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Gestion dynamique des topologies sans fils

Abstract : The issue of quality of service in the IEEE 802.11 wireless LANs remains one of the delicate challenges to be overcome by the scientific community. In these networks, the study and evaluation of approaches made to support QoS whether through simulation, analytical models and actual measurements shows that these approaches are still insufficient to give real guarantees of quality of services to wireless users. Following the work done in CRAN which focused on load balancing in industrial Ethernet networks, we opted for a new load balancing approach in the context of the 802.11 Hotspots. The aim of this approach is to balance the load of access points to satisfy the needs in terms of quality of service for all wireless applications. These requirements are expressed in terms of availability, delay, bandwidth... We then defined an algorithm for load balancing that can dynamically establish optimal associations between users in a Hotspot and access points in service. A set of new exchanges between wireless stations, access points and load balancing server has been established. The operation of this protocol has been verified and simulated using SDL and MSC tools. To evaluate the performance of the new load balancing approach regarding the original access method of the standard, a set of OPNET simulation are performed. These OPNET simulations show that the new approach can improve a set of QoS parameters perceived by wireless users.
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https://tel.archives-ouvertes.fr/tel-00342847
Contributor : Nicolas Krommenacker <>
Submitted on : Friday, November 28, 2008 - 2:54:54 PM
Last modification on : Friday, October 23, 2020 - 8:38:03 AM
Long-term archiving on: : Monday, June 7, 2010 - 8:34:01 PM

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  • HAL Id : tel-00342847, version 1

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Issam Jabri. Gestion dynamique des topologies sans fils. Réseaux et télécommunications [cs.NI]. Université Henri Poincaré - Nancy I, 2008. Français. ⟨tel-00342847⟩

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