According to the ITU-T recently published communication synchronization technology standard proposal

looking at the efforts of telecom operators for the development of synchronous networks

analyzing representative new products from domestic and foreign manufacturers and research units

trying to explore the synchronization of communication synchronization networks and networks. The evolution trend is summarized as follows: in order to meet the new challenges such as 5G mobile communication

the time-frequency synchronization performance index of the communication network is obviously improved

especially the high-precision time synchronization has received more attention

and it is necessary to adopt a new technology to change the traditional synchronization mode. The development and application of new synchronization equipment and instrumentation

the new synchronization technology standards also highlight China’s leading role and in? uence in the international.