Analysis of Frame out of Step Problem in Time-division Mobile Communication Network Caused by GPS Time Offset

Abstract

In this paper, a specific case analysis is carried out for the problem that the time-division mobile communication network frame is out of step and the network is strongly interfered. Through the field test data, it is analyzed that the various forms of time offset of GPS are one of the causes of such interference problems. Through the analysis of the frame structure synchronization mechanism, five types of out-of-step types, namely, Forward-out-of-step, backward-out-of-step, Time-varying forward-out-of-step, Time-varying backward -out-of-step and the integrated time-varying out-of-step are proposed, and the case and synchronization mechanism are analyzed separately. Finally, a solution is proposed to continuously improve the stability of the time-division mobile communication network and reduce the occurrence of strong interference inside the time-division mobile communication network including 5G