基于SDN无线网络带宽控制的研究与实现

发布时间：2018-10-25 18:04

【摘要】：随着无线网络技术的快速发展,WiFi上网方式逐渐成为人们日常上网的重要方式。但是随着接入用户的越来越多,现有的网络带宽资源越来越难以满足用户的需求,如何有效的利用网络带宽资源,更好的提高网络服务质量,成为当前网络质量服务的重要研究方向。传统的分布式网络在部署网络的新业务时,容易导致网络结构复杂化,异构化。与传统的分布式网络相比,软件定义网络(SDN)具备了更好的网络优势,它采用了集中的控制模式,数据转发与网络控制相分离,数据转发只负责网络的数据转发业务,业务部署将由控制层来处理,实现业务逻辑的编程化。本文主要研究的是基于SDN技术对无线网络的流量监测和带宽资源的控制管理,实现动态的带宽资源分配机制,有效的利用网络带宽资源,达到高效的带宽资源利用率,并且针对不同的用户需求,动态的改变网络业务,满足用户个性化的服务需求,本文主要完成了以下工作:本文首先分析了传统网络架构与软件定义网络架构的区别,提出了在无线网络领域引入软件定义技术的优势,并设计和实现基于OpenFlow功能的无线路由器,利用SDN网络的优势对网络带宽资源进行控制管理。其次针对整个系统设计的目标和需求,提出整个控制架构的设计方案以及各个功能模块需要实现的功能,最后利用支持OpenFlow功能的无线路由器搭建了一个小型化实验网络对网络流量监测和带宽控制进行测试,实验结果表明能够实现对网络资源的监测反馈,动态地控制网络资源的分配,提高资源利用率。
[Abstract]:With the rapid development of wireless network technology, WiFi has gradually become an important way for people to surf the Internet. However, with the increasing number of access users, the existing network bandwidth resources are becoming more and more difficult to meet the needs of users, how to effectively use the network bandwidth resources, better improve the quality of network service, It has become an important research direction of network quality service. When the traditional distributed network deploys the new services of the network, it is easy to lead to the complexity of the network structure and isomerization. Compared with the traditional distributed network, the software-defined network (SDN) has better network advantages. It adopts centralized control mode, data forwarding is separated from network control, and data forwarding is only responsible for the network data forwarding service. The service deployment will be handled by the control layer and the business logic will be programmed. This paper mainly studies the flow monitoring and bandwidth resource control management based on SDN technology, realizes the dynamic bandwidth resource allocation mechanism, effectively uses the network bandwidth resource, achieves the high efficiency bandwidth resource utilization. And according to different user needs, dynamic change of network services to meet the user's personalized service requirements, this paper mainly completed the following work: firstly, this paper analyzes the differences between traditional network architecture and software defined network architecture. This paper presents the advantages of software definition technology in wireless network, and designs and implements a wireless router based on OpenFlow function. It uses the advantage of SDN network to control and manage the network bandwidth resources. Secondly, aiming at the goal and demand of the whole system design, the design scheme of the whole control architecture and the function of each functional module are put forward. Finally, a miniaturized experimental network is set up to test the network traffic monitoring and bandwidth control using wireless router supporting OpenFlow function. The experimental results show that the monitoring feedback of network resources can be realized. Dynamically control the allocation of network resources and improve resource utilization.
【学位授予单位】：南京大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN92

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