A kind of CRC checking system and method based on redundant coding system

Abstract

The invention relates to a CRC check system and method based on a redundant coding system for data verification when both communication parties transmit a CRC message. The check system comprises a configuration data preparation module, a signature data compensation value calculation module, a coding module and a decoding module, the configuration data preparation module and the signature data compensation value calculation module are respectively connected with the coding module and the decoding module, and the coding module is connected with the decoding module; and the configuration data preparation module is used for preparing data required for use during online calculation offline, and the signature data compensation value calculation module provides a signature compensation value calculation table of each variable for counteracting low-order redundant code information during CRC calculation. Compared with the prior art, the CRC check system and method provided by the invention have the advantages of high security, high fault detection rate and the like.

Description

technical field [0001] The invention relates to the field of train operation communication, in particular to a CRC checking system and method based on a redundant coding system. Background technique [0002] The automatic train control system ATC (ATC-Automatic Train Control) is composed of the automatic train protection system ATP (Automatic Train Protection), the automatic train monitoring system ATS (Automatic Train Supervision) and the automatic train operation system ATO (Automatic Train Operation). The speed, running interval and running direction are controlled to ensure the safe and efficient operation of the train. Most of these systems need to use safety redundant coding technology to improve the safety of the system when designing, so that the system can reach the SIL4 level (Safety Integrity Level). [0003] Although the redundant coding technology has various forms, the coding form and security principle are roughly the same. Each variable is composed of high a...

AI Technical Summary

Problems solved by technology

If only the CRC calculation is performed on the high bit, it will cause random failure or fault reflected in the low bit data that cannot be detected by the outside world

When receiving external information, if the low-order redundancy code is directly calculated based on the high-order data, the CRC error will not be reflected in the low-order redundancy code and cannot be detected by the current system

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