Dynamic Optimization for IEEE 802.11 DCF Access Method over Noisy Channels

Abstract

The basic access method in IEEE 802.11 protocol is the distributed coordination function (DCF). This strategy incurs a high collision probability and channel utilization is degraded in bursty arrival or congested scenarios. Besides, when a frame is collided on wired network, extending the backoff time just makes matters worse because it brings bandwidth wastage. In this paper, we attempt to identify the relationship between backoff parameters and channel BER and put forth a pragmatic problem-solving solution. In addition to theoretical analysis, simulations are conducted to evaluate the performance scheme. As it turns out, our design indeed provides a remarkable improvement in a heavy load and error-prone WLANs environment.