Which of the following solutions to the imbalanced uplink and downlink coverage of high-frequency communication are correct? (Multiple choice)

Which of the following solutions to the imbalanced uplink and downlink coverage of high-frequency communication are correct? (Multiple choice)
A . Uplink and downlink decoupling, uplink and LTE share spectrum
B . Uplink and downlink decoupling, downlink and LTE share spectrum
C . Increase the transmit power of UE
D . Increase the transmit power of base station

Answer: AC