Cognitive Radio (CR) is a promising technology to overcome spectrum scarcity, which
currently faces lots of unsolved problems. One of the critical challenges for setting up such …

Cognitive radio enables secondary users (SUs) to explore and exploit the underutilized
licensed channels (or white spaces) owned by the primary users. To improve the network …

Cognitive radio technology is an assuring solution for under-utilization of licensed spectrum
bands and overcrowding of unlicensed spectrum bands, in which secondary user is …

In recent years, the social internet of things (SIoT) has become a research hot topic in the
field of wireless networks, which are inseparable relationships between human and devices …

In recent years, the Social Internet of Things (SIoT), which represents inseparable
relationships between humans and devices, has become a hot research topic in wireless …

Routing is a fundamental problem and has been extensively studied in various networks.
However, in highly dynamic networks (eg, wireless ad hoc networks), nodes have limited …

Abstract Cognitive Radio Networks (CRNs) have emerged to overcome the problem of
spectrum scarcity caused by spreading of wireless applications. In CRNs, Secondary Users …

Opportunistic routing has increased the efficiency and reliability of Cognitive Radio Ad-Hoc
Networks (CRAHN). Many researchers have developed opportunistic routing models …

To overcome the problem of underutilizing licensed spectrum, Cognitive Radio Networks
(CRNs) have emerged in which Secondary Users (SUs) are allowed to access …

In recent years, a large number of smart devices will be connected in Internet of Things (IoT)
using an ad hoc network, which needs more frequency spectra. The cognitive radio (CR) …