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In this paper, an improved analytical model for IEEE 802.11 Distributed Coordination Function (DCF) under finite load is proposed by closely following the specifications given in IEEE 802.11 standard. The model is investigated in terms of channel throughput under perfect and slow Rayleigh fading channels. It is shown that the proposed model gives better insight into the operation of DCF. IEEE 802.11 has been standardized and widely adopted for Wireless Local Area Networks (WLANs). In this standard, it specifies two fundamental access mechanisms, i.e., Point Coordination Function (PCF) and Distributed Coordination Function (DCF).
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