The Research And Achieve Of TCN RTP

As the development of high speed and automotive of train , train communication network has become the key technology in train (especially high speed train)control system. Do the research of train communication network device independently has good at market foreground and reality meaning.TCN network is one of the train communication network standard, it divide train communication network into WTB (wire train bus) which can layout vehicle dynamic and MVB (multiple vehicle bus) which connect device fixed. TCN connect communication device that in the train , master control device can transmit control command to every vehicle through train communication network , the message in each vehicle also can transmit to master control device through train communication network , insure message transmit in the train freely.Now most of high aped train abroad has fixed communication network fully , TCN technology has mature . China's train network TCN recommended standards, but because of its late start, is still in the application of the accumulation phase. With the railway by leaps and bounds, EMU and the introduction of high-power locomotives and the exchange of digestion, the train communication network for the needs of increasingly urgent. Based on this subject carried out the train network—TCN real time protocol Research and implementation of the agreement.In this thesis, a comprehensive analysis and understanding of the IEC61375—1 "Train Communication Network" (Train Communication Network), the focus of analysis and comparison of a common communications network TCN stratification and hierarchical network based on the similarities and differences, understanding and clear the TCN network application layer, transport layer, network layer, data link layer network such as stratified by the function and the realization of the principle.Secondly, the hierarchical and modular network design method for the TCN RTP system level software allocation and module division, the system design programs. WTB Manager in the original hardware (Fujitsu 32-bit host processor MB91F362) and software (embedded real-time operating system,μC/OS-Ⅱand the link layer driver module) for RTP based on software system design and build. The paper is divided into the process of data link layer interface, the process of application layer data interface, data link layer interface information, message data network layer, transport layer message data, message data, such as application-layer interface design and the parts.Finally, according to the actual source of the system to make data and information network layer transport layer data test program and the existing hardware platform to complete the module' s functional testing, test results are given. Loop simulation results show that the basic design to meet the expected requirements for follow-up work and the basis of some reference.