Enhancing Performance of WLAN by Combining Contention Window and Transmitting Time Adjusting Scheme

To improve the performance of IEEE 802.11 wireless local area network (LAN),this paper presents a novel contention aware adjusting mechanism combining adaptive contention window and random varying timing method.The adaptive contention window scheme can determine the contention window based on the collision status rapidly,and the dynamical varying timing method can make the node adjust the number of packets sending during the busy or idle period.The simulations show that our mechanism is able to optimize the parameters of packets sending,utilize the radio resource reasonably,and decrease the average packet delay obviously.