SECURED RAILWAY COMMUNICATION METHOD IN CLOSED TRANSMISSION-BASED SYSTEMS

摘要

PURPOSE: A method for transmitting a train control signal in a closed transmission system is provided to transmit and receive a message in the closed transmission system by adding a time stamping field, a cyclic redundancy check field, and an identifier field to a basic transmission frame. CONSTITUTION: A source identifier field is generated in a transmitter application layer(S311). The source identifier field shows the data transmitter information of the basic transmission frame. The time stamping field is generated in the transmitter application layer(S321). The time stamping field represents the time information of the basic transmission frame. A cyclic redundancy check field is generated in the transmitter application layer using a cyclic binary code(S331). The completed basic transmission frame is transmitted to the receiver(S341). The cyclic redundancy check filed of the basic transmission frame is checked and verified in the receiver application layer. The time stamping field and the source identifier field of the basic transmission frame are checked in the receiver application layer(S361,S371).