Embedded Software Platform Used for Detection and Mitigation of a MAC Anomaly in IEEE 802.11n Networks | Science Publications

American Journal of Applied Sciences

Gunnar Bedicks Jr.¹  Vitor Chaves de Oliveira¹  Alexandre de Assis Mota¹  Argemiro Bevilacqua¹  Lia Toledo Moreira Mota¹ 

关键词: IEEE 802.11;    Network Management;    Embedded Linux;    Shell Programming;    MAC Anomaly;   

DOI  :  10.3844/ajassp.2015.902.916

学科分类：自然科学（综合）

来源: Science Publications

【 摘 要 】

IEEE 802.11 standard is largely used anywhere as a cheap wayto access internet, but the majority of devices used does not provide astandard way to manage them. Mobile stations competing for access point maycauses a general wireless network failure, known as the “MAC Anomaly”. It ispresented here an access point with modified firmware, that monitors wirelessconections´s quality and has a programmable capability allowing to do networkmanagement in a standardized manner, using SNMP for example. In this article,embedded Linux “OpenWRT” installed in a very cheap and reduced size hardwarewas used. By means of Bourne shell script programming, it is possible tocollect all important operating parameters and data of the access point. Fromthis, its possible to gain considerable control over it. IEEE 802.11 (Wi-Fi)access point devices are routers, while embedded Linux has routingcapabilities. Thus, it is easy to implement traffic policies by means of Bourneshell script programming. Traffic shapping is one of the acces point´scapabilities successfuly tested and demonstrated in this study. MAC anomalydetection in IEEE 802.11 networks can be easily implemented by means of scriptsas well. It was collected and plotted network throughput data, becomingpossible to observe MAC anomaly in visual charts. A matemathic model to applyon the collected data of network throughput is under study, aiming to identifythe anomaly through calculations. The object of the current study is to integrateeverything: Measurements of operation data (network throughput in Mbit/s),identification of the MAC anomaly and its immediate mitigation. The result wasthe conception of an integrated device to measure, identify and mitigate MACanomaly in a test field and therefore restore network throughput byrepresenting a gain of 42.5216%.

【 授权许可】

Unknown