5G非正交接入系统PF调度策略研究

Research on the PF Scheduling Algorithm for Non-orthogonal Multiple Access System of 5G

为了应对未来通信系统在吞吐量和接入数量等方面更高的需求,非正交多址接入(NOMA)技术作为5G的候选技术得到广泛的关注。在LTE中广泛使用的比例公平(PF)调度策略,可以在用户接入公平性和吞吐量之间达到良好的折中,已被考虑在NOMA系统中使用。主要分析了基于PF调度准则的NOMA系统的实现原理和基本的调度流程,然后对比分析了NOMA多用户调度中的用户MCS选择和功率分配算法的实现方式以及所存在的问题。最后进行NOMA链路仿真分析,给出未来NOMA调度研究的主要方向。

In order to respond to the challenge of providing significantly higher system capacity in the upcoming decade, non-orthogonal multiple access （NQMA） has been investigated as one of the candidate multi-user access technologies for 5G. Proportional fair scheduling can be increased in the performance between system capacity and user fairness in LTE system, it had been considered for user in NQMA systems. It mainly analyzes the implementation principle and basic scheduling procedure of PF scheduling criterion in NQMA system, and then compares and analyzes the key technologies and existing problems of sched-uling. Finally, the simulation results are verified and introduce the main research direction of future NOMA.