Teaching Physical-Layer Security through Cognitive Relay Simulations: A Scenario-Based Engineering Education Framework
Main article
Abstract
Physical-layer security (PLS) and cognitive radio (CR) relaying are increasingly relevant topics in the engineering curriculum, yet their presentation in undergraduate and early postgraduate programmes often remains heavily theoretical, leaving students with limited intuition for how reliability and confidentiality interact under realistic wireless conditions. This article proposes a scenario-based engineering education framework that uses cognitive relay simulations as the central learning artefact for teaching PLS. Drawing on simulation-based learning, scaffolding theory, and competency-oriented assessment, the framework organises learning into four progressive stages — Foundation, Reliability, Security, and Optimisation — each anchored in a computational scenario in which students manipulate channel models, transmit power policies, eavesdropper geometries, antenna diversity, and hop counts to observe how outage probability and intercept probability respond. We describe the pedagogical design, the instrumentation in MATLAB and Python, and a set of assessment artefacts that capture both technical mastery and reflective reasoning. A synthetic mixed-cohort dataset of thirty-eight students is used to illustrate how learning analytics can be combined with the simulation outputs themselves to evaluate where students develop strong intuition and where misconceptions persist. Results indicate that scaffolded, scenario-based simulation can move students beyond memorisation of closed-form expressions toward design-level reasoning about reliability and confidentiality trade-offs. The article concludes with implications for instructor practice, curricular integration, and transferability to adjacent topics in wireless engineering education.
