基于OFDMA系统的用户调度算法的比较研究

Comparative Study of Users Scheduling Algorithm Based on OFDMA System

OFDMA系统的资源调度是解决多个业务竞争共享资源问题及提高系统容量的一种有效方法。本文基于OFDMA系统下行链路,针对支持非实时业务的3种经典分组调度算法进行了对比研究,仿真了系统总吞吐量和算法公平性。仿真结果表明,与轮询调度、最大载干比调度相比,比例公平调度算法实现了系统吞吐量和公平性的良好折中,具有明显的优越性。并指出了资源调度算法的改进方向。

The resource scheduling in the system of OFDMA is an effective method which can solve the resource-sharing problem in multi-service competition and improve the capacity of the system.Based on the down-link of the OFDMA system,this paper makes a comparative study on three classical packet scheduling algorithms which support Non-Real-Time（NRT） services and simulates the total throughput of the system and the fairness of the algorithms.The result shows that,compared with RR scheduling and Max C/I scheduling,the PF scheduling algorithm gets an excellent compromise between throughput and fairness,so it has obvious advantages.Finally,this paper points out the direction of improving resource scheduling algorithms.