本文選題：內(nèi)容中心網(wǎng)絡 + 移動性��； 參考：《北京郵電大學》2014年碩士論文

【摘要】：如今,人們的生活已經(jīng)離不開互聯(lián)網(wǎng)了。但是隨著人類社會對因特網(wǎng)的利用程度不斷地加劇,傳統(tǒng)的互聯(lián)網(wǎng)架構(gòu)體系的弊端卻不斷地顯現(xiàn)出來。比如傳統(tǒng)的IP地址耗盡問題,網(wǎng)絡資源利用率問題,網(wǎng)絡安全問題等等。雖然IPv6、p2p、CDN等技術(shù)的出現(xiàn)一定程度上彌補了這些缺陷,但是仍不能從根本上解決這些問題。在這樣的環(huán)境下,內(nèi)容中心網(wǎng)絡誕生了。 在內(nèi)容中心網(wǎng)絡的架構(gòu)體系中,用戶關(guān)心的不再是到哪里可以獲得數(shù)據(jù),而只用關(guān)心所想要的是什么。也就是說內(nèi)容中心網(wǎng)絡建立起了一個真正以數(shù)據(jù)內(nèi)容為核心的網(wǎng)絡體系,取代了已經(jīng)統(tǒng)治了半個世紀的TCP/IP架構(gòu)體系,也即以IP地址為核心的網(wǎng)絡。在內(nèi)容中心網(wǎng)絡里,形成了一套以內(nèi)容的發(fā)布/訂閱式的模式,不僅可以實現(xiàn)網(wǎng)絡資源的高效利用,也能從根本上避免一些現(xiàn)有的安全隱患。 但是,內(nèi)容中心網(wǎng)絡只是一種新興的網(wǎng)絡架構(gòu)體系,仍然有很多地方需要進一步的科學研究。本文立足于此,首先分析了當前的互聯(lián)網(wǎng)形勢,以及存在的核心問題,指出了內(nèi)容中心網(wǎng)絡是一種發(fā)展趨勢。然后詳細介紹了內(nèi)容中心網(wǎng)絡的基本網(wǎng)絡架構(gòu),并從架構(gòu)中的一些關(guān)鍵元素中分析了其一些優(yōu)勢與挑戰(zhàn)。然后從內(nèi)容中心網(wǎng)絡需要實際解決的幾個關(guān)鍵技術(shù)點著手,本文從移動性方面做了一些分析,指出內(nèi)容中心網(wǎng)絡特別適合在無線自組織網(wǎng)絡中應用,接著從網(wǎng)絡的關(guān)鍵技術(shù)點,路由轉(zhuǎn)發(fā)機制和緩存策略入手,分析和比較了幾種轉(zhuǎn)發(fā)機制。同時也在緩存方面結(jié)合內(nèi)容中心網(wǎng)絡中基本的原理,設計了一種新的緩存策略。最后借助基于NS-3的ndnSIM仿真工具,對轉(zhuǎn)發(fā)和緩存算法進行了仿真和驗證。實驗結(jié)果表明,該算法有著良好的性能表現(xiàn)。
[Abstract]:Nowadays, people's lives have been inseparable from the Internet. However, with the increasing use of the Internet in human society, the drawbacks of the traditional Internet architecture are constantly emerging. For example, the traditional IP address exhaustion problem, network resource utilization problem, network security problem and so on. Although the emergence of IPv6 p2pCDN and other technologies to some extent make up for these defects, but still can not fundamentally solve these problems. In this environment, the content center network was born. In the architecture of content-centric network, users are not concerned with where to get data, but only with what they want. That is to say, the content center network has established a real network system with data content as the core, replacing the TCP / IP architecture that has ruled for half a century, that is, the network with IP address as the core. In the content-centric network, a set of publish / subscribe mode based on content is formed, which can not only realize the efficient use of network resources, but also avoid some existing security hidden dangers. However, the content-centric network is only a new network architecture, and there are still many places for further scientific research. Based on this, this paper first analyzes the current Internet situation and the existing core problems, and points out that the content-centric network is a trend of development. Then the basic network architecture of content-centric network is introduced in detail, and some advantages and challenges are analyzed from some key elements in the architecture. Then, starting from several key technology points that need to be solved in practice, this paper makes some analysis from the aspect of mobility, and points out that content center network is especially suitable for application in wireless ad hoc network, and then from the key technology point of network, The routing forwarding mechanism and cache strategy are analyzed and compared. At the same time, a new caching strategy is designed based on the basic principle of content-centric network. Finally, NS-3 based ndnSIM simulation tool is used to simulate and verify the forwarding and caching algorithms. Experimental results show that the algorithm has good performance.
【學位授予單位】：北京郵電大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TP393.02

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