面向时隙光交换网络的纳秒级时间同步技术  

Nanosecond Time Synchronization Technology for Time-slot Optical Switching Networks

作　　者：丁蕊 党导航 郭元之 薛旭伟 郭秉礼[1] 黄善国[1] Ding Rui;Dang Daohang;Guo Yuanzhi;Xue Xuwei;Guo Bingli;Huang Shanguo(Beijing University of Posts and Telecommunica-tions,Beijing 100876,China)

机构地区：[1]北京邮电大学,北京100876

出　　处：《邮电设计技术》2024年第2期22-26,共5页Designing Techniques of Posts and Telecommunications

摘　　要：随着互联网和通信服务的飞速发展,数据中心组网架构的研究重心由电交换转向光交换。由于光交换网络进行时隙交换之前需要同步时钟信号,时间同步的精度和稳定性是提升光网络性能的重要参数。提出基于FPGA实现的时间同步方案,与现有方案相比,该方案在降低了同步复杂性的同时具有更高的精度和稳定性。测试结果表明时间同步后的偏移量不超过2.56 ns,在不同光纤长度、运行时长和环境温度下的时钟抖动为皮秒级。With the rapid development of Internet and communication services,the research focus of data center network architecture has shifted from electrical switching to optical switching.Due to the need to synchronize clock signals before time slot switch-ing in optical switching networks,the accuracy and stability of time synchronization are important parameters for improving the performance of optical networks.A time synchronization scheme based on FPGA is proposed.Compared with the existing schemes,it has higher precision and stability while reducing the complexity of synchronization.Test results show that the off-set after time synchronization does not exceed 2.56 ns,and the clock jitter at different fiber lengths,operating hours,and am-bient temperatures is in the picosecond range.

关 键 词：时间同步 光电混合 数据中心网络 

分 类 号：TN913[电子电信—通信与信息系统]