Time-critical and delay-sensitive multimedia applications require more spectrum and
transmission resources. With the provision of cognitive radios (CRs), the underutilized …

The majority of work in cognitive radio networks have focused on single-hop networks with
mainly challenges at the physical and MAC layers. Recently, multi-hop secondary networks …

In this letter, a cooperative non-orthogonal multiple access system with imperfect successive
interference cancellation is investigated in an underlay cognitive radio network. Considering …

Abstract Machine-to-machine (M2M) communications emerge to autonomously operate to
link interactions between Internet cyber world and physical systems. We present the …

The fixed spectrum allocation causes inefficient utilization of licensed spectrum bands, due
to which Cognitive Radio Networks (CRNs) emerged as a promising solution. Cognitive …

Abstract Cognitive Radio Networks (CRNs) have been receiving significant research
attention recently due to their ability to solve issues associated with spectrum congestion …

Abstract The uncertain availability of the spectral resource imposes unique challenges in
cognitive radio networks. One of the critical issues is to counteract the performance …

To fully empower sensor networks with cognitive Internet of Things (IoT) technology, efficient
medium access control protocols that enable the coexistence of cognitive sensor networks …

Cooperative relaying combined with selection exploits spatial diversity to improve the
performance of interference-constrained secondary users in an underlay cognitive radio …

In this work we investigate the problem of video streaming in cognitive radio networks from a
cognitive radio video source to a set of cognitive radio destinations using multicasting. Our …