IEEE Transactions on Parallel and Distributed Systems
Feedback-based control for providing real-time services with the 802.11e MAC
IEEE/ACM Transactions on Networking (TON)
IEEE 802.11e enhancement for voice service
IEEE Wireless Communications
Supporting QoS in IEEE 802.11e wireless LANs
IEEE Transactions on Wireless Communications
Evaluation of distributed admission control for the IEEE 802.11e EDCA
IEEE Communications Magazine
IEEE Communications Magazine
Saturation throughput analysis of IEEE 802.11e enhanced distributed coordination function
IEEE Journal on Selected Areas in Communications
Performance analysis of IEEE 802.11e contention-based channel access
IEEE Journal on Selected Areas in Communications
IEEE Network: The Magazine of Global Internetworking
Applications and challenges of the 802.11e EDCA mechanism: an experimental study
IEEE Network: The Magazine of Global Internetworking
OmniVoice: a mobile voice solution for small-scale enterprises
MobiHoc '11 Proceedings of the Twelfth ACM International Symposium on Mobile Ad Hoc Networking and Computing
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Real-time multimedia traffic requires some minimum delivery guarantees to be effectively transmitted over packet-switched networks. This is even more necessary when interactive sessions (e.g., Voice-over-IP applications) are involved. Effective and timely packet delivery is sometimes achieved by overdimensioning network capacity. However, this is not the most practical and economic solution. Instead, providing a specific service to different traffic types may achieve better results without wasting network resources. Quality of Service (QoS) be implemented at different layers of the protocol stack, but tight control at the link layer is essential when the physical medium is shared among a number of devices. Wireless LANs are a typical example of that. The IEEE 802.11e amendment enhances the original version of the WiFi standard with new QoS functionalities. It maintains backward compatibility with legacy hardware, and this may cause the priority scheme to be ineffective in those deployments where non-QoS enabled hardware is present. In this paper, we analyze some widespread commercial 802.11 products to check the effectiveness of the QoS mechanisms. We show that all hardware under examination fails in providing effective QoS guarantees when legacy stations are present.