本文關鍵詞： 信息中心網絡 網內緩存 域內協(xié)作內容分級緩存 ICN部署　出處：《清華大學》2014年碩士論文　論文類型：學位論文

【摘要】：互聯(lián)網中內容的快速增長以及大量面向內容的應用的出現(xiàn)，使得現(xiàn)有互聯(lián)網端對端的通信模式已難以適應大規(guī)模數(shù)據(jù)分發(fā)的要求。為此，，信息中心網絡(ICN)，一種全新的clean-slate的網絡體系結構被提出。ICN采用以內容為中心的端到網絡的通信模式，內容被單獨命名，路由器根據(jù)內容名字進行路由和轉發(fā)，路由器可以對內容進行緩存以便再次被訪問，這種緩存叫做網內緩存。 網內緩存是ICN中非常重要的問題，緩存策略的好壞直接影響著網絡的傳輸性能。目前提出的一些緩存方案由于從單個路由器的角度出發(fā)，緩存冗余大，影響緩存性能。本文首先對信息中心網絡及網內緩存的研究進行了綜述，在此基礎上，基于域內訪問與域外訪問性能的差別，從一個域的角度出發(fā)，將一個域看成一個大的緩存池，從而提出了域內協(xié)作內容分級的ICN緩存策略IDCC。IDCC通過基于入口流速的初始緩存概率來降低緩存冗余和緩存替換率，通過域內通告和路由來提高緩存利用率，通過域內協(xié)作來降低緩存冗余，并且通過基于年齡的緩存替換機制來保證流行內容在緩存中存足夠長的時間。實驗表明，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ICN與現(xiàn)有網絡的兼容性問題以及部署的問題，本文還設計和實現(xiàn)了能在現(xiàn)有網絡中部署的SIONA內容分發(fā)系統(tǒng)，并對其可行性和正確性進行了實驗。結果表明，SIONA路由器能與現(xiàn)有網絡兼容，并實現(xiàn)基于內容的緩存和路由，提高了網絡傳輸性能。
[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.
【學位授予單位】：清華大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TP393.02;TP333

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相關期刊論文 前1條

1 夏春梅;徐明偉;;信息中心網絡研究綜述[J];計算機科學與探索;2013年06期

本文編號：1521892