| This paper introduces the basic structure of WLAN and the content of IEEE 802. 11. On considering the influence of parameters such as RTSJThreshold,packet error rate,I analyze the performance of CSMA/CA in basic access scheme as well as RTS/CTS scheme. By successfully simulated the functions of 802. 11 MAC sub-layer,I present some modified access method based on the basic scheme. And the performance of network is enhanced in view of the simulation result. At last,this paper also verified the effects of the new access method to the Service Differentiation. |
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