Safe message selection method and device in LEU (Line-Side Electronic Unit)

Abstract

The invention discloses a safe storage and selection method and device for messages in an LEU (Line-side Electronic Unit) and belongs to the field of data security. A safe selection method for the messages in the LEU comprises the following steps of: extracting a code bit value of each transponder corresponding to the LEU from received real-time security data; sequentially reading message information of each transponder from a safe storage device, and sequentially judging whether the messages meet requirements according to the code bit values; if the messages do not meet the requirements, continuously reading the next message and carrying out judgment; and if the messages meet the requirements, verifying the messages, and outputting the messages to the transponders after verification. According to the method and device disclosed by the invention, the corresponding messages can be selected from message data stored in the LEU by analyzing interlocked data interlocked and sent by a computer, and meanwhile, the validity and the security of the messages in a selection process can be guaranteed; and furthermore, the security of the messages stored in the LEU is improved, so that the message data stored in the LEU and the message data transmitted to active transponders are further guaranteed to be safe and reliable.

Description

technical field [0001] The invention relates to the field of data security, in particular to a method and device for message security selection in LEU. Background technique [0002] The ground electronic unit (Line-side Electronic Unit, referred to as LEU) is used as the ground equipment for the interface between the train control center and the active transponder, and is used to transmit variable information data to the active transponder to meet the requirements of the transponder's uplink data transmission. Yes, so a certain amount of transponder message data and other necessary configuration information need to be stored in the LEU. Since the balise message data is an important basis for the train control system to control the train, it is also necessary to require the message data stored in the ground electronic unit (LEU) and the message data transmitted to the active balise to be accurate. [0003] However, in the prior art, the existing transparent transmission type...

AI Technical Summary

Problems solved by technology

[0003] However, in the prior art, the existing transparent transmission type LEU receives the message data transmitted by the train control center and directly forwards it to the active transponder, but the LEU itself does not store the normally forwarded message data, only stores when the LEU The default message data to be sent when the communication with the train control center fails

In urban rail transit, the LEU is required to select the corresponding message pre-stored in the LEU from the interlocking data received from the computer interlocking including message index conditions, so the existing transparent transmission LEU cannot meet this requirement. Require

[0004] Moreover, the storage structure of message data in the existing LEU cannot solve the addressing error problem caused by the mixed line of the address line of the storage device, and the simple redundant storage cannot solve the problem of common cause failure.

[0005] In addition, in urban rail transit, since each subway line has multiple stations, and the balises and balise message data of different stations are different, the message data that needs to be stored in the LEU for each station is also Different, this makes engineers need to store messages at each station when installing LEU, and the workload is very heavy. In addition, when the LEU fails and needs to be replaced, it is also necessary to re-store the messages corresponding to the transponder of the station data, making the maintenance work cumbersome, error-prone, and potential safety hazards

Images