APPARATUS FOR TRANSMITTING ACKNOWLEDGEMENT SIGNAL AND ITS METHOD

摘要

PROBLEM TO BE SOLVED: To provide a power control method which efficiently controls power in a system using automatic repeat request (ARQ) scheme and which controls the power of acknowledgement (ACK/NACK) signals for transmitting the ACK/ NACK signals in different power levels on the basis of the tolerance for the reception errors that the system requires.

SOLUTION: A method of transmitting the acknowledgment signals is constituted so that it successively performs: a process of transmitting a first acknowledgement signal with a first prescribed power level difference from a reference power level: and a process of transmitting a second acknowledgement signal with a second prescribed power level difference from the reference power level, where in the first prescribed power level difference and the second prescribed power level difference are different from each other in the system for transmitting two acknowledgement signals for a received data packet.

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