Hybrid Admission Control Algorithm for IEEE 802.11e EDCA: Analysis
ICN '08 Proceedings of the Seventh International Conference on Networking
A Measurement-Assisted, Model-Based Admission Control Algorithm for IEEE 802.11e
ISPAN '08 Proceedings of the The International Symposium on Parallel Architectures, Algorithms, and Networks
On Sustained QoS Guarantees in Operated IEEE 802.11 Wireless LANs
IEEE Transactions on Parallel and Distributed Systems
GIIS'09 Proceedings of the Second international conference on Global Information Infrastructure Symposium
Effect of transmission opportunity limit on transmission time modeling in 802.11e
IPOM'07 Proceedings of the 7th IEEE international conference on IP operations and management
Admission control in the IEEE 802.11e WLANs based on analytical modelling and game theory
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Supporting QoS in IEEE 802.11e wireless LANs
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
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Supporting emergent voice/video applications in all wireless technologies is a requirement in the Next Generation Network (NGN) where Wireless Local Area Networks (WLANs) is a main component. For this type of applications, QoS needs to be fully maintained in order to assure user satisfaction. Actually, QoS control in 802.11e WLANs to support real time voice/video services remains an open problem. All the solutions that only aim to enhance the performance of the Enhanced Distributed Channel Access (EDCA) mechanism cannot resolve the performance degradation problem once the channel becomes saturated. Hence, an efficient admission control scheme in EDCA is the key to guarantee the QoS required by voice/video services in WLANs. In this paper, we propose a model-based admission control algorithm that is located within the QoS Access Point (QAP). An accurate analytical model is used to predict the QoS metrics that can be achieved once a new flow is introduced in the WLAN. Based on this prediction and on the QoS constraints of already admitted (active) flows as well as of the new flow, the QAP takes the appropriate decision for the new flow. The proposed admission control scheme is fully compatible with the legacy 802.11e EDCA MAC protocol. It is validated numerically and through simulations using several realistic usage scenarios.