Patent ID: 8737922

Claim:
A method for controlling interference generated by a white space device, the method comprising: transmitting a request for information regarding channels available for secondary usage, from a network node of a wireless network, to a remote entity; receiving, by the network node, from the remote entity, information indicating a channel available for secondary usage, a critical position associated with said channel, and an interference threshold for the critical position; deriving, by the network node, a constraint related to allocating said channel to at least one white space device, based on a position of the at least one white space device, the critical position, and the interference threshold; and allocating, by the network node, said channel and a transmit power to the at least one white space device based on the derived constraint, such that an interference generated in the critical position by the at least one white space device does not exceed the interference threshold, wherein the critical position corresponds to locations near a primary protection zone where communications of the at least one white space device using the channel to which the critical position is associated, interfere with communications in the primary protection zone.