Maria Eugenia Berezin
PhD, December 2013
Thursday 19 December 2013
In this dissertation, we examine important aspects of infrastructure IEEE 802.11 Wireless Local Area Networks (WLANs) and identify issues that can affect their performance. Reviewing the state of the art, we observe that numerous research efforts have proposed diverse solutions with several limitations that impede their deployment in existing WLANs. Moreover, users have ever-increasing expectations of availability, reliability, instantaneous response and security from their wireless connections.
Motivated by these challenges, we design and implement novel but practical solutions that address open issues affecting the performance of IEEE 802.11 WLANs. We adopt an Access Point (AP)-based approach, which does not require any modification in the clients. We focus on the following aspects of WLANs: client mobility, channel management, and quality of service, and explore three different scenarios for the most common deployments: an enterprise, a city (urban area), and a personal residence (home). To provide a common basis for practical implementation of new 802.11 solutions, we present a Smart AP model, inspired by self-management techniques.
The main contributions of this thesis are: