支持多样化服务的交换结构及调度算法

区分服务是目前网络支持多样化服务质量保障的重要手段,现有交换结构和调度算法在支持多样化服务方面存在不足.文章提出了一种支持多样化服务的交换结构,该结构通过分离业务类为每类业务提供专一和定制化的服务.针对复用器内部竞争输出端口的问题,提出了一种新的复用器调度算法,该算法采用带宽分配指示向量和队列长度计数器,能够有效地保障各类业务在输出端口的服务质量和业务类之间的公平性.仿真实验表明,该交换系统能够保证各类业务都获得较为满意的服务质量性能.

Switch Fabric and Scheduling Algorithm Supporting Diversified Services

Current switch fabric encounters its bottleneck in supporting diversified services. This paper proposes a novel switch fabric for supporting diversified services, which can provide concentrated and customized services for traffic class by separating traffic classes. For the problem of output competing inside multiplexers, this paper presents a new multiplexer dispatching algorithm to guarantee effectively the service quality and the competition fairness between traffic classes by means of a bandwidth allocation indication vector and by a queue length counter. Simulation results show that this switch can provide satisfying service quality for every traffic class.