We propose a new framework of joint spectrum allocation and power control to utilize open
spectrum bands in cognitive radio networks (CRNs) by considering both interference …

Cognitive radio (CR) allows unlicensed users to access the licensed spectrum
opportunistically (ie, when the spectrum is left unused by the licensed users) to enhance the …

Spectrum sharing protocols for cognitive radio networks (CRNs) are often designed based
on an exclusive channel occupancy policy. This policy does not allow concurrent cognitive …

Cognitive Radio (CR) is proposed to overcome the problem of spectrum underutilization and
congestion caused by the increasing demand of wireless services and applications. It is still …

Cognitive radio technology solves the spectrum under utilization problem by enabling the
secondary users access the spectrum holes opportunistically. In this paper, we are …

Underlay spectrum sharing in cognitive radio (CR) networks allows that the secondary user
(SU) coexists with the primary user (PU) via primary spectrum sharing to the extent not to …

Spectrum scarcity is the major challenge facing all parties working in the
telecommunications industry. As recently shown, the main problem of spectrum …

One of the most challenging problems in dynamic resource allocation for cognitive radio
networks is to adjust transmission power of secondary users (SUs) while quality of service …

Based on interference temperature model, the spectrum sharing problem between the
secondary user and primary user can be formulated as optimization problem. In this paper …

The opening of under-utilized spectrum creates the opportunity of substantial performance
improvement through cognitive radio techniques. However, the real network performance …