本文選題：自組網(wǎng) + 嵌入式系統(tǒng)　； 參考：《哈爾濱理工大學》2015年碩士論文

【摘要】：近年來，無線通信發(fā)展迅猛，目前市場上也存在很多無線視頻傳輸產(chǎn)品，但是同時能夠滿足高質(zhì)量、遠距離以及自組網(wǎng)功能的產(chǎn)品卻很少。為解決這一矛盾，急需開發(fā)出一種新型的視頻傳輸系統(tǒng)。本課題就是在這一背景下提出的，結(jié)合Ad-Hoc自組網(wǎng)技術(shù)與嵌入式系統(tǒng)技術(shù)設(shè)計一套Ad-Hoc網(wǎng)絡(luò)環(huán)境下基于嵌入式Linux平臺的視頻傳輸系統(tǒng)。 本文首先分析了Ad-Hoc網(wǎng)絡(luò)的特點及其關(guān)鍵技術(shù)，，分析了自組網(wǎng)技術(shù)的難點。其次，在深入研究和分析Ad-Hoc協(xié)議的基礎(chǔ)上，對AODV協(xié)議及嵌入式Linux系統(tǒng)的相關(guān)接口以及網(wǎng)絡(luò)結(jié)構(gòu)進行研究，提出了該系統(tǒng)網(wǎng)絡(luò)傳輸協(xié)議的詳細設(shè)計實現(xiàn)方案。再次，完成嵌入式Linux平臺的搭建，包括嵌入式Linux系統(tǒng)的移植、硬件平臺的建立，對幾種關(guān)鍵芯片的選擇做詳細分析并給出了性能參數(shù)。最后，提出在嵌入式Linux系統(tǒng)上視頻傳輸?shù)木唧w實現(xiàn)方案，設(shè)計完成基于Video4Linux的視頻采集模塊，并對視頻數(shù)據(jù)進行MPEG-4壓縮，完成視頻流的實時傳輸。并分析了在多線程環(huán)境下并發(fā)嵌入式服務(wù)器詳細設(shè)計思路。在AODV算法實現(xiàn)的基礎(chǔ)上，建立Ad-Hoc網(wǎng)絡(luò)測試環(huán)境，在此環(huán)境下測試了實時視頻數(shù)據(jù)的采集、傳輸和顯示。實驗結(jié)果表明：該系統(tǒng)能夠?qū)崿F(xiàn)自組織網(wǎng)絡(luò)的路由功能，并且網(wǎng)絡(luò)性能能夠滿足視頻通信的應(yīng)用要求。
[Abstract]:In recent years, wireless communication has developed rapidly. There are also many wireless video transmission products in the market, but few products can meet the needs of high quality, long distance and ad hoc network function at the same time. In order to solve this contradiction, it is urgent to develop a new video transmission system. Under this background, this paper designs a video transmission system based on embedded Linux platform in Ad-Hoc network environment, combining with Ad-Hoc technology and embedded system technology. In this paper, the characteristics and key technologies of Ad-Hoc network are analyzed, and the difficulties of ad hoc network technology are analyzed. Secondly, on the basis of deep research and analysis of Ad-Hoc protocol, the paper studies the interface and network structure of AODV protocol and embedded Linux system, and puts forward the detailed design and implementation scheme of the network transmission protocol of this system. Thirdly, the construction of embedded Linux platform is completed, including the transplantation of embedded Linux system, the establishment of hardware platform, the selection of several key chips and the performance parameters. At last, the paper proposes a specific implementation scheme of video transmission in embedded Linux system, designs and completes the video capture module based on Video4Linux, and compacts the video data with MPEG-4 to complete the real-time transmission of video stream. The detailed design idea of concurrent embedded server in multi-thread environment is analyzed. Based on the implementation of AODV algorithm, the Ad-Hoc network test environment is established, in which real-time video data acquisition, transmission and display are tested. The experimental results show that the system can realize the routing function of the ad hoc network, and the network performance can meet the requirements of video communication applications.
【學位授予單位】：哈爾濱理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TN919.8

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相關(guān)期刊論文 前1條

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