelief indicator, and an instantaneous ignorance indicator to the grid cell using a detection threshold, parameters determined by a propagation loss distribution function and the power level, and the probability of the presence of a transmitter;
determining a cumulative belief indicator, a cumulative disbelief indicator, and an ignorance indicator using the instantaneous belief indicator, the instantaneous disbelief indicator, and the instantaneous ignorance indicator; and
indicating spectrum availability in the grid cell based on the cumulative belief indicator, the cumulative disbelief indicator, and an ignorance indicator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 24, 25)
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11. A method for determining spectrum availability within a given area, the method comprising:
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performing a measurement of a power level by at least one transceiver;
determining a belief indicator, a disbelief indicator and a ignorance indicator for the at least one grid cell according to the received power level;
using the belief indicator, the disbelief indicator, and the ignorance indicator to determine spectrum availability in the at least one grid cell; and
identifying a spectrum hole by combining the spectrum availability in the at least one grid cell with spectrum availability within at least one other grid cell. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A transceiver comprising:
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a belief evaluator to assign a probability of a presence of a transmitter in a grid cell and to determine an instantaneous belief indicator, an instantaneous disbelief indicator and an instantaneous ignorance indicator for the grid cell within an area based on a measurement of a power level, a detection threshold and the probability;
a belief accumulator to determine a cumulative belief indicator, a cumulative disbelief indicator and an ignorance indicator for the presence of a transmitter within the grid cell using the instantaneous belief indicator, the instantaneous disbelief indicator and the instantaneous ignorance indicator and accumulated belief, disbelief and ignorance indicators in a group behavior algorithm; and
an allocator to indicate spectrum availability within the grid cell according to the cumulative belief indicator, the cumulative disbelief indicator, and ignorance indicator. - View Dependent Claims (18, 19, 20, 21)
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22. A method for determining spectrum availability, the method comprising:
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performing a measurement in a given area; and
using at least one previously stored measurement for the given area to determine spectrum availability for the given area. - View Dependent Claims (23)
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Specification