一种用于IEEE 802.16无线城域网TDD模式中的带宽调度方案
A Bandwidth Scheduling Architecture for IEEE 802.16 Wireless MAN in TDD Mode
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摘要: 该文提出了一种用于IEEE 802.16宽带无线接入系统TDD模式下的公平而有效的带宽分配调度体系。与该领域中传统的固定带宽分配方式相比，该文提出的调度体系结构综合考虑了上下行链路不同业务带宽需求并进行动态带宽分配。该文提出一种新的亏空公平优先级队列(DFPQ)算法来调度不同优先级的业务流，可以为系统提供更好的公平性。仿真结果显示该文提出的调度体系结构能够很好地满足所有类型业务的服务质量(QoS)需求，并提供较好的公平性。Abstract: A fair and efficient bandwidth allocation scheduling architecture for IEEE 802.16 Broadband Wireless Access (BWA) systems in TDD mode is proposed. In this area, comparing with the traditional fixed bandwidth allocation, the proposed scheduling architecture allocates uplink and downlink bandwidth simultaneously and dynamically. A Deficit Fair Priority Queue (DFDQ) algorithm is proposed to schedule different service flow, which provides more fairness to the system. The simulation results show the proposed architecture can meet the QoS requirement and fairness for all types of traffic.
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