Cognitive radio (CR) is a promising wireless technology that provides efficient spectral
usage. Medium Access Control (MAC) has an important role in several cognitive radio …

In this paper, a wireless cognitive radio sensor network is considered, where each sensor
node is equipped with cognitive radio and the network is a multi-carrier system operating on …

Cognitive Radio (CR) promises an efficient utilization of radio spectrum resources by
enabling dynamic spectrum access to overcome the spectrum scarcity problem. Cognitive …

Studies showed that the static nature of the traditional spectrum allocation methods,
currently being used to share the radio spectrum, resulted in a plenty of unused spectrum …

In the recently-suggested dynamic spectrum allocation policy of cognitive radio networks [1]–
[3], sensing/monitoring of spectrum availability is identified as a key requirement. To meet …

Recently, machine-to-machine (M2M) communications has become an emerging paradigm
that provides ubiquitous connectivity among numerous devices to support diverse …

Recently, multimedia transmission over cognitive radio networks (CRNs) becomes an
important topic due to the CR's capability of using unoccupied spectrum for data …

New wireless network paradigms will demand higher spectrum use and availability to cope
with emerging data-hungry devices. Traditional static spectrum allocation policies cause …

Cognitive radio (CR) is a key enabler realizing future networks to achieve higher spectral
efficiency by allowing spectrum sharing between different wireless networks. It is important …

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 …