Delayed contention DCF MAC protocol for IEEE 802.11 wireless LANs

This paper proposes a new MAC protocol called delayed contention DCF (DC-DCF) with a built-in traffic shaping feature for IEEE 802.11 wireless LANs. By suspending a number of active stations, the new protocol significantly reduces the probability of collision and provides better quality of service. The complexity of implementing such a protocol is low and the related parameter is easily determined. Simulation results show that the proposed protocol outperforms DCF in terms of throughput, the probability of collision, and average delay.