Abstract
Automatic fare collection system (AFCS) is a modern, automatic, networked toll collection system for rail transit ticket sales, collection, billing, charging, statistics, sorting, and management. To realize the subway transit networking operation, this paper designs the subway AFCS based on a distributed file system (DFS), namely, Gluster File System (GlusterFS). Firstly, the multiline center (MLC) in the subway AFCS is designed to analyze the status and current situation of distributed file processing in subway MLC system; secondly, the relevant technical theories are summarized, the Bayesian Network (BN) theoretical model and DFS are explored, and the principles of four DFS are comparatively analyzed; thirdly, the architecture and cluster mode of GlusterFS is expounded, and then based on GlusterFS, the architecture of subway AFCS is discussed. This paper presents several innovation points: first, the subway AFCS is designed based on GlusterFS by analyzing and aiming at the functional requirements, performance requirements, and safety requirements of the MLC subway system; second, the safety risk analysis (SRA) of AFCS is conducted from six security requirements, and a Web scanning system is designed to ensure the system data security. Finally, the design scheme is used to analyze the subway passenger flow and power consumption. The results demonstrate that the design scheme can competently adapt to three different application scenarios. Through comparison of two deployment modes of the Web scanning system, the data security Web scanning system can ensure the safe operation of the AFCS. Furthermore, the statistical analysis of subway passenger flow and power supply data shows that the proposed scheme can support the smooth operation of the subway system, which has significant practical value.
Highlights
As early as the 1970s, some foreign countries have already adopted the automatic fare collection system (AFCS) in urban rail transit (URT) [1]
In the subway multilines center (MLC) system, there are mainly four kinds of data files [7]: (1) data interface between MLC and subordinate systems, which is stipulated by the urban subway network specification and contains messages and data files, among which the transaction data files and MLC parameter files are usually transmitted over File Transfer Protocol (FTP); (2)
MLC writes the operating parameter files to the data volume mounted on the FTP server through distributed file system (DFS), and the station downloads the files through FTP
Summary
As early as the 1970s, some foreign countries have already adopted the automatic fare collection system (AFCS) in urban rail transit (URT) [1]. The FTP server is essentially a long-connected and stateful service based on Transmission Control Protocol (TCP), which is usually single [5]. New features, such as microservices, virtualization, and containerization require the infrastructure layer to provide the function of sharing data volumes and files [6]. The DFS-based subway security AFCS is constructed to ensure the security of system data, and the design scheme is applied to the concrete scenario. The designed MLC in AFCS cannot only meet the common functions of the subway system, such as ticket selling, checking, billing, charging, statistics, sorting, and management, and can analyze the safety risks of the subway system and meet the six major safety requirements of the subway system
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