Skip to Main content Skip to Navigation
Theses

Spécification du protocole MAC pour les réseaux IEEE 802.11e à différentiation de services sous contrainte de mobilité

Abstract : This thesis proposes a new approach relating to the packets scheduling algorithm, the cooperation scheme and the nodes' mobility for IEEE 802.11 wireless network family. Considering the QoS delivery process at the MAC level consists the main feature of the proposal research study. The analysis of the current mechanisms leads to keep the protocol EDCF as the basic model for our work platform. In order to overcome the weakness of the earlier 802.11 standard, a new model based on multi-scheduler algorithm, called HCF-T, is proposed. The achieved performances are summarized following several criteria: traffic control, throughput improving, collisions avoidance, and network load decreasing. Furthermore, in the way of getting better results according to the PHY layer, we presented and analyzed a model of cooperative diversity scheme. It included a couple of relaying protocols AAF and DAF supported by a set of combining techniques to backup the signal at the receiver. To support node's mobility within EDCF, we built-up a model of WLAN which able to track node motion and control the access as in real condition. In the case of overlapping APs ranges, we developed a Multi-coverage algorithm aiming to carry out the session associations. As a result, three levels (Low, Medium, and High) of node's speed are discerned. Finally, EDCF has been implemented on various static and dynamic scenarios. The performances, based on the main MAC-layer metrics, such as throughput, End-2-End delay, and jitter, have been classified and comprehensively evaluated
Document type :
Theses
Complete list of metadatas

Cited literature [106 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-00681041
Contributor : Abes Star :  Contact
Submitted on : Tuesday, March 20, 2012 - 4:03:52 PM
Last modification on : Wednesday, September 4, 2019 - 1:52:09 PM
Long-term archiving on: : Monday, November 26, 2012 - 11:40:37 AM

File

TH2011PEST1016_complete.pdf
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-00681041, version 1

Collections

Citation

Khaled Dridi. Spécification du protocole MAC pour les réseaux IEEE 802.11e à différentiation de services sous contrainte de mobilité. Autre [cs.OH]. Université Paris-Est, 2011. Français. ⟨NNT : 2011PEST1016⟩. ⟨tel-00681041⟩

Share

Metrics

Record views

1172

Files downloads

8036