Abstract—WLANs have become increasingly popular and
widely deployed. The MAC protocol is one of the important
technology of the WLAN and affects communication efficiency
directly. In this paper, focusing on MAC protocol, we propose a
novel protocol that network nodes dynamically optimize their
backoff process to achieve high throughput while supporting
satisfied QoS. The total throughput decreases heavily and
cannot guarantee QoS under a high traffic load, which needs to
be improved. Through theoretical analysis, we find that the
average idle interval can represent current network traffic load
and can be used together with estimated number of nodes for
setting optimal CW. Since necessary indexes can be obtained
through direct measurement from channel, our scheme will not
increase any added load to networks. Through simulation
comparison with conventional method, we show that our scheme
can greatly enhance the throughput and the QoS no matter the
network is in saturated or non-saturated case, while maintaining
good fairness.
Index Terms—WLANs, MAC, EDCA, throughput.
The authors are with the School of Information Science and Technology,
Aichi Prefectural University, Japan (e-mail: im141008@cis.aichi-pu.ac.jp,
tan@ist.aichi-pu.ac.jp, okuda@ist.aichi-pu.ac.jp,
ideguchi@ist.aichi-pu.ac.jp).
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Cite:Takumi Sanada, Xuejun Tian, Takashi Okuda, and Tetsuo Ideguchi, "Improving Throughput and QoS with IEEE 802.11e," Journal of Advances in Computer Networks vol. 3, no. 2, pp. 106-113, 2015.