邮电设计技术

时分复用（TDD）制式无线通信系统需要严格的时间同步，在北斗卫星导航系统规模应用之前，基站的时间同步一般采用GPS卫星授时方式。随着我国自行研制的北斗卫星导航系统建设完成，北斗系统强大的能力让基站授时有了更多的选择，也有了国产替代方案。基站授时主要采用2种方式，基于卫星的基站授时方式和基于1588v2的基站授时方式。经测试验证可知，无论采用卫星北斗授时方式，还是采用1588v2北斗授时方式，都可以满足TDD系统时间同步的要求，因此，现网基站授时采用国产替代方案是可行的。

Time division multiplexing(TDD)wireless communication systems require strict time synchronization. Before the large-scale application of the Beidou satellite navigation system,the time synchronization of base stations was generally achieved through GPS satellite timing. With the completion of China's self-developed Beidou satellite navigation system,the powerful capabilities of the Beidou system have provided more options for base station timing and domestic alternative solutions. There are two main methods for base station timing:satellite based timing and 1588v2 based timing. According to the testing verification,whether using the satellite Beidou timing method or the 1588v2 Beidou timing method,both can meet the time synchronization requirements of TDD systems. Therefore,it is feasible to adopt a domestic alternative solution for the timing of current network base stations.