Solutions to Support Mobility in SDN-Based Dense Wireless Networks

Ngoc-Dung Dào, Han Zhang, H. Farmanbar, Xu Li
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Abstract

The software-defined networking (SDN) concept is an efficient solution to manage highly complex wired networks, such as large-scaled data centers and fixed Internet network. The basic idea of SDN is to separate the control and data forwarding functions of routers so that the traffic engineering (TE) optimization can be dynamically made by a central controller. However the application of SDN concept in dense wireless networks is not straightforward. Unlike wired networks, the channel capacity of wireless networks always changes, depending on the mobility of users, channel fading and interference. In dense wireless networks with mobile users, the impacts of varying channel capacity are more difficult to handle because of small cell size. In this paper, we propose SDN-based integrated solutions to support user mobility in dense wireless networks. Our solutions include traffic engineering, dynamic placement of virtual user gateway, and fountain coding. Our simulation results from a SDN-based simulator show that our solutions bring remarkable gains compared with conventional solutions.
支持基于sdn的密集无线网络移动性的解决方案
软件定义网络(SDN)是管理大型数据中心、固定互联网等高度复杂有线网络的有效解决方案。SDN的基本思想是将路由器的控制功能和数据转发功能分离开来,通过一个中央控制器动态地进行流量工程(TE)优化。然而,SDN概念在密集无线网络中的应用并不简单。与有线网络不同,无线网络的信道容量总是随着用户的移动性、信道衰落和干扰而变化。在具有移动用户的密集无线网络中,由于小区尺寸小,信道容量变化的影响更难以处理。在本文中,我们提出了基于sdn的集成解决方案,以支持密集无线网络中的用户移动性。我们的解决方案包括流量工程、虚拟用户网关的动态布局和喷泉编码。在基于sdn的模拟器上进行的仿真结果表明,与传统的解决方案相比,我们的解决方案具有显着的增益。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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