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Effects on IEEE 802.11 MAC Throughput in Wireless LAN Over Fiber Systems

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4 Author(s)
Das, A. ; Univ. of Kent, Canterbury ; Mjeku, M. ; Nkansah, A. ; Gomes, N.J.

An experimental investigation of the influence of the fiber distribution of wireless LAN (WLAN) signals on throughput performance is presented. Transmission using different medium-access-control mechanisms and IEEE 802.11b and 802.11g physical layers is considered, and results are compared with those from the corresponding simulations in a commercial event-driven network simulator (OPNET). Performance of the WLAN-over-fiber network in the presence of multiple clients is also analyzed. This paper confirms that a fiber delay does not significantly affect the performance obtained by fragmentation mechanism. Furthermore, when multiple antenna units are fed by a single access point, it is demonstrated that the presence of hidden nodes can cause the performance of WLAN-over-fiber networks to deteriorate. Finally, it is shown that the request-to-send/clear-to-send mechanism can be utilized to mitigate the negative effects associated with the hidden node problem.

Published in:

Lightwave Technology, Journal of  (Volume:25 ,  Issue: 11 )

Date of Publication:

Nov. 2007

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