Auteur / Autrice : | Mohammad Nassiri |
Direction : | Andrzej Duda, Martin Heusse |
Type : | Thèse de doctorat |
Discipline(s) : | Informatique |
Date : | Soutenance en 2008 |
Etablissement(s) : | Grenoble INPG |
Mots clés
Mots clés contrôlés
Résumé
Ln this thesis, we study the important performance problems that arise at the MAC layer in 802. 11 wireless networks when they are used in the context of ad hoc or multi-hop. We proposed severa 1 mechanisms to overcome these performance issues. First, we enhance performance of a single wireless cell byaccommodating severa 1 classes of services. Our mechanism is a prioritized access method that supports both proportional throughput allocation and absolute priority. Second, we propose an efficient localized way to solve the problem of blocked stations in large-scale wireless networks. Finally, we propose a more global approach that combines topology constrajnts and a MAC layer mechanism to improve the performance of wireless ad hoc or mesh networks in terms of throughput and fairness. We use simulation to evaluate our proposais and also compare them with sorne state-of-the-art solutions.