A security platform startup method based on 2 by 2 out of 2 architecture

A secure platform, post-start technology, applied in the direction of program loading/starting, program control devices, etc., can solve problems such as complex processing logic, achieve high reliability and security, prevent misjudgment, and ensure the effect of timeliness reliability

CN109739568BActive Publication Date: 2021-12-21CASCO SIGNAL
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2021-12-21

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Abstract

The invention relates to a method for starting a security platform based on a 2 by 2 architecture. The method uses logic operation boards to exchange messages multiple times, confirms multiple times, and confirms version messages through a timeout waiting mechanism, and accurately judges other Existence status of logic operation boards; at the same time, adding preset clock messages to interactive messages ensures that all boards can complete the initialization and startup at the same time and enter the main task, and can realize single-system startup, dual-system startup at the same time, and dual-system one first and one later start up. Compared with the prior art, the present invention has the advantages of higher reliability and safety.
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Description

technical field

[0001] The present invention relates to a method for starting a secure platform, in particular to a method for starting a secure platform based on a 2-by-2 architecture. Background technique

[0002] The trackside safety platform is a general SIL4 level safety computer system, which can be used as a trackside safety device for subways and railways with upper-layer applications, such as area controllers, interlocks, train control, and trams. The trackside safety platform involved in the present invention adopts the safety architecture of 2 times 2 and 2 The board implements 2 out of 2, and the input and output messages must go through the 2 out of 2 comparison in the system and the consistency comparison between the main and standby machines before entering the next step. Compared with the trackside safety platform with a single system and single control The architecture improves redundancy and has higher reliability and security. When the main system fails ...

Examples

Embodiment Construction

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0028] figure 1 It is the relationship diagram of the logic operation board composition, initialization and main task of the trackside safety platform in the present invention. The platform includes the main and standby systems: A system (A machine), B system (B machine), each system contains two logic blocks Processing board, A series includes CPU1_A, CPU2_A; B series includes CPU1_B, CPU2_B. After each board is initialized, it enters the mai...