下一代以内容为中心网络架构的探讨与研究

发布时间：2018-03-11 13:34

本文选题：NDN　切入点：CCN　出处：《北京邮电大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着互联网用户需求和网络规模的飞速增长,互联网已然成为整个社会的重要基础设施,其重要性不言而喻。如果说在互联网发展初期对网络安全性、网络服务质量等网络指标要求没有非常严格的话,那么在互联网已渗透到各个关键领域的今天,我们必须要求其提供的服务是高质量,高可靠,高安全性的。因此,很多学者致力于对未来网络的可能存在方式展开研究。作为未来网络的彻底“改革”派,NDN(Named Data Networking,命名数据网络)概念的提出无疑是对目前IP协议为核心的网络的颠覆。NDN针对现有IP网络的带宽、安全、服务质量、用户需求满足等方面的种种不足进行本质性改变——以内容为中心替代IP层,同时保留其细腰构架、路由转发分离等优势,成为目前未来网络研究的佼佼者。本文首先介绍了目前IP互联网的现状及其局限性,并介绍了几个不同的研究方向。其次针对NDN网络的架构,进行的详细阐述,包括节点类型,协议包类型,以及信息处理流程,并提出了其中的关键技术和研究热点。在此基础上,本文根据NDN默认的路由机制进行了相应的改进,首先是自适应式的路由机制,对网络中传输速度,以及传输时间,稳定性等方面都有较好的改进。而基于蚁群算法的路由机制在网络时延方面并没有一般蚁群算法中可能出现的收敛过早,拥塞等问题出现,很好地发挥了降低网络时延的优势。对网络的性能有了提高和改善。然后,对缓存机制的三个疑问进行了回答,并提出了一定的改善方案。实验结果表明,经过改进的随机替代策略对于网络性能方面的优势比较大,而且改善了网络的质量。
[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.
【学位授予单位】：北京邮电大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP393.02

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