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Improving Channel Usage in Networks Employing Dynamic Spectrum Access

Studies in Dynamic Spectrum Access often consider aspects of primary communication in their schemes. However, the primary spectrum access modelling is generally over simplistic. This paper considers a realistic modelling of the primary traffic and list a series of parameters that should be considered during spectrum reuse. By modelling primary and secondary communications, a better understanding of secondary spectrum access can be achieved. Furthermore, by studying both primary and secondary communication parameters and their relation, it is possible to tune secondary networks in order to optimize spectrum reuse. The results obtained demonstrate how appropriate parametrization can lead to significant improvements in network performance. Simulation results show that it is possible to attain up to 90% of success during data transfers for secondary when the overall spectrum use of the primary users is at 50%.