一种改善IP网络中基于类的数据服务QoS的调度方法
A Scheduling Algorithm for Improved QoS Support of Multiclass Data Service on IP Networks
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摘要: IP网络中基于类的数据服务QoS支持一般包括包的延时、吞吐量和丢失率，目前的研究成果大都集中于对其中某一个指标的确保或支持。该文提出一种在IP网络中一个网络路由器节点上同时考虑类间流量带宽、包丢失和延时区分的队列管理调度算法，称为动态比例自适应算法(Dynamic Proportional Adaptive Algorithm，DPAA)。该算法是针对比例区分服务PDS(Proportional Differentiated Services)中流量负载频繁变化的情况提出的。仿真实验通过与前人提出的基于比例区分服务模型的调度算法比较，证明了DPAA 算法的有效性。
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关键词:
- 比例区分服务;调度算法;服务质量
Abstract: QoS supports of multiclass data service in IP network includes generally packet delay, throughput and loss rate, while the majority last research focus on either minimizing packet delay and loss or maximizing user throughput. In this paper, an algorithm DPAA (Dynamic Proportional Adaptive Algorithm) for assuring the difference service under traffic vary-time condition in Proportional Differentiated Services(PDS) model is proposed. The scheme takes into account the throughput, delay and loss rate of packets between classes simultaneously. Simulation indicates that the DPAA has a good performance compared to the previous works. -
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