A Novel Spectrum Sharing Algorithm Based on the Throughput in Cognitive Radio Networks

Spectrum sharing is of special significance among all the key technologies in cognitive radio (CR), such as spectrum sensing, spectrum management and power allocation etc. Since all the efforts in CR directly aim at enhancing spectrum utilization and spectrum sharing is the final step of all these key technologies spectrum sharing completely determines whether CR is jus; a theoretical topic or a practically feasible technology. In this paper, a novel spectrum sharing strategy based on the throughput model in a cognitive radio network (CRN) is proposed, in which maximum theoretical throughput is taken into account on the research of spectrum sharing in CR. And then an optimization problem in the form of binary integer linear programming (BILP) to describe this model is formulated and a directional search (DS) algorithm to solve this BILP problem is designed. Finally, numerical results show that this strategy is quite feasible.