Abstract: The trains in the railway section communicate with each other by track circuit or base station indirectly, which has too many nodes and low reliability, also brings safety risk. In order to realize direct communication of train-to-train and the need of railway collision avoidance system, the train-to-train direct communication scheme is proposed, the ultrashort wave band, the maximum communication distance between trains and the structure of transceiver are selected for railway application requirements, also the feasibility of this technology is described. The link of the direct train-to-train communication is analyzed, the budget model of path loss of station and section are given, the calculated results under different conditions of the receiver power also with simulation are illustrated. Analysis result shows that the proposed technology can be realized. The fading in communication link is discussed with the character of train running environment, the result shows that the multipath propagation and Doppler effect lead to serious signal fading.
train-to-train direct communication,