本文選題：異構網(wǎng)絡 + 3G點對點通信　； 參考：《天津大學》2014年碩士論文

【摘要】：數(shù)據(jù)傳輸在環(huán)境監(jiān)測和防災救災中承擔重要作用,遠程數(shù)據(jù)傳輸需要長距離通信網(wǎng)絡支持,并提供特殊條件下的應急通信保障,同時還需保障傳輸過程的可靠性和實時性。本文基于遠程數(shù)據(jù)傳輸問題,設計和實現(xiàn)了一種多鏈路嵌入式通信機,該通信機通過集成以太網(wǎng)、3G蜂窩通信和北斗短報文服務,提供一種可靠的、適應性強的遠程數(shù)據(jù)傳輸方法:在城市局部區(qū)域內(nèi)采用無線以太網(wǎng)進行數(shù)據(jù)傳輸;在3G網(wǎng)絡覆蓋的區(qū)域,采用3G技術進行遠程數(shù)據(jù)傳輸;在3G網(wǎng)路無法覆蓋的區(qū)域或3G通信基站被干擾和破壞的區(qū)域,采用北斗短報文通信進行數(shù)據(jù)傳輸。在研究過程中,由于在WCDMA和TD-SCDMA制式下,3G終端設備撥號上網(wǎng)獲得的IP地址是由GGSN(網(wǎng)關GPRS支持節(jié)點)分配的動態(tài)局域網(wǎng)地址,且國內(nèi)三大3G運營商采用三種不同的通信協(xié)議,因而無法實現(xiàn)3G設備間的點對點通信。針對該問題,本文通過建立一個數(shù)據(jù)中轉(zhuǎn)服務器進行存儲轉(zhuǎn)發(fā),為3G發(fā)送方和接收方提供實時與非實時兩種通信方式,實現(xiàn)了跨協(xié)議的3G設備間點對點通信;另外,針對北斗短報文通信的不可靠傳輸,本文提出一種基于確認反饋的丟包重發(fā)機制來提高北斗短報文傳輸?shù)目煽啃�。本研究進行了大量的通信實驗,實驗結(jié)果驗證了該嵌入式通信機設計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.
【學位授予單位】：天津大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN915.05

【參考文獻】

相關期刊論文 前10條

1 夏曉巍;;基于移動平臺的北斗應急通信系統(tǒng)[J];通信技術;2013年05期

2 黎明;時海勇;;基于北斗衛(wèi)星的大型海洋浮標通信機制研究[J];海洋技術;2012年01期

3 嚴安;徐灝;鄢博;鄭逸璇;;基于北斗導航系統(tǒng)的移動報警應急系統(tǒng)設計[J];空軍雷達學院學報;2011年03期

4 羅騰;白征東;過靜s，

本文編號：1997545