两种高吞吐量低延迟光数据中心网络架构研究  

Research of Two Optical Data Center Network Frameworks with High Throughput and Low Latency

作　　者：熊丽婷 张绍彪[1] 揭吁菡 XIONG Li-ting;ZHANG Shao-biao;JIE Xu-han(Institute of Technology,East China Jiaotong University,Nanchang 330100,China)

机构地区：[1]华东交通大学理工学院,南昌330100

出　　处：《光通信研究》2020年第6期17-20,76,共5页Study on Optical Communications

基　　金：教育部产学研合作协同育人资助项目(201901149006);江西省教育厅科学技术研究资助项目(GJJ191583);华东交通大学理工学院课题资助项目(XJJG2019-3)。

摘　　要：针对电数据中心网络(DCN)延迟高和吞吐量低等问题,文章提出了两种无源光DCN架构,一种针对小型DCN,一种针对大型DCN。两种架构均采用了阵列波导光栅路由器(AWGR)、耦合器和解复用器等无源光器件,并针对每种规模的架构给出了波长分配和分组传输方法。仿真结果表明,与电DCN(如Fat-tree和扁平蝶(FBFLY)网络)相比,所提方法具有更低的延迟和更高的吞吐量。而与其他光互连架构(如数据中心光开关(DOS)和Petabit)相比,其性能大致相当,分组延迟低于18μs,但成本更低。Aiming at the problem of high latency and low throughput in electric Data Center Network(DCN),two kinds of passive optical DCN architecture are proposed,one for small DCN and the other for large DCN.Using passive optical devices such as Arrayed Waveguide Grating Router(AWGR),coupler and demultiplexer,wavelength assignment and packet transmission algorithms are proposed for each scale architecture.The results show that the proposed method has lower latency and higher throughput compared with electric DCN,such as Fat-tree and Flat Butterfly(FBFLY)networks.It is also shown that the performances of proposed optical DCN architectures are similar to those of other optical interconnection architectures(such as Datacenter Optical Switch(DOS)and Petabit).The packet delay is less than 18μs with lower cost.

关 键 词：数据中心网络 阵列波导光栅路由器 波长分配 延迟 吞吐量 

分 类 号：TN915[电子电信—通信与信息系统]