Similarly, for different terminal devices, a combination of status values of different information fields may be indicated in an information block in the first DCI. For example, the second DCI of the terminal device A includes the BWP ID information field, the time domain scheduling indicator (cross-slot or same-slot) information field, the trigger RS resource indicator information field, and the carrier transmission indicator information field. The information block corresponding to the terminal device A in the first DCI may use two bits to indicate status values of the foregoing four information fields. Second DCI of a terminal device B includes the trigger RS resource indicator information field and the carrier transmission indicator information field. An information block corresponding to the terminal device A in the first DCI may use two bits to indicate status values of the foregoing two information fields.