Data communication system and method of train operation control system

The invention belongs to the technical field of train data communication, and discloses a data communication system and method of a train operation control system. Collecting historical connection data of the wireless access points; constructing a connection tetrad set; training a joint deep reinforcement learning model by using the connected tetrad set; acquiring state data of the train at the current moment; constructing a state feature vector according to the state data of the train at the current moment; utilizing a strategy network to predict and select action data in real time according to the state feature vector; applying the real-time prediction selection action data to the train, and evaluating the value of the current selection action data by using a value network; presetting a strategy value threshold value; if the value, output by the value network, of the current moment is lower than the strategy value threshold value, the strategy network is triggered to predict the real-time selection action d