Performance Evaluation of IEEE 802.11e Based Wireless LAN in Multi Service Environments
IEEE 802.11 based wireless local area network (WLAN) is widely used due to cheaper cost and easy installation features. Now-a-days voice over IP (VOIP) is becoming more popular because VOIP stream already has WLANS as access network to the internet. Current WLANS provide only best-effort services without QOS guarantees. Enhancement of QOS is the key challenge in WLAN. IEEE 802.11e is enhanced a MAC protocol for QoS. In this paper we analyze the performance of IEEE 802.11e based network in multi service environments such as real time VOIP and elastic data services in a single WLAN. We observe the QOS parameters using HCF enabled with EDCA. Our OPNET based simulation results show that traffic delay and throughput of one class of service are affected by the characteristics of other class of traffic. We observed that the throughput increase of around 80% over the existing standards and enormous decrease in end to end delay.
KeywordsMedium Access Control Wireless Local Area Network Medium Access Control Protocol Contention Window Distribute Coordination Function
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