高速光网络时钟恢复算法设计与实现  

Design and Implementation of Clock Recovery Algorithm for High Speed Optical Transmission System

作　　者：徐源浩 吕建新[2,3] XU Yuan-hao;LüJian-xin(l.Wuhan Research Institute of Posts and Telecommunications,Wuhan 430074,China;State Key Laboratory of Optical Communication Technologies and Networks,Wuhan 430074,China;FiberHome TelecommunicationTechnologies Co.,Ltd.,Wuhan 430205,China)

机构地区：[1]武汉邮电科学研究院,武汉430074 [2]光纤通信技术和网络国家重点实验室,武汉430074 [3]烽火通信科技股份有限公司,武汉430205

出　　处：《光通信研究》2020年第3期23-29,共7页Study on Optical Communications

摘　　要：针对利用灵活光网络(FlexO)技术实现超100 Gbit/s业务传输过程中存在的时钟数据恢复问题,文章基于锁相环频率合成器,设计实现了一种新型的超100 Gbit/s光转换单元(OTU)帧结构OTUCn到n个100 Gbit/s帧结构OTU4业务数据转变的时钟数据恢复方案,可以在OTU4业务频点的一定频偏内,迅速恢复客户时钟,并实现对OTU4业务数据的重定时。仿真和实测表明,该方案能够有效满足FlexO中的时钟恢复需求,实时恢复的客户侧时钟抖动均<1×10^-6,并能确保多路重定时的OTU4业务数据持续稳定的向下一级传输。Aiming at the problem of clock data recovery during the transportation of beyond 100 Gbit/s services using Flexible Optical Network(FlexO)technology,this paper designs and implements a new clock data recovery solution based on phase-locked loop frequency synthesizer to transform OTUC n to n OTU4 service data.Within a certain frequency offset of the OTU4 service frequency point,the customer clock is quickly recovered,and the retiming of the OTU4 service data is realized.Simulation and actual measurement prove that this solution can effectively meet the clock recovery requirements in FlexO.The client-side clock jitter of real-time recovery is less than 1×10^-6,and it can ensure the continuous and stable transportation of OTU4 business data of multiple channels to the next stage.

关 键 词：灵活光网络 锁相环频率合成器 时钟数据恢复 

分 类 号：TN919.3[电子电信—通信与信息系统]