Cognitive radio communication terminal and method for detecting collision using feature detection

When connected to a channel transmission data, and stops transmission of the data on the randomly selected within the period detecting a predetermined collision point, and determines whether the energy or the characteristic information of the other terminal on the channel detection. A result of the determination, sent during when the channel is not detected the energy or the characteristic information of the other terminal is parked to initiate the transmission of the data, and when only the detected energy has the feature information of the detection period the collision select a radio resource and prohibits the radio resource preemption of other terminals and, if the both the energy and feature information is detected, by giving a radio resource stop the transmission of data, and restart the transmission of the data after a predetermined time from the start. CSMA / CA, cognitive radio, cognitive radio, MIMO, sensing, MAC, distributed