摘要
物联网或下一代5G移动通信网络等新的应用场景需要更高的时间同步精度和高度可扩展的同步协议。白兔精确时间协议(white rabbit PTP,WR-PTP)是一个多协作的开放项目,在同步以太网(synchronization ethernet,SyncE)中,以亚纳秒精度将时间分配给下行链路的数千个节点。研究了WR-PTP技术特征后,基于WRPC(WR-PTP core)研制了一个紧凑型的、独立的WR-PTP双端口时钟模块,完成时间同步实验测试。最后,在光纤链路中,通过时间同步实验表明,点对点的时间同步偏差为232.8 ps,时间同步精度为42.3 ps,级联的时间同步偏差为-421.3 ps,时间同步精度为53.7 ps。
New application scenarios such as IoT or next-generation 5 G mobile communication networks require higher time synchronization accuracy and highly scalable synchronization protocols.White rabbit precision time protocol(WR-PTP)is a multi-cooperative open project that distributes time with sub-nanosecond precision to thousands of downlinks in synchronization ethernet(SyncE).node.In the article,after studying the technical characteristics of WR-PTP,a compact and independent WR-PTP dual-port clock module is developed based on WR-PTP core(WRPC)to complete the time synchronization experimental test.Finally,in the optical fiber link,the time synchronization experiment shows that the point-to-point time synchronization deviation is 232.8 ps,the time synchronization accuracy is 42.3 ps,the cascaded time synchronization deviation is-421.3 ps,and the time synchronization accuracy is 53.7 ps.
作者
朱望纯
张涛
Zhu Wangchun;Zhang Tao(School of Computer Science and Engineering,Guilin University of Electronic Technology,Guilin 541004,China)
出处
《国外电子测量技术》
北大核心
2022年第4期139-144,共6页
Foreign Electronic Measurement Technology
