Cognitive radio (CR) is the enabling technology for supporting dynamic spectrum access:
the policy that addresses the spectrum scarcity problem that is encountered in many …

Dynamic spectrum policies combined with software defined radio are powerful means to
improve the overall spectral efficiency allowing the development of new wireless services …

In cognitive radio (CR) networks, identifying the available spectrum resource through
spectrum sensing, deciding on the optimal sensing and transmission times, and …

Cognitive radio is regarded as a promising technology to provide high bandwidth to mobile
users via heterogeneous wireless network architectures and dynamic spectrum access …

Design of an efficient medium access control protocol is critical for proper functioning of a
distributed cognitive radio network and better utilization of the channels not being used by …

In this paper, quality-of-service (QoS) provisioning for voice service in cognitive radio
networks is considered. As voice traffic is sensitive to delay, the presence of primary users …

Inefficient use of radio spectrum is becoming a serious problem as more and more wireless
systems are being developed to operate in crowded spectrum bands. Cognitive radio offers …

Since cognitive radio technology can significantly boost spectrum utilization by exploiting
radio spectrum unused by licensed users, it is rapidly gaining popularity and inspiring …

Cognitive MAC protocols are designed to efficiently utilize the scarce spectral resources
without affecting the performance characteristics of primary users. The use of spectrum …

The concept of a multi-interface multi-channel cognitive radio is both novel and promising.
Indeed, such opportunistic access to the spectrum, over multiple channels in a simultaneous …