Patent ID: 8004995

Claim:
A cooperative diversity method, the method comprising: determining a first terminal and a second terminal to be a first cooperative diversity pair according to a spectrum sensing result of a cognitive radio (CR) for each of the first terminal and the second terminal, the spectrum sensing result of the CR for the first terminal being different from the spectrum sensing result of the CR for the second terminal due to a power difference of signals from cells that are respectively adjacent to the first and second terminals, the determining of the first terminal and the second terminal comprising selecting, as the second terminal, a terminal having a most similar spectrum data to spectrum data of the spectrum sensing result of the CR for the first terminal from among a plurality of terminals; selecting a subchannel of the first cooperative diversity pair through which data is exchanged between the first terminal and the second terminal; and transmitting the data between the first terminal and the second terminal through the selected subchannel of the first cooperative diversity pair.