A frequency domain resource configuration method, comprising: obtaining, by a base station, a first frequency hopping parameter set for hopping among N sub-bands for a UE, wherein there is a mapping relationship between the N sub-bands and a frequency hopping pattern that is indicated by the first frequency hopping parameter set, the sub-band is a length of consecutive frequency domain resources in a system bandwidth, and N>1; and sending, by the base station, first configuration information to the UE by using first signaling, the first signaling includes first system information, SI, wherein the first configuration information comprises sub-band identifiers of the N sub-bands and the first frequency hopping parameter set; wherein the N sub-bands are used to transfer a public message, the public message comprises at least one of the following: SI, a random access response, RAR, or paging information; said method characterized in that after sending the first configuration information, the method further comprises: generating, by the base station, second configuration information according to the N sub-bands, where the second configuration information includes sub-band identifiers of M sub-bands, any one of the M sub-bands is used to transfer at least one of the following: unicast data between the UE and the base station, a downlink control channel for scheduling the unicast data, an uplink control channel for scheduling the unicast data, or a physical random access channel for scheduling the unicast data, the M sub-bands are any subset of the N sub-bands, and 1≤M≤N; and sending, by the base station, the second configuration information to the UE by using second signaling, where the second signaling includes radio resource control RRC signaling. obtaining, by a base station, a first frequency hopping parameter set for hopping among N sub-bands for a UE, wherein there is a mapping relationship between the N sub-bands and a frequency hopping pattern that is indicated by the first frequency hopping parameter set, the sub-band is a length of consecutive frequency domain resources in a system bandwidth, and N>1; and sending, by the base station, first configuration information to the UE by using first signaling, the first signaling includes first system information, SI, wherein the first configuration information comprises sub-band identifiers of the N sub-bands and the first frequency hopping parameter set; wherein the N sub-bands are used to transfer a public message, the public message comprises at least one of the following: SI, a random access response, RAR, or paging information; said method characterized in that after sending the first configuration information, the method further comprises: generating, by the base station, second configuration information according to the N sub-bands, where the second configuration information includes sub-band identifiers of M sub-bands, any one of the M sub-bands is used to transfer at least one of the following: unicast data between the UE and the base station, a downlink control channel for scheduling the unicast data, an uplink control channel for scheduling the unicast data, or a physical random access channel for scheduling the unicast data, the M sub-bands are any subset of the N sub-bands, and 1≤M≤N; and sending, by the base station, the second configuration information to the UE by using second signaling, where the second signaling includes radio resource control RRC signaling. generating, by the base station, second configuration information according to the N sub-bands, where the second configuration information includes sub-band identifiers of M sub-bands, any one of the M sub-bands is used to transfer at least one of the following: unicast data between the UE and the base station, a downlink control channel for scheduling the unicast data, an uplink control channel for scheduling the unicast data, or a physical random access channel for scheduling the unicast data, the M sub-bands are any subset of the N sub-bands, and 1≤M≤N; and sending, by the base station, the second configuration information to the UE by using second signaling, where the second signaling includes radio resource control RRC signaling.