Abstract: WiMAX can support heterogeneous services as one of broadband wireless metropolitan area network access technologies.To guarantee the QoS requirements of these service flows，efficient scheduling algorithm plays a key role.A hierarchical scheduling algorithm is proposed，which designs the uplink and down scheduling jointly.It can adaptively adjust uplink and downlink sub-frame according to their traffic，and can meet the QoS requirement.At the same time，the fairness is taken into account sufficiently.Simulation results show the proposed algorithm is efficient.

摘要： WiMAX作为一种宽带无线城域网接入技术，能够支持多种类型的业务传输。为了保证不同业务的服务质量（QoS），有效的调度算法是其中的一个关键。提出了一种分级的调度算法，并且将上行调度和下行调度联合设计，根据上下行流量自适应调整上下子帧的比例，满足业务QoS要求的同时，充分考虑调度的公平性。仿真结果表明建议算法是一种有效方法。