Contention Awared Adaptive Backoff Mechanism in IEEE 802.11 Wireless LAN

To improve the performance of IEEE 802.11 wireless LAN, a novel contention aware adaptive contention window scheme is proposed in this paper. Compared with the binary exponential backoff algorithm defined in standard, our scheme can determine the contention window based on the collision status rapidly and the collision probability can be reduced dramatically. The analysis results show that our mechanism is able to utilize the radio resource reasonably.