This paper presents an introduction on two projects which are intended to standardize physical layer and medium access control for wireless LANs - IEEE 802.11 and ETSI RES10 Hiperlan, and focuses on the applied access schemes. Further, the paper presents the simulation results, analyzing the performance of both access protocols depending on the number of stations and on the packet size, evaluating them regarding their capability to support QoS parameters, regarding the impact of hidden terminals and their range extension strategy.
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