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High Performance SDN WLAN Architecture

Faculty of Informatics and Information Technologies, Slovak University of Technology in Bratislava, 842 16 Bratislava, Slovakia
Authors to whom correspondence should be addressed.
Sensors 2019, 19(8), 1880;
Received: 15 February 2019 / Revised: 3 April 2019 / Accepted: 12 April 2019 / Published: 19 April 2019
(This article belongs to the Special Issue Internet of Things and Machine-to-Machine Communication)
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Wireless Local Area Network (WLAN) infrastructure is a dominant technology for direct access to the Internet and for cellular mobile data traffic offloading to WLANs. Additionally, the enterprise infrastructure can be used to provide functionality for the Internet of Things and Machine to Machine scenarios. This work is focused on improvements of radio resources control scalability similar to mobile networks via handover between cells. We introduce an improved IEEE 802.11 architecture utilizing Software-Defined Networks (SDNs). The proposed architecture allows communications during device movements without losing a quality of service (QoS). The fast seamless handover with QoS enables efficient usage of radio resources in large networks. Our improvements consist of integrating wireless management to OpenFlow protocol, separating encryption and decryption from an access point. In parallel, this feature as a side effect unloads processing at the Access Points (APs). Finally, the functionality of architecture design and scalability was proven by Colored Petri Nets (CPNs). The second proof of our concept was performed on two scenarios. The first scenario was applied to a delay sensitive use case. The second scenario considers a network congestion in real world conditions. Client’s mobility was integrated into both scenarios. The design was developed to demonstrate SDN WLAN architecture efficiency. View Full-Text
Keywords: WiFi; SDN WLAN; WiFi handover; client mobility WiFi; SDN WLAN; WiFi handover; client mobility

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Košťál, K.; Bencel, R.; Ries, M.; Trúchly, P.; Kotuliak, I. High Performance SDN WLAN Architecture. Sensors 2019, 19, 1880.

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