5G-TSN系统下的高精度时间同步

doi:10.12305/j.issn.1001-506X.2023.02.28

系统工程与电子技术 ›› 2023, Vol. 45 ›› Issue (2): 559-565.doi: 10.12305/j.issn.1001-506X.2023.02.28

• 通信与网络 • 上一篇

5G-TSN系统下的高精度时间同步

李晓辉¹^,*, 王先文¹, 樊韬¹, 张峰², 刘佳文¹, 万宏杰¹

1. 西安电子科技大学通信工程学院, 陕西西安 710071
2. 河南九域恩湃电力技术有限公司, 河南郑州 475000

收稿日期:2022-03-14 出版日期:2023-01-13 发布日期:2023-02-04
通讯作者: 李晓辉
作者简介:李晓辉(1972—), 女, 教授, 博士, 主要研究方向为宽带无线通信、无线资源管理
王先文(1995—), 男, 硕士研究生, 主要研究方向为5G物理层基带信号处理
樊韬(1994—), 男, 博士研究生, 主要研究方向为无线通信、毫米波信道估计
张峰(1983—), 男, 高级工程师, 主要研究方向为智能变电站继电保护、智能电网电磁暂态仿真、变电站配置文件校核
刘佳文(1995—), 男, 博士研究生, 主要研究方向为5G混合波束赋形、天线非理想特性诊断
万宏杰(1996—), 男, 硕士研究生, 主要研究方向为宽带无线通信、数字信号处理
基金资助:
国家重点研发计划(2018YFB1802004)

High-precision time synchronization of 5G-TSN system

Xiaohui LI¹^,*, Xianwen WANG¹, Tao FAN¹, Feng ZHANG², Jiawen LIU¹, Hongjie WAN¹

1. School of Teleommunications Engineering, Xidian University, Xi'an 710071, China
2. Henan Jiuyu Epri Electric Power Technology Corporation, Zhengzhou 475000, China

Received:2022-03-14 Online:2023-01-13 Published:2023-02-04
Contact: Xiaohui LI

摘要/Abstract

摘要：

第五代移动通信系统(the fifth generation communication system, 5G)与时间敏感网络(time sensitive networking, TSN)集成的5G-TSN系统需要实现高精度的时间同步。为此, 提出一种多波束联合的定时同步算法提高同步信号检测成功率, 实现高精度5G-TSN时间同步。首先, 根据多个波束间的时域关系计算波束间同步信号块的互相关的组合, 求出期望作为门限值; 然后, 利用超过门限值的若干波束进行互相关叠加峰值计算最大峰值对应的时域索引, 并完成主同步信号定时同步; 最后, 利用时频域结合地方式对传播时延进行估计以减少同步误差。仿真结果表明, 采用基于多波束联合的定时同步算法, 相比传统算法, 相关峰值更加显著, 能有效地提高定时同步成功率。

关键词: 时间敏感网络, 时间同步, 波束联合, 传播时延

Abstract:

It is necessary to achieve high-precision time synchronization in 5G-TSN systems integrated with the fifth generation communication system (5G) and time sensitive networking (TSN). Therefore, a multi-beam joint timing synchronization algorithm is proposed to improve the success rate of synchronization signal detection and achieve high-precision 5G-TSN time synchronization. Firstly, the combination of synchronization signal blocks cross-correlation between beams is calculated according to the time-domain relationship between multiple beams, and the expected value is obtained as the threshold value. Then, a number of beams exceeding the threshold are used to perform cross-correlation superposition peaks, and the time-domain index corresponding to the maximum peak value is calculated, so as to complete the timing synchronization of primary synchronization signal. Finally, the propagation delay is estimated in a combined time-frequency domain to reduce synchronization errors. The simulation results show that the use of the timing synchronization algorithm based on multi-beam joint has more significant correlation peaks than the traditional algorithm, which can effectively improve the success rate of timing synchronization.

Key words: time sensitive networks (TSN), time synchronization, beam joint, propagation delay

中图分类号:

TN929.5

李晓辉, 王先文, 樊韬, 张峰, 刘佳文, 万宏杰. 5G-TSN系统下的高精度时间同步[J]. 系统工程与电子技术, 2023, 45(2): 559-565.

Xiaohui LI, Xianwen WANG, Tao FAN, Feng ZHANG, Jiawen LIU, Hongjie WAN. High-precision time synchronization of 5G-TSN system[J]. Systems Engineering and Electronics, 2023, 45(2): 559-565.

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参数	数值
子载波间隔/kHz	15
采样率/MHz	61.44
SS burst set周期/ms	20
CP类型	常规CP
FFT点数	4 096
随机频偏/kHz	0~16
信道类型	TDL-A

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5G-TSN系统下的高精度时间同步

High-precision time synchronization of 5G-TSN system

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