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Weighted Fair Uplink/Downlink Access Provisioning in IEEE 802.11e WLANs

Summary: Weighted Fair Uplink/Downlink Access
Provisioning in IEEE 802.11e WLANs
Feyza Keceli, Inanc Inan, and Ender Ayanoglu
Center for Pervasive Communications and Computing, Department of Electrical Engineering and Computer Science
The Henry Samueli School of Engineering, University of California, Irvine
Email: {fkeceli, iinan, ayanoglu}@uci.edu
Abstract-- We present the unfairness problem between the
uplink and the downlink flows in the IEEE 802.11e infrastructure
Basic Service Set (BSS) when the default settings of the Enhanced
Distributed Channel Access (EDCA) parameters are used. First,
we propose an analytical model to calculate the EDCA parameter
set that ideally achieves a predetermined utilization ratio between
uplink and downlink flows. Next, we design a simple and
practical model-assisted measurement-based dynamic parameter
adaptation algorithm. In the design of the proposed algorithm, we
also consider the interactions of the bi-directional communication
structure of Transmission Control Protocol (TCP) with the
Medium Access Control (MAC) layer algorithm. Via simulations,
we show that our solution provides short- and long-term fair
access for uplink and downlink TCP and User Datagram Protocol


Source: Ayanoglu, Ender - Department of Electrical and Computer Engineering, University of California, Irvine


Collections: Engineering