用光学分布时钟实现位同步的光互连网络设计  

Design of an Optical Interconnect Network with Optical Distribution Clock for Global Synchronization

作　　者：井文才[1] 张以谟[1] 周革[1] 李海峰[1] 李朝辉[1] 邓玉秀[1] 张红霞[1] 满小明[1] 

机构地区：[1]天津大学精密仪器与光电子工程学院

出　　处：《光电子．激光》2002年第1期37-39,共3页Journal of Optoelectronics·Laser

基　　金："8 63"计划资助项目 (863 -3 0 7-16-18)

摘　　要：本文采用时分复用技术和高速交叉开关实现 80 Gbit/ s的数据交换 ,通过引入光学分布时钟减小光信道之间进行切换时的链路重建时间。采用该位同步结构 ,可把机群系统网络互连通道切换时的链路重建时间由 ms量级减小到μs量级。数据包在网络中的通信延迟可减少 2～ 3个数量级。当时钟速率为1GHz,要求各结点的时钟相位差小于 5 %时钟周期时 ,对光纤长度误差要求为 1cm。In this Network,time division multiplexing technique and high speed cross connect switch have been adopted to achieve 80 Gbit/s data switching.The distributed optical closk has been introduced to decrease link set up time when optical channels are switched.Adopting this bit synchronization architecture,the link set up time on the order of millisecond can be decreased to several microseconds.Data packet communication latency can be decreased to several microseconds.Data packet communication latency can be decreased two to three magnitudes in the computer cluster.The requirement on fiber length error is 1 cm when the clock phase skew is limited to 5 percent of a clock period at 1 GHz.

关 键 词：光学分布时钟 位同步 光互连网 网络设计 计算机网络 

分 类 号：TP393.4[自动化与计算机技术—计算机应用技术]