中继网络一种改进的QAPF调度算法研究

摘要

针对QAPF调度算法存在的吞吐量与公平性矛盾的问题,提出了一种改进的QAPF调度准则(RQAPF).该准则利用队列门限值降低了队列状态信息对调度准则的影响,保证了用户的公平性,但与QAPF调度准则相比,降低了系统吞吐量.在此基础上提出了具有载波配对的RQAPF调度算法(SubPairRQAPF),仿真表明该算法在满足系统公平性要求的同时能够提高频谱利用率.%In order to solve the conflict between throughput and fairness for QAPF scheduling algorithm, this paper proposed a modified QAPF scheduling rules which called relative queue aware proportional fairness scheduling (RQAPF). The RQAPF could reduce the impact of the queue status information by setting the queue threshold, and ensured the fairness of the user.However, compared with QAPF scheduling algorithm,the RQAPF reduced the throughput. To overcome this shortcoming, this paper further proposed RQAPF algorithm based on subcarrier pair method(SubPairRQAPF). Simulation results show that the algorithm can meet the requirements of fairness and can improve the spectrum efficiency at the same time.