A cross-layer scheduling algorithm with QoS-aware for cognitive radio systems

A novel cross-layer scheduling algorithm with guaranteed QoS is proposed in CRN. A distinct scheduling priority integrating UCSI, QSI and QoS requirements is first proposed for CUs. Base on these scheduling priorities and specific scheduling mechanism, packet scheduling and channel allocation are jointly designed. The simulation results reveal that the proposed algorithm suffers a limited decline in system throughput while reduces the packet delay and packet dropping probability effectively for cognitive users. By the optimized channel assignment with the Channel Allocation Weight, a better performance for spectral utility, packet delay and packet dropping probability is obtained under the dynamic UCSI in CRN.