A Cross-Layer Rethink on the Sensing-Throughput Tradeoff for Cognitive Radio Networks

摘要

This letter investigates the sensing-throughput tradeoff problem in cognitive radio networks from a cross-layer perspective, jointly considering the impact of imperfect spectrum sensing and access contention. Furthermore, the optimized solution to this tradeoff is formulated via taking the interference probability, rather than the detection probability, as the optimization constraint. Compared with the results obtained only from the physical layer, the proposed solutions can improve the secondary throughput significantly.