Abstract:

IEEE802.11 is the most popular WLAN standard based on CSMA/CA. The primary Medium Access Control (MAC) protocol of IEEE802.11 is the contention-based distributed coordination function (DCF) which adopts uniform distribution for backoff process. In this paper, a Markov model is introduced to analyze the impact of backoff time distribution on system performance of IEEE802.11 DCF.A simple and effective mechanism for backoff time distribution is the proposed. Simulation result proves that this mechanism can effectively improve saturation throughput .

Key words:

Keywords: distributed coordination function, backoff time distribution, saturation throughput