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Experimental Study of a Network Access Server for a public WLAN access network
KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT. (CCSlab)
2002 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Wireless access networks have gained popularity due to the flexibility they allow the user, who is able to move away from his or her desk while still being able to access information. Among the different Wireless LAN standards, the most widespread, by far, is IEEE 802.11.

Public WLAN access networks are being set up in hotspots, i.e. areas expected to have high demand for bandwidth. Access to the Internet and to corporate networks is provided at these hotspots with limited coverage but high available bandwidth. Airports and hotels have often been the first targeted locations for these hotspots, but conference centres, cafes, and train stations follow. In the near future, any person who owns at least one access point and has a connection to the Internet can become a small operator and offer access to the Internet using these resources.

Existing solutions for such WLAN access networks lack support for security, flexible accounting, mobility, multiaccess, roaming and user-friendly login. The aim of this Master's Thesis was to study if it was possible to solve these problems and how to integrate all this new functionality into existing public WLAN access networks by building and evaluating a prototype of a public WLAN access network

System requirements were defined, currently available solutions analysed and a prototype was built. Most of the functionality of the prototype is placed in the Network Access Server, which is the main element providing security, mobility, and accounting.

Flexible accounting, improvements in security, an easy and fast way to login the user, a feedback module to provide information about the current session and integration of the RADIUS architecture with the Mobile IP distribution have all been implemented.

Place, publisher, year, edition, pages
2002. , 115 p.
Keyword [en]
National Category
Communication Systems
URN: urn:nbn:se:kth:diva-93215OAI: diva2:515395
Subject / course
2002-01-22, Seminar room "Castor", Forum, Isafjordsgatan 39, Kista, 10:30 (English)
Available from: 2012-04-18 Created: 2012-04-12 Last updated: 2013-09-09Bibliographically approved

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