基于信息备份技术提升城市轨道交通数据单向传输可靠性的设计方法
许子恒1李王睿2张立东3张菁博3
A Design Method for Improving the Reliability of Urban Rail Transit One-way Data Transmission Based on Information Backup Technology
XU Ziheng1LI Wangrui2ZHANG Lidong3ZHANG Jingbo3
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作者信息:1.上海应用技术大学轨道交通学院，201418，上海
2.华东师范大学软件工程学院，200241，上海
3.上海申通地铁集团有限公司技术中心，200233，上海
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Affiliation:1.School of Rail Transit, Shanghai Institute of Technology, 201418, Shanghai, China
2.School of Software Engineering, East China Normal University, 200241, Shanghai, China
3.Technology Center of Shanghai Shentong Metro Group Co., Ltd., 200233, Shanghai, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2024.09.040
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中图分类号/CLCN:U231.7
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栏目/Col:研究报告
摘要:
［目的］为了应对城市轨道交通系统各个子系统间复杂接入带来的潜在安全威胁，中国城市轨道交通协会提出安全生产网和外部服务网间应实施物理安全隔离。既有传输方式下，数据单向传输过程中经常发生丢包、误码等问题，需要寻求新的方法，以提高城市轨道交通数据单向传输的可靠性。［方法］阐述了单向安全隔离系统的传输原理及存在问题，以及单向安全网关内的代理、会话配置的情况。分析了传输异常3种类型（代理次序混乱、会话次序混乱及传输超时）的判断方式。提出了基于信息备份的数据传输方法，设定了备份信息的首部格式，制定了基于信息备份技术的数据传输方法检查传输异常的技术流程，并对该方法进行了试验验证。［结果及结论］该方法能够有效解决城市轨道交通数据单向传输可靠性低的问题。
Abstracts:
［Objective］ In order to deal with the potential security threats caused by the complex connections between various subsystems in urban rail transit system, China Urban Rail Transit Association proposes that physical security isolation should be implemented between the safety production network and the external service network. Under the existing transmission method, problems such as packet loss and bit error often occur during one-way data transmission, and new methods need to be sought to improve the reliability of one-way data transmission in urban rail transit. ［Method］ The transmission principle and existing problems of the one-way security isolation system, as well as the proxy and session configuration in the one-way security gateway are described. The judgment methods of three types of transmission anomalies (proxy order disorder, session order confusion and transmission timeout) are analyzed. A data transmission method based on information backup is proposed, and the header format of backup information is built. The technical process of checking transmission anomalies by the data transmission method based on information backup technology is formulated, which is verified by experiments. ［Result & Conclusion］ This method can effectively solve the problem of low reliability of one-way data transmission of urban rail transit.
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