畢業(yè)設(shè)計(論文)-基于內(nèi)容中心網(wǎng)絡(luò)開發(fā)平臺的文件分享精選

基于內(nèi)容中心網(wǎng)絡(luò)開發(fā)平臺的文件分享摘要當(dāng)前的網(wǎng)絡(luò)環(huán)境與網(wǎng)絡(luò)誕生之初時相比已經(jīng)發(fā)生變化，信息更多被用于分享和合作，而非僅僅從一地傳送至另一地，基于TCP/IP的現(xiàn)有互聯(lián)網(wǎng)已經(jīng)逐漸暴露出許多不適應(yīng)。在這樣的背景下，一種以“方便內(nèi)容的存取”為原則設(shè)計而成的新型網(wǎng)絡(luò)架構(gòu)體系——內(nèi)容中心網(wǎng)絡(luò)應(yīng)運而生。論文首先從分析當(dāng)前互聯(lián)網(wǎng)存在的弊端入手，總結(jié)出了幾點當(dāng)前互聯(lián)網(wǎng)所暴露出來的問題，并提出解決這些問題的一些方案，這其中主要包括兩種——“演進(jìn)型”和“革命型”，簡單分析之后指出“革命型”才是長久之計，進(jìn)而引出論文將要研究的重點——內(nèi)容中心網(wǎng)絡(luò)(CCN)。論文具體闡述了CCN的體系結(jié)構(gòu)、設(shè)計目標(biāo)和原則以及通信機制，并與當(dāng)前的TCP/IP網(wǎng)絡(luò)做了一個簡單的對比，指出CCN的優(yōu)勢所在，最后列舉了當(dāng)前CCN的幾個研究熱點。在做過理論上的研究之后，基于內(nèi)容中心網(wǎng)絡(luò)開發(fā)平臺CCNx進(jìn)行了一個探究性的文件下載實驗，具體實現(xiàn)的功能是客戶端能根據(jù)各服務(wù)節(jié)點的狀態(tài)信息智能選擇最優(yōu)下載節(jié)點進(jìn)行文件下載。本實驗主要是在CCN文件下載過程中增加一個選路的過程，目的是節(jié)省網(wǎng)絡(luò)帶寬，減少網(wǎng)絡(luò)擁堵，縮短請求者對服務(wù)節(jié)點的額外占用時間。應(yīng)用到實際中，當(dāng)要下載的文件很大，服務(wù)節(jié)點很多，鏈路結(jié)構(gòu)很復(fù)雜時，選路所帶來的好處會更加明顯。另外通過本次實驗我們也驗證了CCN路由器的緩存功能，緩存功能是CCN網(wǎng)絡(luò)架構(gòu)的一大優(yōu)勢所在。關(guān)鍵詞內(nèi)容中心網(wǎng)絡(luò)(CCN) CCNx文件下載FILE SHARINGBASED ON THE CONTENT-CENTRIC NETWORKDEVELOPMENT PLATFORMABSTRACTWhen compared to the beginning ,the current network environment has changed a lot. The information has been mainly used to share rather than merely transferred from one place to another.The current IP-based network has revealed many insuitable aspects. The traditional host-centric Internet can no longer meet people’s needs on the network size、function and performance.This paper starts from the analysis of the current Internet drawbacks and pointed out the problems exposed by Internet. Thus some programs which mainly include two kinds——“evolution” and “revolution” are forwarded to address these issues.After simple analysis ,the“revolution” is considered as the long-term solution. Then CCN, the focus of the study in this paper is forwarded. Firstly a brief introduction of the four kinds of CCN——NDN、DONA、PSIRP and Netinf is given including their basic design and overall architecture. Then the representative NDN is taken as an example for further research and discussion. The paper specially addresses the NDN architecture, design objectives and principles, as well as the communication mechanism and also make a simple comparison with the current TCP/IP network to point out the advantages of NDN.An inquryfile sharing experiment is carried out after the theoretical research. Specifically speakin

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