Cognitive Radio Networks

Cognitive Radio Networks (CRNs) are advanced wireless systems where devices intelligently detect available radio frequencies and adapt their communication to avoid interference. This allows primary users—those with licensed rights—to share spectrum efficiently with secondary users who use unoccupied channels temporarily. CRNs optimize spectrum use by dynamically sensing environmental changes and adjusting transmission parameters, enhancing network capacity and reducing congestion. They are valuable for improving wireless communication overall, especially as demand for spectrum grows with increasing data needs. In essence, CRNs act as smart, adaptable radio systems that maximize resource utilization while respecting existing licensed users.