Adaptive transmission opportunity with admission control for IEEE 802.11e networks

The increase of IEEE 802.11’s bandwidth led to a deployment of many multimedia applications over wireless networks. Nevertheless, these applications impose stringent constraints in QoS. In this context, a lot of works have been proposed in order to enhance the QoS-capable IEEE 802.11e MAC protocol. However, they settle for maintaining only an inter-QoS differentiation between the traffic classes, and neglect the intra-Qos differentiation. In fact, the flows belonging to the same service class are assigned the same MAC parameters regardless of their data rate, which leads to throughput fairness rather than perceived QoS fairness. On the other hand, the proposed schemes exhibit performance degradation when the number of flows increases. In this paper, we propose a new MAC protocol based on the reservation of the wireless channel through the use of transmission Opportunity (TXOPlimit) parameter. Each traffic class monitors the MAC queue and computes at runtime the TXOPlimit’s value. ...

• Type: Conference
• Year: 2005
• Where: MSWIM
• Authors: Adlen Ksentini, Abdelhak Guéroui, Mohamed Naimi
• Keywords: Admission Control Mechanism, Data Rate, MAC Protocol, Modelling And Simulation, MSWIM 2005