SEIZING THE SPECTRUM: COGNITIVE RADIO NETWORKS' PATH TO EFFICIENT COEXISTENCE
P. Chitralingappa, Nazeer Shaik · 2023
The escalating demand for wireless communication services has led to a critical shortage of available radio spectrum. Cognitive radio networks emerge as a promising solution to this challenge by enabling dynamic and intelligent spectrum access. This paper presents an in-depth exploration of cognitive radio networks, focusing on spectrum management and coexistence strategies. We delve into the fundamental concepts of cognitive radio networks, highlighting their ability to opportunistically exploit underutilized frequency bands while ensuring minimal interference with licensed primary users. The paper covers essential topics such as spectrum sensing techniques, dynamic spectrum access, spectrum mobility, coexistence protocols, and spectrum sharing models. Case studies illustrate practical implementations in wireless sensor networks, 5G systems, and Internet of Things (IoT) applications. Moreover, we address challenges, including security and privacy concerns, and discuss the integration of cognitive radio networks with emerging technologies like AI, machine learning, and blockchain. This comprehensive overview underscores cognitive radio networks' potential to revolutionize spectrum utilization, offering a path toward efficient and harmonious wireless communication.