An admission control algorithm for multi-hop 802.11e-based WLANs
Computer Communications
Admission control scheme based on priority access for wireless LANs
Computer Networks: The International Journal of Computer and Telecommunications Networking
GIIS'09 Proceedings of the Second international conference on Global Information Infrastructure Symposium
Cross-layer approach for supporting QoS in IEEE802.11 DCF wireless LANs
Proceedings of the 6th ACM workshop on QoS and security for wireless and mobile networks
CIT'11 Proceedings of the 5th WSEAS international conference on Communications and information technology
Proceedings of the 7th ACM symposium on QoS and security for wireless and mobile networks
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The draft IEEE 802.11e standard aims at providing quality of service (QoS) support in 802.11 wireless local area networks (WLANs). Enhanced distributed coordination function (EDCF), being the fundamental medium access control mechanism in IEEE 802.11e, can only provide service differentiation but offers no QoS guarantees. While service differentiation does not perform well under high traffic load conditions, call admission control (CAC) becomes necessary in order to provide and support the QoS of existing calls. In this paper, we first analyze the saturation throughput and mean access delay performance of differentiated service provided by EDCF. Specifically, we investigate the impact of transmission opportunity (TXOP) and wireless channel errors on the performance of the EDCF. Based on the results from this analysis, we propose a new CAC algorithm that provides the desired throughput and access delay performance. Simulated performance results demonstrate the effectiveness of the proposed CAC algorithm