一种可提供QoS保障的新型交换结构  

Providing QoS Guarantees in a Novel Switch Architecture

作　　者：伊鹏[1] 汪斌强[1] 郭云飞[1] 李挥[2] 

机构地区：[1]国家数字交换系统工程技术研究中心,河南郑州450002 [2]北京大学深圳研究生院,广东深圳518055

出　　处：《电子学报》2007年第7期1257-1263,共7页Acta Electronica Sinica

基　　金：国家"十五"863计划信息技术领域重大专项(No.2005AA121210);国家自然科学基金(No.60572042)

摘　　要：本文采用带缓存交叉开关作为核心交换单元,构建了一种空分复用扩展的联合输入/交叉节点/输出排队(SDM-CICOQ)交换结构,从理论上证明了当扩展因子为2时,SDM-CICOQ交换结构可以获得100%的吞吐量,并且能够完全模拟输出排队(OQ)交换结构,从而能够提供服务质量(QoS)保障.本文还给出了一种层次化优先级调度(HPS)方案作为SDM-CICOQ交换结构调度机制的工程设计参考,仿真结果表明采用HPS调度方案SDM-CICOQ交换结构可获得良好的性能.Using buffered crossbar as a core switch fabric, we build a combined input-cmsspoint-output queued switch with space-division multiplexing expansion （denoted as SDM CICOQ switch） in this paper. It is proved that an SDM CICOQ switch with an expansion factor 2 can achieve 100% throughput and exactly emulate an OQ switch. Thus,SDM CICOQ switches can provide QoS guarantees for Iraffic flows. For the simplicity of implementation, we also present a hierarchical priority scheduling （HPS） scheme as a reference designing for the scheduling policy of the SDM CICOQ switch. Simulation results show that the SDM CICOQ switch operating under the HPS scheduling scheme can obtain good performance.

关 键 词：交换结构 服务质量 带缓存交叉开关 调度 优先级 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]