提出了一种无缓存光分组交换机搭建的平坦型数据中心网络架构——架顶平坦互联,并在OMNe T++仿真平台上对架顶平坦互联架构进行仿真实验,得到架顶平坦互联架构在不同业务分布、不同业务模式和不同缓存容量条件下的系统平均时延、分组丢失率和吞吐率的仿真结果.结果表明,基于端口无缓存光交换机的架顶平坦互联架构数据中心网络具有良好的时延特性、网络吞吐率、可扩展性和成本效益. A flat data center network structure - top flat interconnection constructed by uncached optical packet switch was proposed and the simulation experiment of top flat interconnection architecture was carried out on OMNe T ++ simulation platform. The top flat interconnection architecture was obtained in different services The simulation results of system average delay, packet loss rate and throughput under different service modes and different buffer capacity.The results show that the data center network based on portless cache optical switch has the advantages of good delay Features, network throughput, scalability and cost-effectiveness.