Research And Implementation Of Safe Communication Between On-board And Track-side For Train Operation Control System Based On 3-DES Algorithm

With the development of modern Communication Based Train Control System, Digital Wireless Communication System will be widely used as the platform between On-board and Track-side. As a specialized application of the integrated dedicated Digital Mobile Communication System for the development of railway, GSM-R is characterized by adapting to rail transport and it has an advantage of mature technology. In line with the communication signals of the development of the integration of technology, it will be a wider range of promotion and application. However, the control information and management information between On-board and Track-side, as a result of the traffic safety and efficiency, the safety of GSM-R communication mechanism is paid much attention, and it has become the key of current communication between On-board and Track-side research.In this paper, we research the safety mechanisms of Euroradio (GSM-R) in European Train Control System. On the basis of that, a safe encryption system for GSM-R is designed and implemented.(1)This paper is a summary of development of Communications Based Train Control and the application of GSM-R in Train Operation Control System; Through analyzing the safety of wireless communications between On-board and Track-side, it points out the potential safety threats and countermeasures, including end-to-end(safety layer)safety measures and Password-based authentication technology; Focused on analyzing the safety mechanisms of Euroradio, including the plane of Safe Functional Module,Service primitives,Service definition and Functions of the safety layer, it discusses the authentication technology and data encryption technology.(2)According to in-depth analysis of safety layer, it uses of data encryption technology to complete the certification process based on the process of Message Origin Authentication and Peer Entity Authentication. MAC is the process to ensure the integrity of transmission of information safety and authentication in safety protocol, and MAC used to improve the calculation of the DES algorithm, that is, 3-DES encryption algorithm. FPGA is characterized by speed,safe,flexible and so on, so we implemente encryption system based on FPGA. There are some development tools such as Modelsim,QuartusII for software and hardware system design and simulation. This paper puts forward high-speed computing methods to improve the circuit design in the end.Authentication,data encryption and other safety measures ensure the safety of an open Wireless Communication System, and they make it a safe transmission channel between On-board and Track-side in Train Operation Control System.