The Next Generation Of Cab Radio System Design And Implementation Of Embedded Software

The next-generation locomotive radio,known as the next generation of locomotive integrated radio communication station(hereinafter referred to as NCIR),installed in the locomotive or EMU,is an important component of the railway traffic control terminal terminal for the driver to keep the car communication,NCIR like railway traffic dispatch Command of the ears,is the current railway traffic control command is one of the important means of protection.With the development of railway dispatching business,especially the development of high-speed railway,the operation department has made suggestions and opinions on improving the existing locomotive radio station,hoping to make a breakthrough in equipment reliability,functional expansibility and maintainability.In order to meet the demand,NCIR will enhance the equipment reliability,the enhancement equipment extension ability,enhances the maintainability and so on as the design goal,uses the new technology the development achievement,carries on the equipment new architecture design.This paper will be based on the NCIR new hardware architecture,from the perspective of software design and implementation,research mainly as follows:software system framework to buildThis paper studies the various design patterns and hierarchical guidelines of the protocol stack,and combines the new hardware architecture of NCIR to extract,classify and optimize the platform and tool modules in the technology requirements.It is highly reliable,scalable,The framework of the software system,focusing on the framework of the basic framework for a detailed discussion.basic communication module design and iplementationThe detailed design and implementation of the hierarchical protocol model,in-depth study of the CAN bus,UART,Ethernet characteristics,the overall design to show the characteristics of the speculative process to the common agreement with the stack layered guiding ideology,the more the more common,The more the lower the more personalized,and then on the voice analog-to-digital conversion and codecs,public protocol conversion in detail the design,through the basic communication module design can improve the flexibility of the module,reusability and scalability.design and implementation of redundant switching mechanismRedundant design is the most effective way to solve the single point of failure of the equipment,it is also the foundation that improves the reliability of the system greatly.The redundant design involves three modules,namely the redundant switchover of the bus,the redundancy backup and the data synchronization of the control unit,the key communication unit demote and switch over.maintenance module design and implementationThe maintenance module includes program update,data download and online monitoring.The maintenance of line database is mainly designed.The operation mechanism,production method,simulation checking,upgrade maintenance and maintenance of the circuit database are designed and implemented in detail.This paper studies and designs the key problems of NCIR,and realizes the NCIR's high reliability,expansibility and maintainability demonstration model,which will provide important guarantee for the rapid development of railway traffic control system.At the same time,this article's viewpoint,the train of thought,the research content believed that has the certain reference value to the railroad correspondence terminal industry designer or the subway light rail communication terminal and so on the other profession designer,or can play the role.