本文選題：NDN　切入點：CCN　出處：《北京郵電大學》2014年碩士論文　論文類型：學位論文

【摘要】：隨著互聯網用戶需求和網絡規(guī)模的飛速增長,互聯網已然成為整個社會的重要基礎設施,其重要性不言而喻。如果說在互聯網發(fā)展初期對網絡安全性、網絡服務質量等網絡指標要求沒有非常嚴格的話,那么在互聯網已滲透到各個關鍵領域的今天,我們必須要求其提供的服務是高質量,高可靠,高安全性的。因此,很多學者致力于對未來網絡的可能存在方式展開研究。作為未來網絡的徹底“改革”派,NDN(Named Data Networking,命名數據網絡)概念的提出無疑是對目前IP協(xié)議為核心的網絡的顛覆。NDN針對現有IP網絡的帶寬、安全、服務質量、用戶需求滿足等方面的種種不足進行本質性改變——以內容為中心替代IP層,同時保留其細腰構架、路由轉發(fā)分離等優(yōu)勢,成為目前未來網絡研究的佼佼者。 本文首先介紹了目前IP互聯網的現狀及其局限性,并介紹了幾個不同的研究方向。其次針對NDN網絡的架構,進行的詳細闡述,包括節(jié)點類型,協(xié)議包類型,以及信息處理流程,并提出了其中的關鍵技術和研究熱點。 在此基礎上,本文根據NDN默認的路由機制進行了相應的改進,首先是自適應式的路由機制,對網絡中傳輸速度,以及傳輸時間,穩(wěn)定性等方面都有較好的改進。而基于蟻群算法的路由機制在網絡時延方面并沒有一般蟻群算法中可能出現的收斂過早,擁塞等問題出現,很好地發(fā)揮了降低網絡時延的優(yōu)勢。對網絡的性能有了提高和改善。然后,對緩存機制的三個疑問進行了回答,并提出了一定的改善方案。實驗結果表明,經過改進的隨機替代策略對于網絡性能方面的優(yōu)勢比較大,而且改善了網絡的質量。
[Abstract]:With the rapid growth of Internet user demand and network scale, the Internet has become an important infrastructure of the whole society, and its importance is self-evident. Network quality of service and other network indicators are not very strict, then in the Internet has penetrated into all the key areas today, we must require its services are high quality, high reliability, high security. Many scholars have devoted themselves to the study of the possible existence of the future network. As a radical "reform" of the future network, the concept of named Data networking is undoubtedly a subversion of the current IP protocol as the core of the network. Override. NDN for the bandwidth of the existing IP network, The shortcomings of security, quality of service, satisfaction of users' needs and so on are to change the nature of the IP layer by taking the content as the center, while retaining its advantages of fine waist structure and separation of routing and forwarding, so it has become a leader in network research in the future. This paper first introduces the current situation and limitations of IP Internet, and introduces several different research directions. Secondly, the architecture of NDN network is described in detail, including node type, protocol packet type, and so on. And the flow of information processing, and put forward the key technology and research focus. On this basis, this paper makes corresponding improvements according to the default routing mechanism of NDN. Firstly, the adaptive routing mechanism is used to improve the transmission speed and time in the network. However, the routing mechanism based on ant colony algorithm has no premature convergence and congestion problems in network delay. The advantages of reducing network delay are well brought into play. The performance of the network is improved and improved. Then, three questions about the cache mechanism are answered, and a certain improvement scheme is proposed. The experimental results show that, The improved random substitution strategy has great advantages in network performance and improves the quality of the network.
【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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本文編號：1598394