Distributed fair scheduling in a wireless LAN
MobiCom '00 Proceedings of the 6th annual international conference on Mobile computing and networking
Adaptive service differentiation for QoS provisioning in IEEE 802.11 wireless ad hoc networks
PE-WASUN '04 Proceedings of the 1st ACM international workshop on Performance evaluation of wireless ad hoc, sensor, and ubiquitous networks
IEEE Communications Magazine
CSMA/CA performance under high traffic conditions: throughput and delay analysis
Computer Communications
Quality-of-service in ad hoc carrier sense multiple access wireless networks
IEEE Journal on Selected Areas in Communications
Performance analysis of the IEEE 802.11 distributed coordination function
IEEE Journal on Selected Areas in Communications
Supporting service differentiation in wireless packet networks using distributed control
IEEE Journal on Selected Areas in Communications
IEEE Network: The Magazine of Global Internetworking
Estimating maximum and minimum delays for wireless discrete networked control systems
WTS'09 Proceedings of the 2009 conference on Wireless Telecommunications Symposium
An adaptive resource control mechanism in multi-hop ad-hoc networks
WWIC'11 Proceedings of the 9th IFIP TC 6 international conference on Wired/wireless internet communications
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The Enhanced Coordination Channel Access (EDCA) mechanism is a 802.11e WG's initiative to provide Quality of Service (QoS) guarantees in 802.11-based wireless networks. Although EDCA introduces new mechanisms for differentiated medium access, it falls short in ensuring (i) intra-class QoS guarantees since flows belonging to the same service class (AC) are assigned the same MAC parameters regardless of their respective bit rate, which leads to throughput fairness rather than perceived QoS fairness, and (ii) sustained QoS guarantees by developing some sort of admission control mechanism to protect QoS of flows being served. In this paper, we propose a new MAC protocol featuring a dynamic channel reservation by using dynamic TXOPlimit parameter assignment along with a fully distributed admission control algorithm. By monitoring the dynamics MAC's AC queues, each AC figures out during runtime the TXOPlimit's value that best accommodates the application's data rate. TXOPlimit values are determined based on instantaneous network availability modelling taking into account key factors (e.g., contention level, network load, etc.) that influence flows' QoS performances. We generalize this model so that each AC active in the network may a priori assess the achievable QoS. This later model is used to design a fully-distributed admission control algorithm that regulates the network load to protect the already admitted flows from new entering flows. Simulation results show that compared to both EDCA and AEDCF (Adaptive EDCF), our protocol excels, in terms of network utilization and ability to guarantee the same QoS metrics' performances to flows of the same AC (intra-class). The admission control mechanism ensures high protection to the admitted flows while maintaining high network utilisation.