高性能分组交换机内部体系结构综述  

An Overview of Internal Fabric Structures of High-Performance Packet Switches

作　　者：胡明昌[1] 史岗[1] 张喜红[1] 

机构地区：[1]中国科学院计算技术研究所系统结构室,北京100080

出　　处：《计算机工程与应用》2003年第14期86-89,95,共5页Computer Engineering and Applications

基　　金：国家自然科学基金项目(编号:60073018;69896250;69973046);中国科学院"九五"基础性研究重大项目(编号:983010);中科院计算所领域前沿青年基金项目(资助号:20016280-1)

摘　　要：交换机在电信部门和计算机行业发挥越来越重要的作用,其内部体系结构和调度算法决定交换容量和交换延迟,论文综述分组交换机的内部体系结构。分组交换机按结构可分为单级交换机和多级交换机。单级交换机内部结构可以分为输出缓冲的不相交路径拓扑结构、共享媒体结构、交叉开关结构、共用分组内存的时分结构、单级交换单元扩展的复合单级结构和并行交换单元结构,其特点是端口数目不多。多级交换机由多个级构成,每一级包含多个单级或多级交换单元,端口数目非常多,广泛应用于电信部门。Switches p lay an important role in the fields of telecommunication and computer.Their in ternal fabrics and scheduling algorithms determine the switching capacity and d elay.This paper surveys internal fabric structures of packet switches.Switches are classified into single-stage fabric and multistage fabric by their interna l architecture.The internal structures of single-stage switches are divided in to fabrics with disjoint-path topology and output queuing,fabrics with shared medium,crossbar-based fabrics,fabrics with common packet memory,complex fab rics extended with single-stage switching modules and fabrics with parallel swi tching modules.Multistage switch consists of multiple stages,each includes man y single-stage or multistage modules.The difference between single-stage swit ch and multistage switch is that the number of their input and output ports is different.Multistage switches have numerous ports while single-stage ones hav e several ports.

关 键 词：交换机 体系结构 分组 输入缓冲 输出缓冲 交叉开关 阻塞 

分 类 号：TP303[自动化与计算机技术—计算机系统结构]