基于数字交叉开关的波分复用光互连网络设计

Design of WDM Optical Interconnection Network Based on a Digital Crosspoint Switch

设计了一种双层波分复用(WDM)光互连网络。上层为采用WDM和硬件路由技术的光纤环网,下层为采用8通道10Gbit/s数字交叉开关设计的星型网络。根据互连带宽要求,分别设计了两种支持1.056Gbit/s和4.224Gbit/sPCI总线全带宽的光网络接口卡(ONIC)。利用现场可编程门阵列(FP GA)在光互连网络中实现了数据包的硬件路由以及数字交叉开关的动态配置。随着网络规模扩展,每增加1个子网,子网间最大通信延迟增量仅为1.5μs。

A two-layer wavelength division multiplexing (WDM) optical interconnection network was designed. The top layer was an optical fiber ring network using wavelength division multiplexing and hardware routing techniques. The sub-layer was a star network based on an 8-channel digital crosspoint switch with throughput of 10 Gbit/s. According to the requirements of interconnection bandwidth, two types of optical network interface cards (ONIC) were designed to support peripheral component interface (PCI) bus full bandwidth of 1.056 Gbit/s and 4.224 Gbit/s, respectively. With field programmable gate array (FPGA), hardware routing of data packages and dynamic configuration of digital crosspoint switch are realized. By adding a subnet to enlarge the network, the maximal delay increment is only 1.5 μs.