In this paper, we investigate users' performance under the hybrid spectrum access model in
the massive cognitive radio network (CRN), where multiple primary users (PUs) and …

Cognitive radio networks (CRNs) allow secondary users (SUs) to opportunistically transmit
over the channel to enhance the utilization of spectrum authorized to primary users (PUs) …

The need to capture the actual network traffic condition and fundamental queueing
dynamics in a massive cognitive radio network (CRN) is important for proper analysis of the …

Cognitive radio (CR) has emerged as a promising technology to improve spectrum
utilization. Capacity analysis is very useful in investigating the ultimate performance limits for …

Over the last decade, cognitive radios (CRs) have emerged as a technology for improving
spectrum efficiency through dynamic spectrum access techniques. More recently, as …

Cognitive radio employs dynamic spectrum access technology to enhance the utilization of
spectrum for ad-hoc networks. The unlicensed users or the secondary users make use of …

Recently, cognitive radio technology has gained worldwide attention due to its potential to
overcome spectrum scarcity. The technology allows unlicensed users to use licensed …

In advanced radio communication systems, most of the radio spectrum remains
underutilized. To fully utilize the radio spectrum, an efficient allocation of the scarce and …

A hybrid spectrum access strategy which is different from traditional underlay or overlay
strategy is proposed for cognitive radio networks. In proposed strategy, the secondary users …

In cognitive radio networks (CRNs) with multiple channels, various channel-assembling
(ChA) strategies may be applied to secondary users (SUs), resulting in different achieved …