Method for detecting cognitive user in opportunity spectrum sharing system
A technology of cognitive users and detection methods, applied in the field of detection of cognitive users in opportunistic spectrum sharing systems, to achieve the effects of fairness, efficient spectrum sharing, and low probability of conflicts
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[0026] figure 1 It shows a frame structure example in which a single primary user occupies the authorized channel and a single secondary user detects the authorized channel and transmits data on the authorized channel. refer to figure 1 , the primary user's occupation of the authorized channel conforms to the exponential on-off traffic model. In this model, the primary user occupies the channel, that is, the average duration of opening is β 0 . The primary user does not occupy the channel, that is, the average duration of off is β i , the time taken by the primary user from occupying the channel to releasing the channel is t, which obeys the exponential distribution. Assuming that the frame length of the secondary user is T, t milliseconds before data transmission is used for detecting the channel of the primary user. When it is detected that the primary user does not exist, the secondary user data is transmitted within T-i time. During the data transmission process, the ...
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