WLAN throughput enhancement through distributed coordinate function DCF for 802.11 WLAN

WLANs have emerged as one of the most effective means for connecting to a network, this paper reviews the analysis of the original DCF and improves the model by providing more accurate analysis of the backoff algorithm depending on many parameters (frame size, cw, Tack, DIFS, SIFS, slot time, and number of nodes) to evaluate the delay access and the frame drop probability and the network throughput in both physical type DSSS and FHSS. After the proposed algorithm applied and change the effective parameters to achieve the best result and enhance the network performance and increase the network throughput, the results shows that the throughput increased depending on the increase of nodes number to reach to the maximum values for both DSSS, FHSS (0.87, 0.84)J.1s, also the simulation show that access delay and drop probability increase proportional with nodes number to reach the maximum values (9.8×10³ J.1s, 157packets). The matlab software was achieved to simulate all the networks used for the above simulations.