Decomposing Automatic Train Control Verification System with Projection

Xu, Jing Chun; Chen, Xiaohong; Zhou, Tao; Yuan, Zhengheng; Huang, Kezhen

doi:10.1109/apsec.2015.10

Cited by 2 publications

(1 citation statement)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is base unit of the track in ZC. Branch is an access that composed by all connected blocks at current state [9]. The blocks are indexed using a block coordinate, whilst the branches are indexed using a branch coordinate.…”

Section: Introductionmentioning

confidence: 99%

Simplifying the Formal Verification of Safety Requirements in Zone Controllers Through Problem Frames and Constraint-Based Projection

Yuan

Chen

Liu

et al. 2018

IEEE Trans. Intell. Transport. Syst.

Self Cite

View full text Add to dashboard Cite

Formal methods have been applied widely to verifying the safety requirements of Communication-Based Train Control (CBTC) systems, while the problem situations could be much simplified. In industrial practices of CBTC systems, however, huge complexity arises, which renders those methods nearly impossible to apply. In this paper, we aim to reduce the state space of formal verification problems in Zone Controller, a sub-system of a typical CBTC. We achieve the simplification goal by reducing the total number of device variables. To do this, two projection methods are proposed based on Problem Frames and constraints, respectively. The Problem Frames based method decomposes the system according to sub-properties through functional decomposition, whilst the constraints based projection method removes redundant variables. Our industrial case study demonstrates the feasibility though an evaluation, confirming that these two methods are effective in reducing the state spaces of complex verification problems in this application domain.

show abstract

Section: Introductionmentioning

confidence: 99%