Changpeng Ji, Xiaoqiu Nie, and Dian Liu
Cognitive network, cross-layer scheduling algorithm, QoS, power interference, services type
In allusion to the problem that cognitive users have diﬀerent quality of service (QoS) requirements, we take power interference, wireless channel conditions, services priorities, QoS satisfaction level and fairness constraints, and other factors into consideration. A cross-layer scheduling algorithm which could control interference and ensure QoS is proposed in this paper. The average waiting time and packet transmission rate are respectively used to measure the fairness of real-time operational system and non-real-time operational system. Simulation results are computed and the results are shown. Delay performance of real-time traﬃc and throughput performance of non-real-time traﬃc are guaranteed by setting reasonable weight to index, and power interference to authorized users caused by cognitive users is reduced obviously.