本文關(guān)鍵詞： 信息中心網(wǎng)絡(luò) 網(wǎng)內(nèi)緩存 域內(nèi)協(xié)作內(nèi)容分級(jí)緩存 ICN部署　出處：《清華大學(xué)》2014年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：互聯(lián)網(wǎng)中內(nèi)容的快速增長(zhǎng)以及大量面向內(nèi)容的應(yīng)用的出現(xiàn)，使得現(xiàn)有互聯(lián)網(wǎng)端對(duì)端的通信模式已難以適應(yīng)大規(guī)模數(shù)據(jù)分發(fā)的要求。為此，，信息中心網(wǎng)絡(luò)(ICN)，一種全新的clean-slate的網(wǎng)絡(luò)體系結(jié)構(gòu)被提出。ICN采用以內(nèi)容為中心的端到網(wǎng)絡(luò)的通信模式，內(nèi)容被單獨(dú)命名，路由器根據(jù)內(nèi)容名字進(jìn)行路由和轉(zhuǎn)發(fā)，路由器可以對(duì)內(nèi)容進(jìn)行緩存以便再次被訪問(wèn)，這種緩存叫做網(wǎng)內(nèi)緩存。 網(wǎng)內(nèi)緩存是ICN中非常重要的問(wèn)題，緩存策略的好壞直接影響著網(wǎng)絡(luò)的傳輸性能。目前提出的一些緩存方案由于從單個(gè)路由器的角度出發(fā)，緩存冗余大，影響緩存性能。本文首先對(duì)信息中心網(wǎng)絡(luò)及網(wǎng)內(nèi)緩存的研究進(jìn)行了綜述，在此基礎(chǔ)上，基于域內(nèi)訪問(wèn)與域外訪問(wèn)性能的差別，從一個(gè)域的角度出發(fā)，將一個(gè)域看成一個(gè)大的緩存池，從而提出了域內(nèi)協(xié)作內(nèi)容分級(jí)的ICN緩存策略IDCC。IDCC通過(guò)基于入口流速的初始緩存概率來(lái)降低緩存冗余和緩存替換率，通過(guò)域內(nèi)通告和路由來(lái)提高緩存利用率，通過(guò)域內(nèi)協(xié)作來(lái)降低緩存冗余，并且通過(guò)基于年齡的緩存替換機(jī)制來(lái)保證流行內(nèi)容在緩存中存足夠長(zhǎng)的時(shí)間。實(shí)驗(yàn)表明，相比于典型的緩存方案CE和proCache，IDCC在引入較小的額外流量的情況下，能夠較大的提高緩存性能。 針對(duì)ICN與現(xiàn)有網(wǎng)絡(luò)的兼容性問(wèn)題以及部署的問(wèn)題，本文還設(shè)計(jì)和實(shí)現(xiàn)了能在現(xiàn)有網(wǎng)絡(luò)中部署的SIONA內(nèi)容分發(fā)系統(tǒng)，并對(duì)其可行性和正確性進(jìn)行了實(shí)驗(yàn)。結(jié)果表明，SIONA路由器能與現(xiàn)有網(wǎng)絡(luò)兼容，并實(shí)現(xiàn)基于內(nèi)容的緩存和路由，提高了網(wǎng)絡(luò)傳輸性能。
[Abstract]:The rapid growth of content in the Internet and the emergence of a large number of content-oriented applications make the existing end-to-end communication mode of the Internet difficult to meet the requirements of large-scale data distribution. ICN, a new network architecture of clean-slate, is proposed to use the content-centric end-to-network communication mode. The content is named separately, and the router routes and forwards it according to the content name. Routers can cache content to be accessed again, a cache called an intranet cache. Intra-network cache is a very important problem in ICN, and the quality of cache policy directly affects the transmission performance of the network. Some cache schemes proposed at present have large cache redundancy from the point of view of a single router. First of all, this paper summarizes the research of information center network and intra-network cache, and based on this, based on the difference between intra-domain access and extra-domain access performance, from the point of view of one domain, Considering a domain as a large cache pool, this paper proposes a ICN cache policy based on cooperative content hierarchy in the domain. IDCC.IDCC reduces cache redundancy and cache replacement rate by using the initial cache probability based on inlet velocity. Cache utilization is improved by intra-domain notification and routing, cache redundancy is reduced by intra-domain collaboration, and age-based cache replacement mechanisms are used to ensure that popular content is kept in the cache for long enough time. Compared with the typical cache schemes CE and proCachen IDCC can greatly improve the cache performance in the case of small additional traffic. Aiming at the compatibility problem between ICN and existing network and the problem of deployment, this paper also designs and implements a SIONA content distribution system which can be deployed in the existing network. The feasibility and correctness of the router are tested, and the results show that the Sona router is compatible with the existing network, and implements content-based caching and routing, and improves the network transmission performance.
【學(xué)位授予單位】：清華大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TP393.02;TP333

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 夏春梅;徐明偉;;信息中心網(wǎng)絡(luò)研究綜述[J];計(jì)算機(jī)科學(xué)與探索;2013年06期

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