SDN+：基于SDN的未来无线网络系统架构和扩展

摘要

Wireless networks have been facing huge chal enges like traffic explosive growth,chaotic coverage,and severe interference in al these years. SDN,giving great flexibility to network by decoupling control plane and data plane,has received great con-cern. Many works have been done for introducing the SDN concept into wireless networks,and most of them mainly focus on abstracting wireless network to software definition. But it is stil far from clear how extending current SDN architecture into wireless networks,especial y on uniform control of wired and wireless network. It analyzes the potential chal enges when ex-tending SDN to control future wireless networks. Based on the above chal enges,architecture and extensions of SDN for fu-ture SDN plus have been proposed. An experimental platform for validating the architectural design has also been given at the end,which shows that SDN plus could run and al ocate wired paths and wireless resources jointly per flow.%近年来，无线网络面临着流量持续爆炸式增长、高密度混合覆盖以及严重干扰等挑战性的问题。软件定义网络（SDN）通过将控制层和数据层分离，给网络带来了极大的灵活性，受到了广泛的关注。目前已经有很多工作将SDN的概念引入到无线网络中，主要集中在对抽象的无线网络进行软件层面的定义。然而如何真正将目前的SDN架构应用在无线网络中，并对有线无线网络进行统一控制还远未涉及。分析了将当前SDN架构应用在无线网络中潜在的挑战，在此基础上，提出了基于SDN的未来无线网络控制架构（SDN+）。实验结果表明：SDN+可以同时对每个数据流的有线路径和无线资源进行统一动态分配。