一种基于IEEE 802.16j网络的带宽调度方案*

针对IEEE 802.16j网络,提出了一种上行业务的动态联合带宽资源调度方案。根据该网络系统树状拓扑结构,在基站BS和中继站RS间采用分级分布式资源调度体制,从而既保障了业务的带宽需求,又提升了上行带宽利用率,同时还提出了针对不同类型业务采用不同的调度算法,改善了调度的公平合理性。仿真结果表明,提出的动态联合调度方案相比严格优先级调度更具灵活性,能够在兼顾用户速率公平的条件下有效地保证各种服务的QoS要求,同时也可获得较高的带宽资源利用率。

Bandwidth scheduling scheme based on IEEE 802.16j network

For the IEEE 802.16j network,this paper proposed a dynamic joint bandwidth resource scheduling strategy for the services in uplink.According to the tree-topology of IEEE 802.16j system,used a hierarchical distributed resource scheduling scheme between the base station(BS) and the relay station(RS),which enhanced the bandwidth utilization and provided various multimedia communications with QoS guarantee effectively.At the same time,this paper proposed different scheduling algorithm for different types of services to improve the fairness.Simulation results show that the proposed scheme is more flexible than strict priority scheduling.It can meet various QoS requirements of multimedia services well without sacrificing services’rate fairness,and get the preferable utilization of bandwidth in WiMAX system.