Project supported by the National Natural Science Foundation of China (Nos. 60496315, 60702039, and 60802009);the National High-Tech Research and Development Program (863) of China (Nos. 2006AA0Z277 and 2008AA01Z211);the International Science and Technology Cooperation Programme of China (No. 2008DFA11630);the Natural Science Foundation of Hubei Province, China (No. 2008CDB325)
We investigate the bandwidth allocation and power control schemes in orthogonal frequency division multiplexing (OFDM) based multi-hop cognitive radio networks,and the color-sensitive graph coloring (CSGC) model is vi...