大规模计算系统光互联中的光接口设计

发布时间：2018-05-10 22:04

本文选题：业务类型感知 + OpenFlow　；参考：《北京邮电大学》2014年硕士论文

【摘要】：由于传统的电互联存在瓶颈,因此随着大规模计算系统的发展,迫切需要将光互联引入其中。作为大规模计算系统的一个重要分支,数据中心中存在着不同类型的业务,这些业务对网路互联时延具有不同的要求,但是在现有的光互联网光接口研究中却很少考虑如何对不同的网络流量进行有效的适配。因此,本论文提出一种具备业务感知型组帧机制的光接口,并基于高性能FPGA以及嵌入式硬件平台,重点讨论了其组帧汇聚以及OpenFlow开放式控制机制的设计和实现。此外,光性能监测(Optical Performance Monitoring)在未来全光网络的性能保障中承担着重要角色,尽管目前OPM模块已经在一些论文中得到应用,然而却鲜有OPM模块设计的相关报道。因此,本论文首次基于检测低频拍噪声监测OSNR原理设计并实现了一种可应用于动态可重构全光网络的OPM模块。同时,基于该模块,设计了种具有OPM监测能力以及OpenFlow开放式控制接口的WSON光节点。论文的主要工作和创新点可以归纳为以下几点： 1)面向数据中心网络应用,研究和设计了一种具备业务感知型组帧机制的光接口,对如何将不同要求的业务流量进行有效适配进行了重点讨论。基于FPGA平台,对该光接口进行了硬件实现并对各个分模块进行了波形仿真,仿真结果表明各分模块都能正常工作。 2)针对数据中心内光接口的控制需求,通过采用OpenFlow协议并对其Vendor消息进行相应扩展,实现了中央控制器对光接口上业务类型的感知以及对组帧策略的配置,并基于实验网络平台成功地对扩展的OpenFlow控制方式进行了实验验证 3)首次基于检测低频拍噪声监测OSNR的原理,设计并实现了种结构简单、监测速率快、对不同调制格式透明的OPM模块。经过实验测试,该模块可对10Gb/s NRZ QPSK和10Gb/s NRZ OOK信号进行OSNR监测,且单次监测时间可低至几十ms。 4)设计了一种具备OPM监测能力以及OpenFow开放式控制接口的WSON光节点,重点讨论了中央控制器如何通过扩展的OpenFlow协议对光节点上的光交换矩阵进行配置并对光信号进行OPM监测。
[Abstract]:Due to the bottleneck of traditional electrical interconnection, with the development of large-scale computing systems, it is urgent to introduce optical interconnection into it. As an important branch of large-scale computing systems, there are different types of services in the data center, which have different requirements for network interconnection delay. However, in the research of optical interface of optical Internet, how to adapt different network traffic effectively is seldom considered. Therefore, this paper proposes an optical interface with a business-aware framing mechanism. Based on the high performance FPGA and embedded hardware platform, the design and implementation of frame aggregation and OpenFlow open control mechanism are discussed. In addition, Optical Performance Monitoring (OPM) plays an important role in the future all-optical network performance assurance. Although the OPM module has been applied in some papers, there are few reports on the design of OPM module. Therefore, based on the principle of low frequency beat noise monitoring (OSNR), a OPM module for dynamic reconfigurable all-optical network is designed and implemented in this paper. At the same time, based on this module, a kind of WSON optical node with OPM monitoring ability and OpenFlow open control interface is designed. The main work and innovation of this paper can be summarized as follows: 1) for the application of data center network, we study and design an optical interface with traffic awareness framing mechanism, and focus on how to adapt the traffic of different requirements effectively. Based on the FPGA platform, the hardware implementation of the optical interface and the waveform simulation of each sub-module are carried out. The simulation results show that each sub-module can work normally. 2) aiming at the control requirement of optical interface in data center, by adopting OpenFlow protocol and extending the corresponding Vendor message, the central controller realizes the perception of the service type on the optical interface and the configuration of framing strategy. The extended OpenFlow control method is successfully verified based on the experimental network platform. 3) based on the principle of detecting low-frequency beat noise monitoring OSNR for the first time, a OPM module with simple structure, fast monitoring rate and transparent modulation format is designed and implemented. The experimental results show that this module can monitor 10Gb/s NRZ QPSK and 10Gb/s NRZ OOK signals by OSNR, and the time of single monitoring can be as low as tens of Ms. 4) A kind of WSON optical node with OPM monitoring ability and OpenFow open control interface is designed, and how the central controller configures the optical exchange matrix on the optical node and monitors the optical signal by the extended OpenFlow protocol is discussed.
【学位授予单位】：北京邮电大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP393.06

【参考文献】