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Performance Study of IEEE 802.11 Wireless LAN under High Traffic Conditions
Abstract
The IEEE 802.11b medium access control (MAC) protocol is gaining widespread popularity as a layer-2 protocol for wireless local area networks (WLANs). A good MAC protocol for WLANs should provide an efficient mechanism to share a limited wireless channel bandwidth, together with high bandwidth utilization and fairness in serving all stations. In this paper we study the performance of IEEE 802.11b WLAN under high traffic load conditions by simulation. We examine the effect of active stations on network throughput, mean delay and fairness performance especially at medium-to-high traffic loads under both ad hoc and infrastructure networks. Results show that the IEEE 802.11b protocol does not perform well in terms of providing high throughput, low mean delay and good fairness at medium-to-high traffic load conditions, and therefore the protocol requires an improvement.
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