基于GNSS邻域相似性的5G基站纳秒级时间同步技术研究  

Research on nanosecond time synchronization technology for 5G base station based on GNSS neighborhood similarity

作　　者：刘文学[1,2] 陈诗军 葛建[1] 袁洪 龚翠玲[3] LIU Wenxue;CHEN Shijun;GE Jian;YUAN Hong;GONG Cuiling(Academy of Opto-Electronics,Chinese Academy of Sciences,Beijing 100094,China;School of Electronic,Electrical and Communication Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;ZTE Corporation,Shenzhen 518055,China)

机构地区：[1]中国科学院光电研究院,北京100094 [2]中国科学院大学电子电气与通信工程学院,北京100049 [3]中兴通讯股份有限公司,广东深圳518055

出　　处：《通信学报》2020年第1期180-190,共11页Journal on Communications

基　　金：北京市科委新一代信息通信技术专项基金资助项目（No.Z181100003218009）;中国科学院光电研究院创新基金资助项目（No.Y70B12A1BY）;国家高技术研究发展计划（“863”计划）基金资助项目（No.2015AA124101）;国家重大科技专项基金资助项目(No.2016ZX03001023)~~

摘　　要：针对3GPP制定的LTE-A/5G业务中的高精度定位需求,突破现有全球卫星导航系统(GNSS)接收机百纳秒定时精度,研究基于GNSS的5G基站纳秒级高精度时间同步技术。分析GNSS误差邻域相似性特点,结合5G基站时间同步需求特点,提出基于GNSS邻域相似性的5G基站纳秒级精度时间同步理论与接收机相关算法,并研究该时间同步方法在区域和广域条件下的具体特征。仿真和实测结果表明,与现有百纳秒级基站时间同步精度相比,该技术方法可以实现任意区域基站3 ns以内的超高精度时间同步,支持5G基站米级高精度定位等高级增量业务开展。For precision positioning requirements in the LTE-A/5 G service developed by the 3 GPP, the nanosecond precision time synchronization technology based on global navigation satellite system(GNSS) for 5 G base station was studied which broke through the current GNSS receiver’s hundred nanosecond timing accuracy. By analyzing the characteristics of neighborhood similarity of GNSS errors and combining the characteristics of time synchronization requirements of 5 G base stations, a nanosecond precision time synchronization theory and related receiver algorithms for 5 G base stations was proposed which based on the principle of neighborhood similarity of GNSS signals. The specific characteristics of the time synchronization technology under regional and wide-area conditions were studied. The simulation and experimental results show that compared with the current time synchronization accuracy within hundred nanosecond rang of base stations, the proposed method can achieve precision time synchronization within 3 ns between the regional base stations, and support 5 G base station meter-level precision location based service(LBS) and other advanced incremental services.

关 键 词：5G 定位服务 全球卫星导航系统 纳秒级 高精度时间同步 

分 类 号：TN915.1[电子电信—通信与信息系统]