Dynamic system level frequency spectrum allocation scheme based on cognitive radio technology

Cognitive radio is being widely discussed, and resource allocation scheme is drawing a lot of attention. Although the existed resource allocation strategies have successfully enhanced spectrum efficiency, some critical challenges still remain unanswered such as the jointly consideration of the efficiency and fairness, the rational description of the spectrum resources, and the execution mode of the spectrum allocation. This paper presents a system level dynamic frequency spectrum allocation scheme based on a central heterogeneous network architecture, evaluates the matching degree of the spectrum demand and the available spectrum resources with corresponding matrices, jointly considers the efficiency and fairness of different cognitive radio systems. Simulation results and the application scenario are also presented and analyzed.