Design and Simulation of Spectrum Management Methods for Wireless Local Area Networks
Wireless communication has become an integral part of daily life which results in an increasing number of wireless LAN devices deployed both in business, - ucationalandresidentialenvironmentsandthusinincreasingmutualinterference betweenthesedevices.Inaddition,therequirementsforthetransmissionplatforms areincreasing:voice-over-IPorvideotelephonyrelyonquality-of-serviceguar- tees which have to be maintained even in case of concurrent access of multiple users. Thisworkdiscussespossiblesolutionsfortheabove-mentionedproblemsbased on research work which I did in two projects funded by the German Research Foundation (Deutsche Forschungsgemeinschaft, DFG): In CoCoNet, automated spectrummanagementbetweenneighbouringnetworkstoreducemutualinterf- encewasinvestigatedwhileinXLayer,thefocuswastheresourceallocationofa wireless LAN base station which serves a number of mobile terminals with data ?ows. IthankProf.CarmelitaGörgforgivingtheopportunitytoperformthisresearch work under her supervision, and to Prof. Bernhard Walke, Stefan Mangold and Guido Hiertz, Aachen University of Technology, for the cooperation in the Co- CoNet research project and for providing the WARP2 simulator which was used as a working basis in this analysis. Further thanks to Prof. Karl-Dirk Kammeyer, University of Bremen, who co-supervised the XLayer project and was also a - viewerofthiswork.Furthermore,IthankRonaldBöhnkeandAndreasTimm-Giel forthecooperationintheXLayerproject. I also thank the development community of Linux and various software tools, A inparticulartheT X/LT Xtypesettingsystem,whichwereusedtorunthesimu- E E lationsandeditthemanuscript. Finally,IwishtosaythankyoutomywifeIranganiforherendlesspatienceand mentalsupportduringtheyearsthatIworkedonthisresearchproject.