… radio spectrum of the primary networks. To fully utilize the primary spectrum and maximize
the spectral efficiency, overlay … , a hybrid transmission system that exploits both overlay and …

… There have been many studies of cognitive radio networks … radio system based on queueing
process was also applied to the packet-based vertical handover between different radio …

… A hybrid overlay/underlay cognitive radio network (CRN) is … problem in accessing the hybrid
overlay/underlay CRN is … queuing server is used to model hybrid overlay/underlay CRN. The …

… a joint overlay-and-underlay spectrum sharing CR network has … problem in hybrid
overlay/underlay CR networks, where … 1) A hybrid overlay/underlay spectrum sharing scheme is …

… technology and the improved spectrum reuse by joint utilization of overlay … radio network
(CRN) scenario with a mobile energy-harvesting secondary transmitter (ST). The hybrid overlay-…

… To enable the Secondary Users to coexist with the Primary Users, Overlay and … a hybrid
overlay/underlay spectrum access strategy that has the features of both the traditional overlay …

… In an overlay cognitive system, the unoccupied spectrum holes should be shared by … a
cognitive radio communication system that can operate either in underlay or overlay mode …

… and overlay modes, then we develop the hybrid underlay/overlay transmission mode. In
Section IV, we analyze the optimal transmission strategies for both underlay and overlay modes …

… In cognitive radio networks (CRNs), hybrid overlay and underlay sharing … of radio spectrum.
Unlike existing works in literatures where only one secondary user (SU) uses both overlay …

… hybrid overlay/underlay sharing. In this paper, to enhance the spectrum efficiency, the hybrid
spectrum overlay … A hybrid overlay/underlay resource allocation algorithm for cellular CRNs …