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Due to their ease of deployment, 802.11 networks are widely used. To cope with increasing throughput requirements, and to take advantage of improvements in hardware performance, 802.11n has been introduced. One of the extra features is the 20/40 functionality, which allows 802.1 In devices to operate using one or two 802.11 channels. In this paper, we study the contention rules for such 20/40 operation...
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