Performance of Wireless LAN in DCF and EDCF using OPNET

Author : Navneet Pal Singh, Kuldeep Arora, Suman Goyal

Abstract

The wireless local area network is a flexible data communications system implemented as an extension to, a wired LAN. Using radio frequency technology, wireless LANs transmit and receive data over the air, minimizing the need for wired connections. Thus, wireless LANs combine data connectivity with user mobility. Quality of service (Qos) is major research issue in the development of wireless LAN. So Qos need to be improved as the advancements in wireless technology goes on In this paper, effects of various access mechanisms on the performance of WLAN have been analyzed and compared using network simulators. The network simulators provide an ease in estimating the performance of networks. Among the various network simulators available, OPNET gains an edge in analyzing the performance of the networks through simulations. The metrics like throughput, delay and retransmission attempts have been used for performance analysis of the wireless computer networks using simulation through OPNET Modeler 14.0(1)

Keywords: IEEE 802.11, BSS, Qos, OPNET, Wired LAN