On the basis of the embodiment shown in FIG. 14 above, the first control resource set includes K control resource subsets, each control resource subset of the K control resource subsets includes R first transmission units, each control resource subset of the K control resource subsets is located on one subband of the N subbands, the K control resource subsets are one-to-one corresponding to K subbands of the N subbands, where K and R are positive integers, K≤N and K*R≥S.

Optionally, the first control resource set includes K*R first transmission units, where a serial number of a first transmission unit included in a k-th control resource subset is k*R+r, the value of k is 0 to K?1, and the value of r is 0 to R?1.

Optionally, the first control resource set includes K*R first transmission units, where a serial number of a first transmission unit included in a k-th control resource subset is k+r*K, the value of k is 0 to K?1, and the value of r is 0 to R?1.

Optionally, the first transmission unit includes T resource unit groups, the R first transmission units include R*T resource unit groups, where a serial number of a resource unit group included in an r-th first transmission unit is r*T+t, the value of r is 0 to R?1, and the value of t is 0 to T?1.

Optionally, the first transmission unit includes T resource unit groups, the R first transmission units include R*T resource unit groups, where a serial number of a resource unit group included in an r-th first transmission unit is r+t*R, the value of r is 0 to R?1, and the value of t is 0 to T?1.

Optionally, the serial numbers of at least two transmission units of the S first transmission units are non-consecutive, where S≥2.