Exploiting Packet Distribution for Tuning RTS Threshold in IEEE 802.11

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Executive Summary

IEEE 802.11 Medium Access Control (MAC) protocol employs two techniques for packet transmission; the basic access scheme and the RTS/CTS-based reservation scheme. A parameter called RTS Threshold determines which scheme to use. If packet size is smaller than the RTS Threshold then the basic scheme is used otherwise the reservation scheme is used. With current standard, the RTS Threshold is fixed. In this paper, the authors first point out the advantages and disadvantages of RTS/CTSbased scheme. Then they state the problems of having a fixed RTS Threshold. Next, they present a numerical way to fix the RTS Threshold adaptively based on network traffic.

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