Dynamic switching strategies for jamming mitigation in hybrid FSO-RF networks: analysis and performance metrics

A novel dynamic switching scheme that adapts based on the presence or absence of a jammer is proposed in this research. The system dynamically prioritizes either the free space optical (FSO) or radio frequency (RF) channels depending on real-time conditions. Specifically, Scheme I is used in the absence of a jammer, where the RF channel functions as a backup and the FSO channel receives higher priority. In the presence of a jammer, Scheme II gives higher priority to the RF link, while the FSO link acts as a backup. The performance of this modified FSO-RF system was examined, focusing on outage probability and average bit-error rate (ABER). Closed-form expressions for these metrics were derived and validated through Monte Carlo simulations. We additionally formulate more straightforward asymptotic approximations. Numerical results demonstrate that the proposed dynamic scheme outperforms current hybrid RF/FSO systems, particularly in jamming scenarios.