RESEARCH ON CROSS-LAYER SCHEDULING ALGORITHM BASED ON COGNITIVE NETWORK

摘要

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 propescd in this paper. The average waiting time and packet transmission rate arc respectively used to measure the fairness of real-time operational system and non-real-time operational system. Simulation results arc 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.