發(fā)布時間：2018-06-04 09:45

  本文選題：列車通信網(wǎng) + RTP協(xié)議��； 參考：《北京交通大學》2015年碩士論文

【摘要】：隨著鐵路信息技術的發(fā)展,我國已獨立自主開發(fā)了包含鐵路控制科學和信號處理等關鍵技術和設備,并且逐步與世界鐵路系統(tǒng)標準接軌。1998年,鐵道部正式將TCN標準列我國的鐵路列車通信網(wǎng)絡的標準。 本文依托北京交通大學與青島四方車輛研究所開展的企業(yè)橫向課題"UIC網(wǎng)關的設計與實現(xiàn)”,實現(xiàn)了多功能車輛總線MVB和絞線式列車總線WTB的實時協(xié)議(RTP協(xié)議)消息數(shù)據(jù)通信,并在原有協(xié)議的基礎上,增加了流量控制機制,保證服務質量QoS,進行的主要工作如下： (1)深入研究IEC61375-1標準,劃分各功能模塊。根據(jù)實時協(xié)議RTP在OSI參考模型中對應層的規(guī)定,抓住各個層的特點。為整個通信流程劃分模塊,設計相應的數(shù)據(jù)結構。在傳輸層實現(xiàn)的過程中,引入超時模塊,實現(xiàn)了單播和多播傳輸層狀態(tài)機制和狀態(tài)轉換,達到控制消息數(shù)據(jù)的目的。最后設計了打印模塊,方便調試和錯誤修改。 (2)明確了模塊之間的接口,根據(jù)通信流程,確定調用關系。自頂向下依次驗證程序各個模塊和接口函數(shù)。編寫測試樣例,集成各個模塊統(tǒng)一測試。設計用戶界面,方便操作。通過仿真實驗后,完成系統(tǒng)集成,實現(xiàn)開發(fā)板之間的真實通信,打印測試結果并分析。 (3)在RTP實時協(xié)議的基礎上,找出協(xié)議內關于流量控制的不足,引入改進的流量控制機制。測試中通過限制通信流速,達到分類處理數(shù)據(jù)包的目的。在列車通信網(wǎng)絡在保證服務質量QoS方面做出嘗試。
[Abstract]:With the development of railway information technology, China has independently developed key technologies and equipment including railway control science and signal processing, and has gradually been in line with the world railway system standards. The Ministry of Railways formally listed the TCN standard as the standard of the railway train communication network in our country. Based on the enterprise horizontal project "Design and implementation of UIC Gateway", which is carried out by Beijing Jiaotong University and Qingdao Sifang vehicle Research Institute, this paper realizes the message data communication of MVB and WTB. On the basis of the original protocol, the flow control mechanism is added to ensure QoS. The main work is as follows: 1) deeply study IEC61375-1 standard, divide each function module. According to the rules of the corresponding layer in the OSI reference model of real-time protocol RTP, the characteristics of each layer are grasped. The corresponding data structure is designed for the module of the whole communication flow. In the process of transport layer implementation, the timeout module is introduced to realize the state mechanism and state conversion of unicast and multicast transport layer, so as to control the message data. Finally, a print module is designed to facilitate debugging and error modification. The interface between modules is defined, and the call relation is determined according to the communication flow. The top-down verifies each module and interface function of the program in turn. Write test sample, integrate each module unified test. Design user interface, convenient operation. After the simulation experiment, the system integration is completed, the real communication between the development boards is realized, the test results are printed and analyzed. On the basis of RTP real-time protocol, this paper finds out the deficiency of flow control in the protocol, and introduces an improved flow control mechanism. In the test, the data packet is classified and processed by limiting the communication flow rate. In the train communication network to ensure the quality of service (QoS) to make an attempt.
【學位授予單位】：北京交通大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U270.382;TP393.05

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