基于SDN的分布式切换管理关键技术研究

发布时间：2018-03-16 20:30

本文选题：分布式移动性管理　切入点：软件定义网络　出处：《南京邮电大学》2017年硕士论文　论文类型：学位论文

【摘要】：在移动互联网的迅速发展下,移动智能终端迅猛增长,需要能够解决移动终端在移动过程中通信连续性问题的方案。目前,学术界已经提出了很多集中式和分布式的移动性管理,都存在三角路由、隧道机制开销大等问题。虽然利用SDN控制平面与数据平面分离的特点,可以解决一些移动性管理问题,但是在大规模网络中,SDN以单一集中式的方式进行控制器的部署,会造成控制平面整体性能的降低和移动终端在移动过程中切换时延和丢包个数的增加。因此本文的研究内容在于不让控制器成为网络的瓶颈,降低控制平面在终端切换时的开销。本文首先对现有移动性管理所存在的问题进行分析,提出一种基于SDN分层控制平面的切换管理方案,设计域内和域间移动性管理的切换过程。然后,对现有SDN控制平面技术进行研究,提出使用分层模式的控制平面代替传统的集中式的控制平面,并对开源控制器Ryu进行改造,编写链路发现模块、网络拓扑模块、路由管理模块、北向组件模块和具有移动性功能的终端感知模块、ARP代理模块、策略更新模块,使改造后的控制器可以支持SDN分层控制平面的移动性管理。最后,在Mininet网络仿真平台上,对分层控制平面性能进行实验验证,分别对域内和域间切换的移动性管理进行实验验证,并与其它移动性管理方案在性能上进行对比和分析。
[Abstract]:With the rapid development of the mobile Internet, the mobile intelligent terminal is growing rapidly, so it needs to be able to solve the problem of communication continuity in the mobile terminal. A lot of centralized and distributed mobility management has been proposed in academic circles, which has many problems such as triangle routing, high overhead of tunnel mechanism, etc. Although some mobility management problems can be solved by using the characteristics of separating SDN control plane from data plane. But in large-scale networks, the SDN deploys controllers in a single centralized manner. It will reduce the overall performance of the control plane and increase the handoff delay and the number of packets lost in the mobile terminal. Therefore, the research content of this paper is not to let the controller become the bottleneck of the network. Firstly, this paper analyzes the existing problems of mobility management, and proposes a handover management scheme based on SDN hierarchical control plane. The switching process of mobility management within and between domains is designed. Then, the existing SDN control plane technology is studied, and the hierarchical control plane is proposed to replace the traditional centralized control plane, and the open source controller Ryu is modified. Write link discovery module, network topology module, route management module, northward component module, terminal awareness module with mobile function, ARP agent module, policy update module, The improved controller can support the mobility management of the SDN hierarchical control plane. Finally, the performance of the layered control plane is experimentally verified on the Mininet network simulation platform. The mobility management of intra-domain and inter-domain handoff is tested and compared with other mobility management schemes.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP393.0

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