| 摘要: |
| 当前WiFi园区网络存在移动通信范围有限、主机地址配置受限等问题.软定义移动组网的已有研究大多集中于实现无线接入点的可编程性，其在实际部署中需要使用专用的接入点设施.以单跳有设施网络为研究目标，提出了一种园区WiFi网下软定义移动通信方案，为移动主机访问本地资源提供免配置接入和移动通信支持.其中，网络设施选择OpenFlow网络，普通接入点直接连接OpenFlow交换机.控制器负责分发包含接入位置的流表项，为移动主机提供基于名称的路由转发，并主动调整通信流的返回路径.目前已经完成系统原型开发，进行了移动通信实验，测量和分析了不同配置下的网络可用带宽和切换时延.实验结果表明，该组网模式可以实现主机的移动通信，主机网络配置和OpenFlow交换机性能对切换时延影响较小. |
| 关键词: 软件定义网络 WiFi OpenFlow 移动通信 切换时延 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金（61379149)；江苏省自然科学基金（BK20140070) |
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| Design and Implementation of Software Defined Mobile Communication for Campus WiFi Networks |
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WU Jun-Qing, CHEN Ming, HU Chao, ZHANG Guo-Min
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School of Command Information System, PLA University of Science and Technology, Nanjing 210007, China
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| Abstract: |
| Some problems exist in current WiFi campus networks, such as limited range of mobile communication, limited host network configuration. Many approaches have been proposed to introduce programmability in wireless networks, and all these systems require special software or hardware in the access point, which raises the issues of practicality. Aiming at single-hop infrastructured network, a solution of software defined mobile communication is proposed for campus WiFi networks, in which mobile hosts can access with free configuration and communicate in high mobility. In this architecture, OpenFlow network is chosen as network infrasture and commercial access points connect to OpenFlow switch directly. The controller is responsible for downloading flowitems containing mobile location, providing mobiles with name-based routing and adjusting reverse path actively for all traffic. A prototype has been implemented and experiments are carried out about mobile communication, in which the performance is measured and analyzed under different configurations. Experimental results show that mobile hosts can achieve mobile communication and the handover delay is not influenced by network configuration for mobile hosts and performance of OpenFlow switch. |
| Key words: software-defined network WiFi OpenFlow mobile communication handover delay |
