Abstract: As an indispensable basic support network, 5G synchronization network urgently needs to be promoted in technology and industrial development as soon as possible. Based on the analysis of the time synchronization requirement of 5G system, the necessity of solving 5G system synchronization based on high precision time synchronization ground network is analyzed, and a general network model of high precision synchronization is proposed. The key technologies such as high precision source, high precision synchronization transmission and high precision synchronization monitoring are mainly studied.

Key words: 5G synchronization network, satellite common view, 1588v2 technology