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 …

Fast evolution of the Internet, mobile technologies and energy efficient communication
protocols has given a new momentum to e-businesses and world become a global village …

In cognitive radio networks (CRNs), two users have to rendezvous on a common available
channel before communications. Most existing rendezvous papers focus on the channel …

In cognitive radio networks, methods to allow the efficient sharing of the radio spectrum
without causing any harmful interference to the primary users and to solve the spectrum …

A secondary user (SU) in multichannel cognitive radio ad hoc network (CRAHN) has a
limited transmission range, which may raise a hidden multichannel sensing problem. In …

Opportunistic usage selection of a licensed channel by a secondary user (SU) and its
contention for data transmission is a challenging problem in coexisting cognitive radio …

Cognitive radio (CR) technology enables opportunistic exploration of unused licensed
channels. By giving secondary users (SUs) the capability to utilize the licensed channels …

One of the main challenges in Cognitive Radio Networks (CRNs) is that the link
configuration between two nodes is affected by the transmission power, interference with …

One of the major challenges of Cognitive Radio (CRNs) is the spectrum handoff issue.
Spectrum handoff happens when a Primary Users (PUs) appears in a spectrum band that is …

One of the main challenges in Cognitive Radio Networks (CRNs) is that the dynamic radio
environment affects the Quality of Service (QoS) requirements of Secondary Users (SUs) …