This paper investigates the secure communication issue for cognitive radio networks with
nonaltruistic users. The design objective is to improve the secrecy rate of the primary user …

Among 6G high-density connection applications, the cognitive Internet of Things (IoT) is
considered to be an effective means to cope with the problem of spectrum resource shortage …

Online healthcare social networks (OHSNs) play an essential role in sharing information
among medical experts and patients who are equipped with similar experiences. To access …

Dynamic spectrum access (DSA) can be leveraged by introducing external spectrum
sensing for secondary users (SUs) to overcome the hidden primary users (PUs) problem …

In this article, we focus on the problem of relay selection for the cooperative cognitive radio-
based Internet of things. In such systems, a pair of primary user devices (PUs) can only …

We consider a secure overlay cognitive radio network with an eavesdropper wherein a multi-
antenna secondary transmitter performs transmission in primary spectrum, on the condition …

Passive localization of the wireless signal source attracts a considerable level of research
interest for its wide applications in modern wireless communication systems. To accurately …

Research on mobile cyber–physical systems (MCPSs) that have the superiorities of cyber–
physical systems (CPSs) and expand their application range has become a trend in recent …

Secure the cooperative transmission is studied for an automatic repeat request (ARQ)-based
wireless network against a jamming-aided eavesdropper. The eavesdropper utilizes the …

Unmanned aerial vehicles (UAVs) assisted mobile edge computing (MEC) is an emerging
network architecture that has been considered as a promising transformative service …