Load Self-adaptive DCF Implement and Performance Analysis Based on NS2

According to the running process of load self-adaptive DCF mechanism,the simulation module of IEEE802.11 WLAN- Mac_802.11 class in NS2 was modified and extended to implement the simulation of load self-adaptive DCF mechanism by NS2.Simulation results indicate,compared with standard DCF mechanism,the load self-adaptive DCF mechanism can enhance the performance of IEEE802.11 WLAN in throughput,delay,delay jitter and fairness.