Cognitive radio has emerged as a new design paradigm for the next-generation wireless
networks. Cognitive radio networks are designed based on the concept of dynamic spectrum …

Today's wireless networks are characterized by fixed spectrum assignment policy. The
limited available spectrum and the inefficiency in the spectrum usage necessitate a new …

In cognitive radio networks, the media access control (MAC) protocols need to determine the
availability of spectrum resource through spectrum sensing and coordinate with the other …

Wireless networks are very significant in the present world owing to their widespread use
and its application in domains like disaster management, smart cities, IoT etc. A wireless …

With the rapid advancements in wireless communication, the problem of scarce radio
resources and the low spectral efficiency caused by the stationary spectrum sharing …

With the rapid deployment of new wireless devices and applications, the last decade has
witnessed a growing demand for wireless radio spectrum. However, the fixed spectrum …

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 …

With the development of wireless communication technology, the requirement for data rate is
growing rapidly. Mobile communication system faces the problem of shortage of spectrum …

This Chapter introduces the cognitive radio network as one of the most promising
technologies for the immediate and very near future. It explores its rich history and …

The inherent scarcity of frequency spectrum, along with the fixed spectrum allocation
adopted policy, has led to a dire shortage of this indispensable resource. Furthermore, with …