基于SDN架构的无线接入网络研究与设计

发布时间：2018-01-09 02:13

本文关键词：基于SDN架构的无线接入网络研究与设计　出处：《电子科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着互联网的快速发展,网络用户的数量增长迅猛,各种各样的网络应用也相继产生。其产生的海量数据对网络提出了新的要求,传统的网络只能静态地运行,各种各样的协议被同时部署在网络设备当中。网络的复杂性、低效能、封闭性变得越来越明显。SDN(Soft Defined Network)技术在这种大背景下应运而生。这种技术能够将网络的转发平面和控制层面更好地分离开来,集中地控制网络状态,并且能够提供灵活的软件编程接口供网络管理者动态地增加或删减网络应用或协议。在众多的网络构建方式中,由于无线设备使用便捷,无线网络用户的比重越来越大。这也为无线接入网络提出了新的挑战:如何管理众多的无线用户,如何提高无线资源的使用效率,以及如何灵活地更改某些接入设备上的应用等。为了解决这些问题,本文研究并设计了一种无线接入网络系统。这种无线接入网络系统基于SDN架构,将无线接入控制与无线数据转发进行了分离,统一了无线接入控制功能,最后提供了开放的软件编程接口,使得管理者能够对整个无线接入网络进行动态灵活地管理。本文提出了一种将SDN控制与转发分离思想运用到无线接入网络的策略。按照此策略,将无线接入网络从功能架构上分为三个层面,分别是应用层、中心控制层、基础设施层。这种方式与传统无线接入方式相比有很大的区别,它的优势体现在应用层能够利用中心控制层提供各类开放接口实时控制基础设施层的无线接入网络状态,影响整个无线接入网络的正常运作。这种方式改变了传统AP乃至瘦AP设备只能静态运行的弊端。中心控制层提供的接口能够灵活地改变区域性的无线接入点设备,而传统的基于瘦AP架构的无线接入网络却做不到这一点。利用中心控制层开放的API接口能够在应用层开发各类应用,满足多样化的接入需求。与瘦AP架构相比,本系统基于SDN思想管理者只需工作在应用层面,使用标准统一的开放编程接口透明地管理区域性的无线接入网络。这种方式无需逐一配置各个AP,大大减轻了管理者的负担。管理者无需了解基础设施层面内容,只需利用应用层面所提供的软件编程接口即可完成对整个无线接入网络功能的增删操作。开放的可编程接口彻底改变了无线接入网络的静态化状况,通过这种接口可以重构无线接入网络资源,适应网络应用的需要,所有的应用开发在应用层面开发,方便且易于拓展。
[Abstract]:With the rapid development of the Internet, the rapid growth in the number of Internet users, all sorts of network applications have been established. The massive amounts of data put forward new demands to the network, the traditional network can only static operation, a variety of protocols are also deployed in network equipment. The complexity of the network, low efficiency, closed become more and more obvious.SDN (Soft Defined Network) technology emerges in this background. This technique can be network forwarding plane and control plane better separated, centralized control network, and can provide flexible software programming interface for network administrators to dynamically add or delete network application or in many protocols. The way to build a network, the wireless device is easy to use, more and more wireless network users. It is also a wireless access network presents new challenges War: how many users of wireless management, how to improve the efficiency of the use of wireless resources, and how to flexibly change the application of certain access equipment and so on. In order to solve these problems, this paper studies and designs a wireless access network system. The wireless access network system based on SDN architecture, wireless access control and wireless data forwarding is separated, unified wireless access control function, finally provides a software programming interface open, so the administrator can dynamically and flexibly manage the whole wireless access network. This paper proposes a SDN control and forwarding separation is applied to the wireless access network strategy. According to this strategy, the wireless access network from the functional architecture is divided into three levels, which are application layer, control layer, infrastructure layer. This way with traditional wireless access methods have great The difference, it has the advantage to the wireless access network using central control layer to provide various types of open interface real-time control infrastructure layer in the application layer, the normal operation of the whole effect of wireless access network. It changes the drawbacks of traditional AP and thin AP device can only be running static. The wireless access point device control layer provides the center the interface can flexibly change the regional, but the traditional wireless access network architecture based on thin AP can not do this. The center control layer open API interface to the application layer in the development of various applications, meet the diverse access needs. Compared with the thin AP architecture, the system SDN managers need to work at the application level based on wireless access network open programming interface using the unified management of the transparent area. The method does not need one by one each AP configuration, greatly reduced The burden of managers. Managers need not know the infrastructure level, only the software programming interface you can use the application level provided by the completion of the entire wireless network access function deletions operation. Open programmable interface completely changed the static state of wireless access networks, wireless access can reconstruct the cyber source through this interface and meet the needs of network application, all application development in the application level of development, convenient and easy to expand.

【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN925.93

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