A lot of researches on IEEE 802.11 had been done, particularly on the performance analysis and improvement of DCF mechanism. However most of the studies were only on some aspect and lacked of systemic. On the other hand, the scenarios in previous' studies were mostly in ad hoc network only few in the network with infrastructure. This paper analyzed the IEEE 802.11 completely and systematically in both ad hoc network and WLAN with AP by modeling and simulating method. A performance abstract model of IEEE 802.11 was created by using POOSL and the Software/hardware engineering (SHE) method design...
