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A novel hidden station detection mechanism in IEEE 802.11 WLAN

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4 Author(s)
Youngsoo Kim ; Sch. of Electr. Eng., Seoul Nat. Univ. ; Jeonggyun Yu ; Sunghyun Choi ; Kyunghun Jang

The popular IEEE 802.11 wireless local area network (WLAN) is based on a carrier sense multiple access with collision avoidance (CSMA/CA), where a station listens to the medium before transmission in order to avoid collision. If there exist stations which can not hear each other, i.e., hidden stations, the potential collision probability increases, thus dramatically degrading the network throughput. The RTS/CTS (request-to-send/clear-to-send) frame exchange is a solution for the hidden station problem, but the RTS/CTS exchange itself consumes the network resources by transmitting the control frames. In order to maximize the network throughput, we need to use the RTS/CTS exchange adaptively only when hidden stations exist in the network. In this letter, a simple but very effective hidden station detection mechanism is proposed. Once a station detects the hidden stations via the proposed detection mechanism, it can trigger the usage of the RTS/CTS exchange. The simulation results demonstrate that the proposed mechanism can provide the maximum system throughput performance

Published in:

Communications Letters, IEEE  (Volume:10 ,  Issue: 8 )

Date of Publication:

Aug. 2006

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