Journal
COMPUTER NETWORKS
Volume 50, Issue 11, Pages 1749-1768Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.comnet.2005.07.008
Keywords
802.11e; EDCA; wireless LAN; throughput analysis; optimal configuration; weighted max-min fairness
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One of the main challenges with 802.11e EDCA is the configuration of the open parameters of this mechanism, namely AIFS, CW(min), CW(max), and TXOP_limit. In this paper, we address the issue of finding the optimal configuration of these parameters in order to maximize the throughput performance of the WLAN. We first present a model to analyze the throughput performance of an EDCA WLAN as a function of these parameters. Then, based on this model, we search for the optimal EDCA configuration. We find out that, surprisingly, one of the EDCA parameters, the AIFS, is not used in the optimal configuration. We provide closed formulae, based on some approximations, for the configuration of the parameters CW(min) and CW(max). The configuration of the TXOP_limit parameter is discussed based on a delay analysis provided elsewhere. (c) 2005 Elsevier B.V. All rights reserved.
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