Busy tone based multi-slot allocation protocol for improving performance in IEEE WLANs

In order to improve the performance of the EDCA mechanism, an efficient collision resolution protocol must be used. To this end, many collision reduction protocols have been proposed. However, there remain still many problems. In this paper, we propose a novel multi-slot allocation protocol to resolve the collisions. The proposed protocol uses short-duration busy-tone signals to avoid collisions and not to waste channel time. Based on the busy-tone signals and new control packets, the proposed protocol allocates time slots for data transmissions. Simulation results show that the proposed protocol works well and improves network performance.