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ST-LUSTRE: A Novel Spatio-Temporal Language Towards Safety-Critical Cyber-Physical Systems

Volume 13, Number 8, December 2017, pp. 1219-1232
DOI: 10.23940/ijpe.17.08.p5.12191232

Jing Liua, Junyang Wanga, Zhiwei Lia, Haiying Suna, Yuejun Wangb, Dehui Dua, Xiaohong Chena, Mingsong Chena

aNational Trustworthy Embedded Software Engineering Reseearch Centre, East China Normal University, Shanghai 200333, China
bShanghai Fuxin Intelligent Transportation Solutions Co.Ltd, Zhangjiang Hi-Tech Park, Shanghai 200120, China

(Submitted on October 11, 2017; Revised on November 9, 2017; Accepted on November 25, 2017)



Abstract:

Safety-Critical Cyber-Physical Systems (SCCPSs) are a special kind of Cyber-Physical Systems (CPSs) which highlight the importance of system correctness and safety. To apply automatic testing or model checking technique in CPSs, a model that fully captures the features is required to serve as input. So, a novel efficient spatio-temporal language and the analysis techniques are demanded to support both temporal and spatial expression and reasoning. In fact, a synchronous language, LUSTRE, is widely used in safety-critical systems development. However, LUSTRE lacks spatial constructors. Thus, it is difficult to express the behaviors related to spatial features in SCCPSs. In this paper, we propose a language named ST-LUSTRE to support the unified modeling of spatial and temporal properties of CPSs. We define the syntax and semantics of ST-LUSTRE. Its semantics is interpreted on the topological space and natural number which is based on time sets. We also specify typical SCCPSs properties in ST-LUSTRE. ST-LUSTRE is successfully applied to a communication based train control system of Shanghai Fuxin Intelligent Transportation Solutions CO.,Ltd. (FITSCO).

 

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