基于WR-PTP的亚纳秒时间同步技术研究与实现  

Research and implementation of sub nanosecond time synchronization technology based on WR-PTP

作　　者：朱望纯[1] 康博 李恩[2] 钟震林 ZHU Wangchun;KANG Bo;LI En;ZHONG Zhenlin(School of Electronic Engineering and Automation,Guilin University of Electronic Technology,Guilin Guangxi 541004,China;The 34th Research Institute of CETC,Guilin Guangxi 541004,China)

机构地区：[1]桂林电子科技大学电子工程与自动化学院,广西桂林541004 [2]中国电子科技集团公司第三十四研究所,广西桂林541004

出　　处：《光通信技术》2020年第12期6-10,共5页Optical Communication Technology

基　　金：广东省重点领域研发计划项目(2019B010119001)资助。

摘　　要：电信级地面授时主要采用IEEE 1588v2协议,该协议在4G阶段尚可达到要求,但不能满足5G通信中某些应用的需求。为了进一步提高精度,采用基于白兔精确时间协议(WR-PTP)的时间同步技术来实现亚纳秒级同步。深入研究WR-PTP技术特征后,基于WRPC-v4.2内核研制了具有长距离传输能力的WR-PTP时钟模块,通过校正传输链路的不对称性,在100 km远程点对点光纤链路进行实验,测得时间同步偏差为41.5 ps,时间同步精度为-9.5 ps。IEEE 1588v2 protocol is mainly used in carrier level ground time service,which can meet the requirements in 4G phase,but can not meet the requirements of some applications of 5G communication.In order to further improve the accuracy,this paper uses time synchronization technology based on white rabbit precision time protocol(WR-PTP)to achieve sub nanosecond synchronization.In this paper,after deeply studying the technical characteristics of WR-PTP,the WR-PTP clock module with long-distance transmission capability is developed based on WRPC-v4.2 kernel.By correcting the asymmetry of the transmission link,an experiment was carried out on a 100 km long-distance point-to-point optical fiber link.The measured time synchronization deviation was 41.5 ps and the time synchronization accuracy was-9.5 ps.

关 键 词：白兔精确时间协议 时间同步 亚纳秒 IEEE 1588v2协议 

分 类 号：TN929.1[电子电信—通信与信息系统]