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In Wi-Fi networks, mobile nodes compete for accessing the shared channel by means of a random access protocol called distributed coordination function (DCF), which is long term fair. But recent drivers allow users to configure protocol parameters differently from their standard values in order to break the protocol fairness and obtain a larger share of the available bandwidth at the expense of other...
The contention-based DCF suffers from collision seriously under heavy load conditions. In this paper, a novel medium access control protocol called contention-polling duality coordination function (CPDCF) is proposed to enhance the DCF-based MAC protocol. A polling ACK mechanism is introduced to admit the designated station to transmit without performing any contention process. By eliminating collisions...
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