一种具有QoS保障能力的T比特路由器交换结构的实现  

Implementation of switch architecture with QoS guarantee capability in terabit router

作　　者：刘勤让 [1] 邬江兴 [2] 汪斌强 [1] 

机构地区：[1]国家数字交换系统工程技术研究中心,郑州,450002 [2]解放军信息工程大学信息工程学院,郑州,450002

出　　处：《高技术通讯》2005年第11期1-5,共5页Chinese High Technology Letters

基　　金：国家自然科学基金

摘　　要：为了在能够通过较小的交换网络加速比就可以实现与OQ相比拟的时延和100%的吞吐率的CIOQ交换结构中支持DiffServ QoS模型,提出了一种在输入端口和输出端口采用两级调度和队列管理的具有QoS保障能力的交换结构.输入侧采用MTRED+PDMCRR模式,输出侧采用WRED+PQ混合调度模式,给出了详细的设计分析,并通过仿真实验验证了该结构可以良好地支持DiffServ中各种业务的QoS性能.Combined Input-output queuing （CIOQ） has been widely considered as the most feasible solution for large-capacity switches, which can achieve 100% throughput and perfectly emulate OQ performance with a small switch speedup factor. In order to support the DiffServ QoS model under CIOQ, a switch architecture with two stage scheduling and queue-management scheme is proposed. The MTRED ＋ PDMCRR, which are presented in this paper, are used at the input queues, and WRED ＋ PQ are selected to implement the queue-management and scheduling at the output queues. The simulation results show the scheme can well support PHBs proposed by DiffServ.

关 键 词：交换结构 QOS PDMCRR MTRED WRED PQ 

分 类 号：TP393.4[自动化与计算机技术—计算机应用技术] TN915.01[自动化与计算机技术—计算机科学与技术]