基于WiMAX技术的上行调度算法

An uplink packet scheduling algorithm based on WiMAX

针对WiMAX对业务流QoS定义和已有的调度架构,提出了一种适用于WiMAX的上行调度算法——改进的分级调度算法(ICBQ),解决了系统负载较高时低优先级业务长时间得不到服务的问题。仿真结果表明,ICBQ算法在不降低rtPS业务流QoS要求的前提下,有效地提高了nrtPS、BE业务流的调度机会,高效地利用了系统的带宽资源,提高了用户公平性。

According to the Quality of Service （QoS） definition of traffic flows by WiMAX and the existing scheduling framework, an improved scheduling algorithm （ICBQ） is proposed, which is suitable for WiMAX uplink. The algorithm resolves the problem that low-priority flow can not receive service for a pretty long time when the load of the system is heavy. Simulation results show that the improved algorithm gives much higher scheduling opportunities to non-real-time Polling Service （nrtPS）, Best Effort （BE） traffic flows, the system bandwidth is utilized effectively, fairness between users is improved, at the same time, QoS of real-time Polling Service （rtPS） traffic flow is not lowered.