Fifth Generation (5G) technique aims at achieving high data rate and capacity for large
numbers of users. Cognitive Radio (CR) is a promising technical to boost the development …

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 …

Cognitive Radio (CR) is a new communication network paradigm introduced to solve the
problems of spectrum scarcity and inefficient spectrum usage. Basically, it allows the …

This paper presents a priority-based opportunistic multi-channel medium access control
(MAC) protocols in cooperative cognitive radio (CR) wireless networks, which used to …

Cognitive radio is viewed as a disruptive technology innovation to improve spectrum
efficiency. The deployment of coexisting cognitive radio networks, however, raises a great …

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 allows an opportunistic use of the licensed spectrum by
the CR users, avoiding harmful interference to Primary Users (PUs). To perform their activity …

The scarcity of bandwidth in the radio spectrum has become more vital since the demand for
wireless applications has increased. Most of the spectrum bands have been allocated …

Spectrum scarcity and underutilized frequency bands are the most challenging wireless
networking problems in the last decade. Cognitive radio (CR) is the promising solution for …

This paper proposes a cross-layer based cognitive radio multichannel medium access
control (MAC) protocol with TDMA, which integrate the spectrum sensing at physical (PHY) …