基于SDN的四层多粒度光交叉连接体系研究  

A study on four-layer multi-granularity optical cross-connect system based on SDN

作　　者：王玉宝[1] 苏明 王琪龙 李龙飞 Wang Yubao;Su Ming;Wang Qilong;Li longfei(School of Information Science and Engineering,Yanshan University,Hebei Key Laboratory of Information Transmission and Signal Processing,Qinhuangdao 066004)

机构地区：[1]燕山大学信息科学与工程学院河北省信息传输与信号处理重点实验室,秦皇岛066004

出　　处：《高技术通讯》2021年第9期953-961,共9页Chinese High Technology Letters

基　　金：河北省自然科学基金(F2020203099)资助项目。

摘　　要：在波带交换的基础上加入光码粒度,构成包括光纤、波带、波长、光码粒度的四层多粒度光交叉连接(MG-OXC)结构,并应用码群路由(CGRE)技术使多个波长通道级联,构成波带交换和CGRE共存的混合捆绑体系,提出混合算法以缓解端口数目过多和波长利用率较低的问题,使业务在各个粒度灵活上下路。将基于通用多协议标签交换(GMPLS)的四层多粒度光交叉连接结构体系作为软件定义网络(SDN)体系中数据转发层的一部分,由软件定义网络控制器进行集中管理,可优化网络结构。通过对波长利用率、端口需求数目和系统丢包率3方面的仿真分析,验证了该网络体系的优秀性能。On the basis of waveband switching,multi-granularity optical cross-connect(MG-OXC)structure adds optical code granularity to constitute four-layer MG-OXC,which includes optical fiber,waveband,wavelength and optical code four types granularity.In addition,the code group routing entity(CGRE)technology is used to cascade multiple wavelength channels to build a hybrid bundling system including waveband switching and CGRE.A hybrid algorithm is proposed to ameliorate the problem of too many ports and low wavelength utilization,which could flexibly add and drop off services at various granularities.The four-layer MG-OXC structure system is based on generalized multiprotocol label switching(GMPLS),and it is used as a part of the data forwarding layer in the software defined networking(SDN).The SDN controller has the advantage of centralized management and optimizing network structure.By analyzing the wavelength utilization,port number and the system packet loss rate,the performance of the system is verified.

关 键 词：四层多粒度光交换 软件定义网络(SDN) 波带交换(WBS) 光码分复用(OCDM) 码群路由体(CGRE) 波长利用率 端口数 丢包率 

分 类 号：TN929.1[电子电信—通信与信息系统]