IEEE 802.11 Performance Improvement by Selecting Optimal Backoff Stage

In this paper we propose a new method which adjusts the collision resolution depending on busy status of the channel to improve performance of IEEE 802.11 DCF. This scheme reduces the number of collisions in wireless channel by decreasing the amount of movements of each station's backoff stage based on busy event count and the one stage backoff model. Through simulation, we compared the performance of our scheme with that of DCF, ADCF and SD.