Patent ID: 8213954

Claim:
A method of utilizing a geo-location database to avoid interference from a cognitive radio (CR) unit to at least one primary incumbent system, comprising: estimating, at the CR unit, an Operational Location Uncertainty region for the CR unit, wherein the Operational Location Uncertainty Region comprises a plurality of location points, wherein estimating further comprises: estimating an operating location for the CR unit; estimating an operating location estimate accuracy for the estimated operating location; providing an allowed location determination error for the CR unit by a regulatory authority; and wherein an Allowed Location Error Region is determined as being centered on the operating location of the CR unit, and extends outward to a distance equal to the difference between the allowed location determination error and the operating location estimate accuracy; deriving, from the geo-location database, a plurality of location-based system operating parameters that are capable of avoiding interference to the at least one primary incumbent system, wherein the geo-location database represents each of the plurality of location points in the Operational Location Uncertainty Region by a corresponding location-based system operating parameter; examining the corresponding location-based system operating parameter at each of the plurality of location points in the Operational Location Uncertainty Region to determine a location-based system operating parameter from among the plurality of location points; and operating the CR unit with the determined location-based system operating parameter that avoids interference to the at least one primary incumbent system, and further comprising: determining an updated location-based system operating parameter by selecting a maximum location-based system operating parameter from among a plurality of location points over the Allowed Location Error Region, wherein a location point corresponding to a center of the Allowed Location Error Region is a location point corresponding to a minimum location-based system operating parameter selected from among the plurality of location points in the Operational Location Uncertainty Region; and operating the CR unit using the updated location-based system operating parameter.