命名数据网络中标签分发协议的研究

发布时间：2018-12-20 10:31

【摘要】：随着互联网技术与应用的快速发展,基于TCP/IP协议的传统互联网面临着前所未有的挑战。信息中心网络(Information-Centric Networking,ICN)被普遍认为是未来互联网的范式,命名数据网络(Named Data Networking,NDN)是其中最具代表性并且被广泛研究的基础架构之一。目前,NDN中还存在很多挑战,数据面转发效率是其中的一个关键问题。本文在NDN中引入了名字标签交换(Name Label Switching,NLS)域,以提高数据面的转发效率。论文依托重庆市基础科学与前沿技术研究重点基金的支持,以NLS为研究背景,研究和设计NDN中的标签分发协议,即名字标签分发协议(Name Label Distributed Protocol,NLDP),通过NLDP动态建立标签交换路径,实现NLS域内带标签分组的转发。本文的主要工作如下:首先,在理论研究的基础上,论文仿真实现了NLS域。NLS域有两种节点:边缘节点和核心节点。边缘节点具有为网络分组添加和去除标签以及缓存的功能;核心节点的功能是实现标签交换转发分组。然后,论文提出了NLDP的总体设计方案。按功能来分,该方案主要分为十个子模块,即路由模块、定时器模块、编解码模块、发现模块、通知模块、通告模块、会话模块、数据转发模块、接口模块以及各种表项模块。数据转发模块实现了静态配置标签交换路径时的NLS域。最后,对NS-3软件模块进行扩展,仿真实现NLDP和NLS域,并开发Wireshark插件用于解析NLDP的各类消息。评估NLDP的性能,仿真对比NLS与NDN的性能。用Wireshark抓取NLDP消息,验证NLDP消息流程的正确性以及NLDP的稳定性,并比较NDN和NLS对兴趣包的处理时间。仿真结果表明NLS域中数据包的响应时间减少了约37%,NLSR对兴趣包的处理时间约是NDN的30%。
[Abstract]:With the rapid development of Internet technology and application, the traditional Internet based on TCP/IP protocol is facing unprecedented challenges. Information Center Network (Information-Centric Networking,ICN) is widely regarded as the paradigm of the future Internet, and named data Network (Named Data Networking,NDN) is one of the most representative and widely studied infrastructure. At present, there are still many challenges in NDN, and the efficiency of data surface forwarding is one of the key problems. In this paper, we introduce the name label exchange (Name Label Switching,NLS) field in NDN to improve the efficiency of data surface forwarding. Based on the support of Chongqing Foundation for basic Science and Frontier Technology Research, this paper studies and designs the label Distribution Protocol (Name Label Distributed Protocol,NLDP) in NDN with NLS as the research background. The label switching path is dynamically established by NLDP to realize the forwarding of tagged packets in NLS domain. The main work of this paper is as follows: firstly, on the basis of theoretical research, the paper simulates and implements the NLS domain. There are two kinds of nodes in the NLS domain: edge node and core node. The edge node has the function of adding and removing tags and caching for the network packet, and the core node's function is to implement label switching and forwarding packets. Then, the paper puts forward the overall design scheme of NLDP. According to the function, the scheme is divided into ten sub-modules, namely, routing module, timer module, codec module, discovery module, notification module, session module, data forwarding module, interface module and various table item modules. The data forwarding module implements the NLS domain when the label switch path is configured statically. Finally, the NS-3 software module is extended, the NLDP and NLS domain are simulated, and the Wireshark plug-in is developed to parse all kinds of NLDP messages. The performance of NLDP is evaluated and the performance of NLS and NDN is compared by simulation. The NLDP message is fetched by Wireshark to verify the correctness of NLDP message flow and the stability of NLDP, and the processing time of NDN and NLS to interest packet is compared. The simulation results show that the response time of the packet in the NLS domain is reduced by about 37% and the processing time of the interest packet is about 30% of that of the NDN.
【学位授予单位】：重庆邮电大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TP393.04

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