Radio spectrum sensing (SS) has been an active topic of research over the past years due
to its importance to cognitive radio (CR) systems. However, in CR networks (CRNs) with …

This paper presents a novel medium access control medium access control (MAC) for
distributed single-channel cognitive radio networks (CRNs) denominated cognitive radio …

This paper studies the service time required to transmit a packet in an opportunistic
spectrum access scenario, where an unlicensed secondary user (SU) transmits a packet …

In recent years, there has been a rapid evolution of wireless technologies that has led to the
challenge of high demand for spectral resources. To overcome this challenge, good …

Sensing is one of the most challenging issues in cognitive radio networks. Selection of
sensing parameters raises several tradeoffs between spectral efficiency, energy efficiency …

Decentralized wireless networks are gaining increasing popularity as they do not need a
fixed infrastructure. Simultaneously, multiple research initiatives have led to different findings …

In this work it is considered a ultra wideband cognitive radio network where multiple
secondary users (SUs) communicate with an access point (AP) in an opportunistic way. The …

This paper proposes a new analytical model for the performance of ap persistent slotted
Aloha medium access protocol in a Cognitive Radio Network (CRN) composed by a single …

The decentralized Cognitive Radio Medium Access Control (CR MAC) protocols proposed
so far are usually evaluated considering homogeneous sensing conditions where all …

Radio Spectrum sensing has been a topic of strong research in the last years due to its
importance to Cognitive Radio (CR) systems. However, in Cognitive Radio Networks …