Journal of Parallel and Distributed Computing - Special issue on wireless and mobile computing and communications
Distributed fair scheduling in a wireless LAN
MobiCom '00 Proceedings of the 6th annual international conference on Mobile computing and networking
Dynamic tuning of the IEEE 802.11 protocol to achieve a theoretical throughput limit
IEEE/ACM Transactions on Networking (TON)
Quality of service schemes for IEEE 802.11 wireless LANs: an evaluation
Mobile Networks and Applications
Evaluation of Quality of Service Schemes for IEEE 802.11 Wireless LANs
LCN '01 Proceedings of the 26th Annual IEEE Conference on Local Computer Networks
Runtime Optimization of IEEE 802.11 Wireless LANs Performance
IEEE Transactions on Parallel and Distributed Systems
An Analysis for Differentiated Services in IEEE 802.11 and IEEE 802.11e Wireless LANs
ICDCS '04 Proceedings of the 24th International Conference on Distributed Computing Systems (ICDCS'04)
Performance analysis of the IEEE 802.11 distributed coordination function
IEEE Journal on Selected Areas in Communications
IEEE 802.11 protocol: design and performance evaluation of an adaptive backoff mechanism
IEEE Journal on Selected Areas in Communications
QoS provisioning in IEEE 802.11-compliant networks: Past, present, and future
Computer Networks: The International Journal of Computer and Telecommunications Networking
Performance Analysis of Dynamic Priority Shifting
EPEW '08 Proceedings of the 5th European Performance Engineering Workshop on Computer Performance Engineering
User-input driven QoS management in ad hoc networks
Computer Communications
Energy and delay optimized contention for wireless sensor networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
A simple adaptive optimization scheme for IEEE 802.11 with differentiated channel access
IEEE Communications Letters
Channel access throttling for improving WLAN QoS
SECON'09 Proceedings of the 6th Annual IEEE communications society conference on Sensor, Mesh and Ad Hoc Communications and Networks
A reservation based backoff method for video streaming in 802.11 home networks
IEEE Journal on Selected Areas in Communications
Adaptive weighted and prioritized polling for QoS provision in wireless networks
WD'09 Proceedings of the 2nd IFIP conference on Wireless days
A framework for cross-layer optimization of video streaming in wireless networks
ACM Transactions on Multimedia Computing, Communications, and Applications (TOMCCAP)
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In this paper, we derive, based on the analytical model developed by Cali et al., a multi-class model to study how to adaptively tune parameters in IEEE 802.11e EDCA and support service differentiation in WLANs. Through analytical modeling, we demonstrate that by assigning appropriate different attempt probabilities (or contention window sizes) to stations of different classes, it is feasible to provide (proportional) service differentiation and achieve pre-specified targeted throughput ratios among different classes, while at the same time, maximizing the total system capacity. We also extend the derived theoretical model to analyze the role of AIFS and TXOP values on service differentiation perceived by different traffic classes. We show that, to achieve QoS guarantees (i.e., throughput differentiation) and high channel utilization, it may not be desirable to allow tuning of multiple parameters (e.g., both the contention window sizes and the AIFS values). Instead, the design dimension should be kept small by turning only one set of parameters, while keeping the other two sets of parameters for all the access categories fixed (i.e., setting the AIFS values of all access categories to 2, which is equivalent to AIFS=DIFS). We also elaborate on how to incorporate our derived theoretical results into IEEE 802.11e. These include (i) how to reduce the computational complexity and practically calculate results on-line, (ii) how to convert the optimal parameters derived in the model that characterizes the p-persistent version of IEEE 802.11e to those in IEEE 802.11e (which is based on the notion of the contention window to determine whether or not to transmit in a slot), and (iii) how to on-line measure parameters needed for calculating the best value of the contention window size. Both the analytical models and the proposed approaches for practically incorporating theoretical findings into IEEE 802.11e EDCA are validated through detailed ns-2 simulations and empirical experimentation on a Linux-based MADWifi driver for wireless LAN devices with the Atheros chipset.