Networking

Reference-Based Fair MAC Algorithm in Wi-Fi WLANs with Capture Effect

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Executive Summary

The widespread deployment of infrastructure WLANs has made Wi-Fi an integral part of today's Internet access technology. Due to the inherent characteristics of the wireless medium in WLAN systems, the capture effect significantly affects the system performance; a receiver can successfully decode a collided frame given that its signal-to-interference and noise ratio is sufficiently high enough, but results in an unfair channel access share among the wireless nodes. In this paper, the authors propose Fair Capture Effect Aware MAC (FC-MAC) algorithm, which achieves channel access fairness using a feedback control mechanism. The authors determine the average waiting time as a common control reference, which provides fair channel access even when the capture effect is present.

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