一种基于FPGA实现的高速多路交换开关  

Design of a High-Speed Crossbar Based on FPGA

作　　者：罗莉[1] 庞征斌[1] 何鸿君[1] 徐炜遐[1] 

机构地区：[1]国防科技大学计算机学院,湖南长沙410073

出　　处：《计算机工程与科学》2007年第8期151-152,F0003,共3页Computer Engineering & Science

摘　　要：多路交换开关是高性能交换部件的核心。本文描述了基于Xilinx公司Virtex-II系列FPGA的特点设计和实现的一种高速多路交换开关,它由输入信道组织、内部无阻塞crossbar交换和仲裁调度器三部分组成。仲裁调度器的设计是多路交换开关的关键,申请和仲裁许可的完成时间关系到整个实现的综合频率和性能。我们提出一种改进的行波流水仲裁器设计,它公平有效,工作频率达到135MHz,在实际应用中效果良好。Crossbar is a key component of the high-performance exchange switch used in multicomputer interconnection networks or routers. In this paper, the design and implementation of a high-speed crossbar based on Xilinx Virtex-Ⅱ FPGA is presented,and this crossbar includes the input channels, the arbiter and the crossbar. This paper focuses on the design and implementation of the crossbar arbiter. A fair and efficient arbiter is very important for maximizing network performance, and it is the critical path that limits the system clock. An improved wavefront arbiter is put forward,which runs well at 135MHz,and proves to be efficient in practice.

关 键 词：FPGA 多路交换开关 行波仲裁 

分 类 号：TP302[自动化与计算机技术—计算机系统结构]