Date Added: Oct 2012
Now-a-days cellular and handheld devices hold up most of the data exchange services that is one currently and they widely use high speed data links causing increased usage of available spectrum. However these devices are not always in use so the links stays void sometime and using those void links in spectrum is the brilliance of cognitive radio. When the primary user doesn't avail his licensed band, secondary users use those bands using cognitive radio technology so that the bands are put to efficient usage all the time. Since artificial intelligence is responsible for that the authors are allowing unanticipated, emergent behavior of the sensors in the radio by which an adversary can easily manipulate the radio and could change its behavior.