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EURASIP Journal on Wireless Communications and Networking
Fig. 18 | EURASIP Journal on Wireless Communications and Networking

Fig. 18

From: Q-learning-based dynamic joint control of interference and transmission opportunities for cognitive radio

Fig. 18

PU existence count ratio according to E[on]. Shows the detection ratio of the number of PU appearances according to the ratio of E[on]. The proposed method has a high value in all regions because it continuously sense the channel. However, the conventional method cannot detect if the PU appears only in the data transmission interval because the sensing and transmission intervals are alternately performed. The conventional method increases the PU existence count ratio because E[on] increases the probability that the sensing interval overlaps with the PU busy interval

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