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:2019,28(9):125-132
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利用SDN实现可编程无线局域网多径接入管理
(中国科学技术大学 计算机科学与技术学院, 合肥 230027)
Exploiting SDN for Multi-Path Access Management in Programmable WiFi Networks
(School of Computer Science and Technology, University of Science and Technology of China, Hefei 230027, China)
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投稿时间:2019-03-08    修订日期:2019-04-02
中文摘要: WiFi接入点(Access Point,AP)被广泛部署在学校、商场和机场等公共场所,满足用户随时随地的使用需求.然而,管理大规模的WiFi网络仍是一个亟待解决的难题,设备间的差异性造成难以在无线局域网中提供集中的接入管理.同时,由于各种新服务、新应用的推动,使得传统无线局域网中的网络资源利用率低及接入点负载不均衡的问题目益严重.因此,本文引入SDN思想,将协议无关转发(POF)技术应用到无线局域网中,提出一种深度可编程无线局域网架构,实现集中接入管理.同时,综合考虑信号强度(RSSI)、实时网络流量等因素,提出一种基于多路径TCP (MultiPath TCP,MPTCP)的无线AP接入管理机制,充分利用各AP的带宽资源,避免在拥塞的路径上继续传输数据,从而均衡底层AP负载.
中文关键词: SDN  WLAN  集中接入管理  POF  MPTCP
Abstract:WiFi Access Points (AP) are widely deployed in public places such as schools, shopping malls, and airports to meet the network access demands of users at any time from any location. However, managing a large-scale WiFi network is still a difficult problem to be solved, and the diversity of devices makes it difficult to provide centralized access management in WLAN. Meanwhile, due to the promotion of various new network services and applications, the problem of low utilization of network resources in traditional WLAN and unbalanced load of access points is becoming more serious. In this study, we adopt the idea of Software-Defined Network (SDN) and apply the Protocol Oblivious Forwarding (POF) technology in the WLAN network. We propose a deep programmable WLAN architecture to realize centralized access management. Moreover, considering the factors such as Received Signal Strength Indicator (RSSI) and real-time network traffic, we design a wireless AP access management mechanism based on MultiPath TCP (MPTCP). It can make full use of the bandwidth resources of each AP, avoid the continuous transmission of data on the congested path, and hence achieve the balance of work loads of substrate APs.
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基金项目:国家自然科学基金面上项目(61672486);国家科技重大专项子课题(2017ZX03001019-004)
引用文本:
朱格,李明政,刘童,童浩杰,田野.利用SDN实现可编程无线局域网多径接入管理.计算机系统应用,2019,28(9):125-132
ZHU Ge,LI Ming-Zheng,LIU Tong,TONG Hao-Jie,TIAN Ye.Exploiting SDN for Multi-Path Access Management in Programmable WiFi Networks.COMPUTER SYSTEMS APPLICATIONS,2019,28(9):125-132

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