Spectrum Sharing Techniques in Cognitive Radio Networks – A Survey

Cognitive radio network (CRN) is considered a plausible way out for future 5G applications through its dynamic spectrum access technology. Spectrum sharing being the main objective of CRN, it alleviates the spectrum scarcity problem. In this paper, the manifold techniques for spectrum sharing in CRN are outlined. The distinct advantages and major limiting constraints with relevant to the hybrid spectrum access technology are elaborated thoroughly to enhance the QoS parameters of the users and to achieve better spectral efficiency.