Data synchronization method and device and storage medium

The invention provides a data synchronization method and device and a storage medium. The method is applied to a main vehicle-mounted communication unit OCU, and the main OCU comprises m digital mobile communication network GSM-R modules. The method comprises the following steps: through the m GSM-R modules, sending a first message to the AN through the m links; wherein m is a positive integer greater than or equal to 2; respectively detecting link states of the m links according to the first message; wherein the link state comprises a normal state and an abnormal state; and if the link in theabnormal state exists, performing link reconstruction on the link in the abnormal state. According to the data synchronization method and device and the storage medium provided by the invention, thecommunication stability and the data transmission reliability can be improved. 本发明提供一种数据的同步方法、装置及存储介质，该方法应用于主车载通信设备OCU，所述主OCU包括m个数字移动通信网GSM-R模块，所述方法包括：通过m个GSM-R模块经过m条链路向AN发送第一消息；其中，m为大于或等于2的正整数；根据所述第一消息，分别检测所述m条链路的链路状态；所述链路状态包