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According to the characteristics of common channel framework（CCF） multi-channel mechanism of 802.11s draft,a performance analytic model and method were proposed.Considering two states of assigning or no assigning common channel to transmit data existed in CCF,two performance analytic models based on common channel were proposed and throughput formulas were deduced,furthermore condition of state transition was presented.There were four parameters,such as data rate,payload,number of channels and number of stations,participating in the simulation of throughput.The simulation result shows that with increasing of data rate,increasing of number of stations and/or decreasing of payload,the number of channels needed decreases as state of assigning common channel transiting to state of no assigning common channel,and then the throughput of CCF reaches the maximum. more...

The data in The Dictionary of Modem Chinese show that there are 23 HAND words, which are words referring to the hand, the parts of the hand or the activities involving the hand and are labeled as classifiers (or measure words). Apart from those 23 words, such words as: "... cun (1/3 decimeter) ", "... zha(the distance between top of the thumb and the index finger or middle finger when the hand wide spreads)", "...quantou(fist)", "... bazhang(palm)", and "...JL zhiduer(finger breadth)", though not labeled as classifiers in the dictionary, can also act as measure words. In this paper, we put all of them into the same group so as to explore the motivations for their functioning as measure words. We argue that the classifier function of these words is the consequence of the interaction between the requirement of both accuracy and fuzziness for human language and the mechanism of human cognition which is characterized by ego-centrism, boundedness in construal, metaphorical thinking, and prototypieality in categorization. [ABSTRACT FROM AUTHOR] more...