發(fā)布時(shí)間：2018-06-08 22:53

  本文選題：異構(gòu)網(wǎng)絡(luò) + 3G點(diǎn)對(duì)點(diǎn)通信�。� 參考：《天津大學(xué)》2014年碩士論文

【摘要】：數(shù)據(jù)傳輸在環(huán)境監(jiān)測(cè)和防災(zāi)救災(zāi)中承擔(dān)重要作用,遠(yuǎn)程數(shù)據(jù)傳輸需要長(zhǎng)距離通信網(wǎng)絡(luò)支持,并提供特殊條件下的應(yīng)急通信保障,同時(shí)還需保障傳輸過(guò)程的可靠性和實(shí)時(shí)性。本文基于遠(yuǎn)程數(shù)據(jù)傳輸問(wèn)題,設(shè)計(jì)和實(shí)現(xiàn)了一種多鏈路嵌入式通信機(jī),該通信機(jī)通過(guò)集成以太網(wǎng)、3G蜂窩通信和北斗短報(bào)文服務(wù),提供一種可靠的、適應(yīng)性強(qiáng)的遠(yuǎn)程數(shù)據(jù)傳輸方法:在城市局部區(qū)域內(nèi)采用無(wú)線以太網(wǎng)進(jìn)行數(shù)據(jù)傳輸;在3G網(wǎng)絡(luò)覆蓋的區(qū)域,采用3G技術(shù)進(jìn)行遠(yuǎn)程數(shù)據(jù)傳輸;在3G網(wǎng)路無(wú)法覆蓋的區(qū)域或3G通信基站被干擾和破壞的區(qū)域,采用北斗短報(bào)文通信進(jìn)行數(shù)據(jù)傳輸。在研究過(guò)程中,由于在WCDMA和TD-SCDMA制式下,3G終端設(shè)備撥號(hào)上網(wǎng)獲得的IP地址是由GGSN(網(wǎng)關(guān)GPRS支持節(jié)點(diǎn))分配的動(dòng)態(tài)局域網(wǎng)地址,且國(guó)內(nèi)三大3G運(yùn)營(yíng)商采用三種不同的通信協(xié)議,因而無(wú)法實(shí)現(xiàn)3G設(shè)備間的點(diǎn)對(duì)點(diǎn)通信。針對(duì)該問(wèn)題,本文通過(guò)建立一個(gè)數(shù)據(jù)中轉(zhuǎn)服務(wù)器進(jìn)行存儲(chǔ)轉(zhuǎn)發(fā),為3G發(fā)送方和接收方提供實(shí)時(shí)與非實(shí)時(shí)兩種通信方式,實(shí)現(xiàn)了跨協(xié)議的3G設(shè)備間點(diǎn)對(duì)點(diǎn)通信;另外,針對(duì)北斗短報(bào)文通信的不可靠傳輸,本文提出一種基于確認(rèn)反饋的丟包重發(fā)機(jī)制來(lái)提高北斗短報(bào)文傳輸?shù)目煽啃浴１狙芯窟M(jìn)行了大量的通信實(shí)驗(yàn),實(shí)驗(yàn)結(jié)果驗(yàn)證了該嵌入式通信機(jī)設(shè)計(jì)的合理性以及傳輸數(shù)據(jù)的可靠性。
[Abstract]:Data transmission plays an important role in environmental monitoring and disaster prevention and relief. Remote data transmission needs the support of long distance communication network, and provides emergency communication support under special conditions. At the same time, it also needs to ensure the reliability and real-time of the transmission process. Based on the problem of remote data transmission, a multi-link embedded communication machine is designed and implemented in this paper. The communication machine provides a reliable method by integrating Ethernet 3G cellular communication and Beidou short message service. The method of remote data transmission with strong adaptability is as follows: wireless Ethernet is used for data transmission in the local area of the city, and 3G technology is used for remote data transmission in the area covered by 3G network. Beidou short message communication is used for data transmission in areas that can not be covered by 3G network or where 3G communication base stations are interfered and destroyed. In the research process, because the IP address obtained by the 3G terminal equipment dialing in WCDMA and TD-SCDMA system is the dynamic LAN address assigned by GGSN( Gateway GPRS support Node), and three kinds of different communication protocols are adopted by the three 3G operators in our country. Therefore, the point-to-point communication between 3G devices can not be realized. To solve this problem, this paper establishes a data transfer server to store and forward, provides real-time and non-real-time communication for 3G sender and receiver, and realizes point-to-point communication between 3G devices across protocols. Aiming at the unreliable transmission of Beidou short message communication, this paper proposes a packet loss retransmission mechanism based on confirmation feedback to improve the reliability of Beidou short message transmission. In this paper, a large number of communication experiments have been carried out, and the results show that the design of the embedded communication machine is reasonable and the reliability of the data transmission is verified.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN915.05

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本文編號(hào)：1997545