Secure coding and railway signal security protocol (RSSP-II)-based interface realization method

A technology of secure coding and secure protocol, applied in the field of communication interface implementation

Active Publication Date: 2018-04-13
CASCO SIGNAL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the limitations of secure coding techniques, only the main logic part can be securely coded

Method used

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  • Secure coding and railway signal security protocol (RSSP-II)-based interface realization method
  • Secure coding and railway signal security protocol (RSSP-II)-based interface realization method
  • Secure coding and railway signal security protocol (RSSP-II)-based interface realization method

Examples

Experimental program
Comparison scheme
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Embodiment

[0054] Such as figure 1 As shown, each CPU runs the same program independently, including the securely coded main logic part and the RSSP2 protocol communication layer; two CPUs form dual channels, which exchange information through DPRAM; between the main logic part and the RSSP2 communication layer The receiving conversion module interface and the sending conversion module interface provided for the present invention;

[0055] Such as figure 2 As shown, the working flow chart of the receiving conversion module from the RSSP-II communication layer to the secure coding program of the present invention is described in detail as follows:

[0056] Step 101: Initialize the security code variable of the received message. Assuming that the receiving module variable is x, the corresponding security code variable is initialized as follows:

[0057] X H = 0

[0058] X L = 0

[0059] Step 102: Use the RSSP-II protocol to receive the message; specifically, the dual channel independently runs th...

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Abstract

The invention relates to a secure coding and railway signal security protocol (RSSP-II)-based interface realization method. The method comprises the steps of receiving information from an RSSP-II communication layer, then converting the received information into information comprising coding information, dual-channel verification information and random error detection information by a receiving conversion module, wherein the information is involved in program operation of secure coding; and generating sent information in a program of secure coding, adding dual-channel verification informationand dual-channel random error detection information to MAC information of the sent information through a sending conversion module, then framing the MAC information with high bit coding information ofthe sent information to be sent out. Compared with the prior art, the method provides a detection mechanism for random errors generated in a process from receiving the information by the RSSP2-II communication layer to using the information by the coding program, and provides a detection mechanism for random errors generated in a process from generating information by the coding program to calculating an information verification code by an RSSP-II protocol layer, thereby making the interface safer.

Description

Technical field [0001] The invention relates to a method for realizing a communication interface in the field of rail traffic signals, in particular to a method for realizing an interface based on safety coding and railway signal safety protocol RSSP-II. Background technique [0002] Interconnected urban rail transit signal system requires the use of the railway signal safety protocol RSSP-II for communication between the various subsystems (including on-board systems and trackside systems) in an open network environment, which meets the requirements of EN50159-2 It is required that the seven types of security communication risks (specifically, duplication, deletion, insertion, reordering, damage, camouflage, and delay) existing in the open network environment can be effectively protected. [0003] The functions of the rail transit signal system mainly include the automatic driving and automatic protection of trains. In order to achieve the SIL4 safety standard, its hardware archit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L29/06
CPCH04L1/0009H04L1/0047H04L1/0061H04L1/0091H04L63/12H04L69/06
Inventor 方兴张洁黄邢陈张磊蒋建金
Owner CASCO SIGNAL
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