面向配电网的5G R16版本空口授时误差预补偿策略研究

Research on Pre-compensation Strategy for Air Port Timing Error of 5G R16 Version in Distribution Network

随着5G与配电网业务融合越来越紧密,5G空口授时是解决配电网场景中卫星授时成本高、部分区域卫星信号质量差、光纤铺设昂贵等问题的一种手段。文章首先梳理配电网业务的高精度时间同步需求,分析5G空口授时原理与R16版本下的误差组成。然后采用外场测试的方法,得到终端在视距和非视距传输环境下5G空口授时的误差值。结合理论分析与测试结果,提出端到端授时误差预补偿策略,给出基站侧和终端侧的误差预补偿值。通过将基站侧误差、终端内部处理误差提前补偿,增强了5G授时的精度与稳定性,为配电网高精度时间同步业务及装置应用5G空口授时提供实际指导。

As the integration of 5G and distribution network business is getting closer and closer,5G air port timing is a means to solve the problems of high cost of satellite timing,poor quality of satellite signal in some areas and expensive fiber laying in distribution network scenario.In this paper,we firstly sort out the high-precision time synchronization requirements of distribution network services,analyze the principle of 5G air port timing and the error composition under R16 version.Then,we adopt the method of field test to obtain the error value of 5G air port timing under the line-of-sight and non-line-of-sight transmission environment.Combining the theoretical analysis and test results,an end-to-end timing error pre-compensation strategy is proposed to give the error pre-compensation values of the base station side and terminal side.By compensating the base station and satellite synchronization error and terminal internal processing error in advance,the accuracy and stability of 5G timing are enhanced,practical guidance is provided for the application of 5G air port timing in high-precision time synchronization services and devices in distribution networks.