基于SDN的WLAN接入控制技术研究与设计

发布时间：2018-05-17 21:36

本文选题：SDN + WLAN　；参考：《电子科技大学》2017年硕士论文

【摘要】：移动互联网飞速发展,无线网络已成为人们通信和日常信息获取的主要方式。无线接入网络不仅要提供网络服务,也需要满足各种不同场景接入需求。无线网络用户数量的激增与各种网络管理定义模块的出现都预示着新一代无线网络将走向更深程度的自定义。软件定义网络(SDN,Software Defined Network)的集中控制以及可编程特性都是应现代网络的需求而生。同样,易于部署、灵活可控、便于管理成为新一代无线接入网络架构能否成功应用的重要考量条件。基于这些需求,首先,本文总结了目前SDN技术与WLAN结合的现状,说明SDN技术应用在无线网络中解决的问题及已有解决方案的优缺点。随后,提出了基于SDN思想的Biacn接入控制架构设计思路,通过在无线网络不同位置部署控制器代理软件与接入点代理软件,实现对接入点和无线用户的灵活配置管控。并且利用控制代理软件提供的API可以完成无线网络的灵活部署与深度自定义,实现不同接入需求。通过双边代理软件的配合,可以根据需求更改配置粒度与接入控制条件,提高了无线网络部署效率。文中详细介绍了Biacn架构各个模块的功能与架构通信协议ACAMP的设计,阐述了Biacn接入控制架构的创新点与优势。另外,本文给出了Biacn架构实现的具体方法,详细介绍了控制端代理软件与接入点代理软件的代码设计细节和实现流程。并对架构中实现的WLAN管控功能进行一一测试,给出测试结果分析,说明Biacn架构中双边代理机制对整体无线网络接入控制的影响。文章最后,基于Biacn提出了一种面向用户的接入控制机制,利用架构对WLAN的动态监控优势,保障其中部分用户得到的网络服务质量。Biacn架构因其自身可扩展、可编程等特性可以为无线网络开发管理者提供软件层面的封装调用,提高WLAN组网和管理的可控与灵活性,降低管理人员维护的难度与成本。Biacn架构将原本只允许静态配置的无线网络转化成可深度定义自由扩展的软件定义无线网络(SDWN),实现网络部署自动化与用户接入的自由控制。
[Abstract]:With the rapid development of mobile Internet, wireless network has become the main way for people to communicate and obtain daily information. Wireless access networks not only provide network services, but also meet the needs of different scenarios. The proliferation of wireless network users and the emergence of various network management definition modules indicate that a new generation of wireless networks will move towards a deeper level of customization. The centralized control and programmable features of SDNN software Defined network are designed to meet the needs of modern networks. Similarly, ease of deployment, flexibility and management are important considerations for successful application of the new generation wireless access network architecture. Based on these requirements, firstly, this paper summarizes the current situation of the combination of SDN technology and WLAN, and explains the problems solved by SDN technology in wireless network and the advantages and disadvantages of existing solutions. Then, the design idea of Biacn access control architecture based on SDN is put forward. Through deploying controller agent software and access point agent software in different locations of wireless network, the flexible configuration control of access point and wireless user is realized. And the API provided by the control agent software can accomplish the flexible deployment and depth customization of wireless network and realize different access requirements. Through the cooperation of bilateral agent software, the configuration granularity and access control conditions can be changed according to the demand, and the efficiency of wireless network deployment can be improved. In this paper, the function of each module of Biacn architecture and the design of ACAMP are introduced in detail, and the innovation points and advantages of Biacn access control architecture are expounded. In addition, this paper gives the implementation method of Biacn architecture, and introduces the code design details and implementation flow of the control side agent software and the access point agent software in detail. The WLAN control function implemented in the architecture is tested one by one, and the test results are analyzed to illustrate the influence of the bilateral agent mechanism in the Biacn architecture on the overall wireless network access control. Finally, this paper proposes a user-oriented access control mechanism based on Biacn, which can make use of the dynamic monitoring advantage of the architecture to ensure that some of the users get the network quality of service. Biacn architecture is extensible because of its own. Programmable features can provide software level encapsulation calls for wireless network development managers and improve the controllability and flexibility of WLAN networking and management. To reduce the difficulty and cost of management maintenance. Biacn architecture transforms the wireless network which was only allowed to be statically configured into a software-defined wireless network with deep definition and free extension to realize the automation of network deployment and the free control of user access.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN925.93

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