Maximum throughput and fairness aware backoff considering co-existence with legacy WLAN

This work presents a new backoff algorithm, namely Maximum Throughput and Fairness aware Backoff (MTFB), for IEEE 802.11 wireless LANs. The algorithm adaptively adjusts the contention window (CW) size so that the maximum throughput and fairness can be maintained even with large number of active stations (STAs). In mixed environments with the legacy 802.11 devices the algorithm is able to keep the predefined achievable throughput ratio and provide harmonious co-existence. Performance evaluations conducted in the event-driven simulator validate the accuracy of the mathematical model and show that MTFB outperforms existing proposals.