Hierarchical Spectrum Sharing Networks

A spectrum heterogeneity analysis in the cognitive radio network is conducted in this paper. Subsequently, a spectrum-heterogeneity-based hierarchical spectrum sharing (HSS) network for cognitive radio is proposed. The corresponding method of classifying available spectrums and communication based on the proposed architecture is also presented. Based on the above network architecture, we propose a reference protocol architecture. Research on these protocol function blocks, such as spectrum sensing, spectrum manager, and so on, is conducted. Numerical results show that HSS can provide a considerable extension to available spectrums so that the spectral utility may be further improved.