区分服务中AF类的一种调度算法
A Scheduling Algorithm for Assured Forwarding Aggregated Flows of Differentiated Services
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摘要: 该文根据区分服务中确保转发(Assured Forwarding,AF)类的特点,设计了一种新的调度算法公平加权轮循(Fair、Weighted Round Robin,FWRR)算法。 FWRR是一种基于轮循、工作保持型、适于变长分组的调度算法.它的实现简单,算法复杂度为O(1).仿真实验和数学分析表明,FWRR算法不仅能够提供保证最小带宽的服务,而且能够按比例分配剩余带宽,适合用来调度区分服务中的AF类.Abstract: According to the characteristics of Assured Forwarding (AF) aggregated flows of Differentiated Services(DiffServ), a new scheduling algorithm, named Fair Weighted Round Robin(FWRR) is proposed. FWRR is a work-conserving round robin scheduling algorithm for variable size packets. It has a very low implementation complexity of O(1). Simulation results and mathematic analyses show that FWRR can make each queue at least occupy a minimum reserved bandwidth and share some extra bandwidth proportionally. Therefore, FWRR is a suitable scheduling algorithm for the AF flows of DiffServ.
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