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Fig. 12 | EURASIP Journal on Wireless Communications and Networking

Fig. 12

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

Fig. 12

Interference ratio, transmission opportunity loss ratio, and reward of the fixed case and Q-learning @ − 6 dB. a Interference radio. b Transmission opportunity loss ratio. c Reward. The performance of the interference ratio, transmission opportunity loss ratio, and reward is compared for cases where the sensing time, and the reply time are fixed and the proposed Q-learning is used for SNR of − 6 dB. In a representing the interference ratio and b representing the transmission loss ratio, the Q-learning operates within a stable range, but other cases for fixed sensing time and reply time also operate within a stable range. However, in c, which indicates reward, Q-learning shows overwhelming performance difference compared to other cases. Thus, it can be shown that the system load can be reduced by using Q-learning

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