Performance Analysis of Point Coordination Function to Improve Quality of Services in IEEE 802.11

An improved IEEE 802.11 wireless local-area network (WLAN) is presented in this work. Wireless networks are better than the wired networks they provide a low-cost alternative to the traditional system. The IEEE 802.11 standard uses by Wireless LAN. There are basically to methods to access the medium Point coordination function (PCF) and Distributed coordination function (DCF). To improve the PCF a large work is performed and new schemes were proposed like Modified PCF, Dynamic PCF, ICF, BD-PCF, MM Scheme, etc. The PCF transmit the single packet at a time in the uplink and downlink communication. The new scheme is proposed, MoPCF scheme which checks the load of the traffic. The MoPCF schemes behavior is decided according to the number of packet at node. The proposed TOPCF scheme increases the throughput and decreases the delay in the WLAN. So MoPCF scheme enhances the Quality of Services. Simulation results show that the improved PCF outperforms the distributed coordination function (DCF) in both the basic-access and request/clear-to-send modes in terms of the total throughput and delay. The MoPCF work well compare to the PCF.