A Dynamic Priority Assignment Technique for Streams with (m, k)-Firm Deadlines
IEEE Transactions on Computers
EQuB ¾ Ethernet Quality of Service using Black Bursts
LCN '98 Proceedings of the 23rd Annual IEEE Conference on Local Computer Networks
A priority MAC protocol to support real-time traffic in ad hoc networks
Wireless Networks
Distributed Fair Scheduling in a Wireless LAN
IEEE Transactions on Mobile Computing
Priority scheduling in wireless ad hoc networks
Wireless Networks
Saturated throughput analysis of IEEE 802.11e EDCA
Computer Networks: The International Journal of Computer and Telecommunications Networking
B-EDCA: A QoS mechanism for multimedia communications over heterogeneous 802.11/802.11e WLANs
Computer Communications
Design of MAC protocols with fast collision resolution for wireless local area networks
IEEE Transactions on Wireless Communications
Performance analysis of priority schemes for IEEE 802.11 and IEEE 802.11e wireless LANs
IEEE Transactions on Wireless Communications
Performance analysis for IEEE 802.11e EDCF service differentiation
IEEE Transactions on Wireless Communications
Controlled Channel Access Scheduling for Guaranteed QoS in 802.11e-Based WLANs
IEEE Transactions on Wireless Communications
Quality-of-service in ad hoc carrier sense multiple access wireless networks
IEEE Journal on Selected Areas in Communications
Performance analysis of IEEE 802.11e contention-based channel access
IEEE Journal on Selected Areas in Communications
Quality of service provisioning in 802.11e networks: challenges, approaches, and future directions
IEEE Network: The Magazine of Global Internetworking
Performance analysis and enhancements for IEEE 802.11e wireless networks
IEEE Network: The Magazine of Global Internetworking
IEEE Network: The Magazine of Global Internetworking
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The timing behavior of the EDCAmechanism defined in the IEEE 802.11e standard is analyzed. More specifically, the target of this paper is to evaluate the limitations of the highest priority level of the EDCA mechanism (voice category) when supporting real-time (RT) communication. By RT communication, we mean small-sized packets generated in periodic intervals that must be delivered before the end of the message stream period. Otherwise, the message is considered to be delayed and a deadline loss occurs. We have assessed the EDCA mechanism considering an open communication environment, where both RT and non-RT stations share the same frequency band. Furthermore, a realistic error-prone model channel was used to measure the impact of interferences against an error-free channel. We show that, for most part of the evaluated scenarios, when using the default parameters of the EDCA mechanism both the number of packet losses and the average packet delays forecast an unacceptable number of deadline losses. However, if adequate Contention Windows (CW) parameters are configured in the set of RT stations, it becomes possible to adequately handle RT traffic. As a conclusion of this paper, we present some potential future directions toward improved QoS in wireless networks.