International Association of Engineers
Wireless networks have been widely and intensively used on a global scale. In accordance with such a use, the limitation of the total throughput of an Access Point (AP) for the network has become a problem. This problem is especially serious when the AP is accessed by a lot of wireless terminals because the total throughput of the AP becomes much smaller than expected due to the collision of accesses by the terminals. IEEE 802.11 standards are usually adopted for such wireless networks and two basic access control methods are defined in the standards: Distributed Coordinated Function (DCF) and Point Coordinated Function (PCF).