Through the previous decade, an ever increasing demand of wireless radio spectrum has
been observed due to expeditious use of various wireless applications and devices …

With the advent of 5G (and beyond) technologies, efficient exploitation of radio spectrum
resources is becoming the fundamental block of the new digital economy. Unfortunately …

Radio spectrum has become a scarce and precious resource in wireless communications
due to explosive growth of demand from newly developed wireless devices, applications …

Dynamic spectrum access and cognitive radio have been recognized as the technologies to
efficiently answer the radio spectrum scarcity problem. Such solutions allow non-licensed …

The radio spectrum is witnessing a major paradigm shift from fixed spectrum assignment
policy to the dynamic spectrum access, which will completely change the way radio …

The current fixed spectrum allocation approach is inefficient in resource utilization and
hinders the freedom to dynamically exchange spectrum ownership and deploy new wireless …

Cognitive Radio (CR) has emerged as a promising technology to address the spectrum
scarcity through encouraging the open access of licensed spectrum to unlicensed users …

This paper studies the auction-driven dynamic spectrum access in cognitive radio networks
with heterogeneous secondary users, who have different risk attitudes. First, a game …

Under-utilization of wireless spectrum by the licensed owners creates spectrum holes which
can be opportunistically exploited by secondary users (SUs). By incorporating dynamic …

Cognitive radio is an emerging technology that has a high potential to deal with the scarcity
problem in the radio spectrum. Dynamic spectrum access in cognitive networks enhances …