Abstract
Due to massive demand of spectrum for new wireless services and applications, there is a shortage of available wireless spectrum which has motivated researchers for better spectrum management policies. The concept of the cognitive radio network (CRN) provides an innovative solution for spectrum management through exploiting the available spectrum without interrupting the licensed user activities. However, CRN imposes some challenges caused by the unpredictable nature of the spectrum availability, and different QoS requirements for different applications. Spectrum management functions can handle these issues for the realization of CRN. In this chapter, the author first provides a general idea of cognitive radio and the network architecture and then revisited spectrum management functionalities: spectrum sensing, spectrum allocation and sharing, and spectrum handoff. The potential applications of CR networks are also provided in this chapter. It is believed that this chapter will help the beginners in facilitating the introductory idea in the area of the cognitive radio network.
Keywords
Cognitive Radio Primary User Secondary User Cognitive Radio Network Spectrum SharingReferences
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