5G-TSN系统下的高精度时间同步

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。

High-precision time synchronization of 5G-TSN system

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.