FIELD: information technology.
SUBSTANCE: packet transmitted from UE is received; said packet is decoded and it is determined whether the packet was successfully decoded; an ACK signal or a NACK signal is transmitted based on the decoding result. Different transmission powers are allocated for the ACK signal and the NACK signal. Alternatively, the transmission power for the NACK signal selectively has an OFF level. The present invention optimises the transmission powers for downlink ACK/NACK signals in accordance with the required reception quality of each of the ACK/NACK signals, and thus, enables the system to operate efficiently.
EFFECT: accurate determination of signal downlink transmission power.
6 cl, 3 dwg
