On spectrum allocation algorithm for heterogeneous channels in cognitive radio networks

Spectrum allocation is one of the most important problems in cognitive radio networks. However, the channel differentiated algorithms have not been emphasized in the current literature. This paper first proposes a classification criterion for heterogeneous channels. Then, an allocation algorithm for the channel classification is provided with the consideration of channel differences and spatial reuse of primary user´s channels. Simulation result shows that the proposed algorithm improves the spectrum utilization and other network performance.