Design Of Radio Block Center Simulation System Based On Modularization

Radio Block Center(RBC)is an important equipment of CTCS-3 Train Control System.It is a control system based on fault safety computer.According to line characteristics(such as slope,fixed speed limit),transportation conditions(train spacing)and other system conditions(such as track occupancy information,route status,etc.),the RBC will send information(MA)that speed distance monitoring needs to the vehicle and then transmit it to on-board equipment through GSM-R wireless communication system to ensure the safe operation of trains within its jurisdiction.With the rapid development of China’s high-speed rail,the construction of backbone lines has been basically completed,and the construction of intercity lines is being intensified.Every year,the reconstruction and upgrading of both new and the existing lines are huge.Therefore the test link plays a very important role in ensuring the safety of train operation.However,a large number of test tasks force the manufacturers to invest in hardware equipment,which costs a lot of money.Meanwhile,the real hardware equipment is timeconsuming and expensive in use and maintenance.Therefore,it is of great practical significance to research and develop simulation test system while maintaining a certain amount of real hardware equipment to improve test efficiency,reduce costs,and make sure that test work is no longer limited by the site environment.This paper mainly studies the function of wireless block center simulation system,which can replace the real equipment to achieve the purpose of saving cost and rapid deployment.Firstly,the status quo of wireless block center and simulation system both at home and abroad is analyzed,and then the functional requirements,performance requirements,equipment structure and interface mode of wireless block center system are studied as a whole.On this basis,the needs of simulation system of wireless block center are analyzed,based on which,the overall structure and module division of the simulation system are determined.The modules are divided into initialization module,interface display and operation module,communication protocol and interface module,RCM interface module,platform interface module,ISDN module,etc.Finally,according to the needs of the simulation system of the wireless block center,the test case is designed and the test environment is set up to test and verify,so as to ensure that the realization of the simulation system of the wireless block center meets the design requirements.Analysis of present situations reveals that most of the simulation equipment used in the signal test of railway are interface simulation,just trying to simulating the interface logic and are of no function to deal with the complicated logic of real equipment.In this paper,the modular software design method is adopted,and the core logic function of wireless block center is taken as an independent module,which can share the code with the core logic function of real wireless block center,and keep consistent with the core logic of wireless block center in function.The simulation system of wireless block center is implemented with C + + language,RSSP-Ⅱ railway safety communication protocol,Subset037 protocol,etc.When the research and development is finished,it can be applied to wireless block center system function test,line data test,equipment interface test and other links.The simulation system of wireless block center also has the prospect of application in the on-the-job training.