摘要
光互连具有低功耗、大带宽等优越性能,可以实现数据中心节点数与交换容量的大幅增大。提出了一种基于阵列波导光栅(AWGR)的新型大容量光互连架构,通过可调波长转换器与AWGR提供波长路由,并利用分布式控制实现快速配置与低延迟。无缓冲的光交换机可能产生数据包争用,基于光纤延迟线的光缓冲可用于争用解决。详细描述了分别适用于严格无阻塞网络与大规模互连的两种实现方案,对所提架构在不同网络规模、流量模式、缓冲容量下的性能进行分析对比,仿真结果表明,该架构可以互连32768个节点,且具有低延迟与大吞吐量。
Optical interconnects have advantages of low power consumption and large bandwidth and can achieve a substantial increase in the number of nodes and switching capability for data centers. An arrayed waveguide grating router(AWGR) based architecture for high capacity optical interconnects is proposed in this paper. The tunable wavelength converter and AWGR are utilized to provide wavelength routing, and a distributed control is used to achieve fast configuration and low latency. Packet contention may occur at the buffer-less optical switches, and the optical buffering approach based on fiber delay lines(FDLs) is introduced for contention resolution. Two implementations are employed to support strictly non-blocking network and large-scale interconnection. In this paper, we analyze and compare the performance of the proposed architecture in terms of the network size, traffic mode, and buffer capacity. Simulation results indicate that the proposed architecture can interconnect 32768 nodes while providing low latency and high throughput.
作者
杨晓雪
胡冰
魏晓强
尚迎春
Yang Xiaoxue;Hu Bing;Wei Xiaoqiang;Shang Yingchun(College of Information Science and Electronic Engineering,Zhejiang University,Hangzhou,Zhejiang 310027,China;Intelligent Network Research Center,Zhejiang Lab,Hangzhou,Zhejiang 310027,China;State Key Laboratory of Mobile Network and Mobile Multimedia Technology,ZTE Corporation,Hangzhou,Zhejiang 518055,China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2021年第14期18-28,共11页
Acta Optica Sinica
基金
国家重点研发计划(2019YFB1802905)
国家自然科学基金面上项目(61971377)。
关键词
光通信
光互连架构
无阻塞网络
低延迟
高吞吐量
丢包率
optical communications
optical interconnect architecture
non-blocking network
low latency
high throughput
packet loss probability
