Collision and Priority of Packet Based Adaptive Enhanced Distributed Coordination Function

Based on some mechanisms of Distributed Coordination Function mechanism, we give the method of updating the parameters of system adaptively, and propose the CPAEDCF (Collision and Priority of Packet Based Adaptive Enhanced Distributed Coordination Function) mechanism, in which the collision rate and the priority of packet are considered. In CPAEDCF mechanism, the updating of back off time and the size of contention windows depend on a factor C, which can reflect the collision rate and the priority of packet. By numerical results, we conclude that CPAEDCF mechanism can ensure that each kind of packets access the channel adaptively, therefore, the CPAEDCF mechanism can improve the system performance.