A method for a user equipment (UE) is disclosed. The method includes receiving, by the UE, downlink control information (DCI) for a downlink (DL) scheduling assignment (DL-DCI), the DL-DCI indicating a first uplink (UL) carrier associated with a Physical Uplink Control Channel (PUCCH) resource configuration for transmitting an aperiodic UL transmission for uplink control information (UCI), and transmitting, by the UE, the aperiodic UL transmission for UCI in a second UL carrier without a PUCCH resource configuration, where the UE determines a resource allocation of the second UL carrier based on the DL-DCI. The DL-DCI includes at least one of: a UL/supplementary UL (SUL) carrier indicator, a Hybrid Automatic Repeat reQuest (HARQ)-ACK resource indicator (ARI), a sounding reference signal (SRS) request field, a HARQ timing indicator, or a channel station information (CSI) request.