The present disclosure relates to a method for determining a first-link transmit power. In one example method, a user equipment (UE) obtains transmit power indication information of a first link. The UE determines a first transmit power of control information and a second transmit power of data based on the transmit power indication information. The UE sends the control information at the first transmit power, and the data at the second transmit power. The control information and the data are sent on the first link in a same subframe.