Distributed Collision-Resolvable Medium Access Control for Wireless LANs with Interference Cancellation Support

Abstract

Medium access control is critical in wireless networks for efficient spectrum utilization.In this paper, we introduce a novel collision resolution method based on the technique of known interference cancellation, and propose a new MAC protocol named as CR-MAC, in which AP tries to decode all the collided data packets by combining partial retransmissions and known interference cancellation.As the collided transmissions are fully utilized, less retransmission is required, especially in a crowded network.The NS-2simulation and MATLAB numerical results show that, under various network settings, CR-MAC performs much better than the IEEE 802.11DCF in terms of the aggregation throughput and the expected packet delay.