A method of operation of a cognitive radio in a hierarchical group of cognitive radios, the hierarchy of cognitive radios including at least one master cognitive radio that has a higher position in the hierarchy than another of the cognitive radios in the group, consistent with the present invention,...http://www.google.de/patents/US20080151856?utm_source=gb-gplus-sharePatent US20080151856 - METHOD AND APPARATUS FOR COGNITIVE RADIO POLICY CHANGE
