University of Twente Student Theses


On Access Network Identification and Characterization

Barbosa, Rafael Ramos Regis (2009) On Access Network Identification and Characterization.

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Abstract:The proliferation of portable computing devices, such as laptops, netbooks, PDAs and smart phones, increased the demand for wireless network connectivity. The deployment of IEEE 802.11 Wireless LANs (WLANs) appears as an attractive solution for providing network connectivity in enterprises and universities, and in public places like conference venues and airports. The use of 802.11 WLANs brings new challenges to network administrators. They need to understand the extent of wireless usage to properly allocate the networks resources, such as Access Points (APs). In this report we propose a novel approach for the identification of access network types from passive measurements performed in an aggregation point of the network backbone. Based on basic characteristics of Ethernet and 802.11 protocols, like transmission rates of the links and duplex capabilities of the medium, we show that it is possible to distinguish TCP ows that cross these types of networks. As a side effect, our method provides information on the transmission rate in which the protocols are operating in. We validate our findings using traces generated in a semi-controlled laboratory environment and "real-world" traces collected at our university campus network.
Item Type:Essay (Master)
Faculty:EEMCS: Electrical Engineering, Mathematics and Computer Science
Subject:54 computer science
Programme:Computer Science MSc (60300)
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