A user equipment, UE, configured to be operable in a wireless communication system, the UE comprising: a transceiver; and a processor configured to: receive, via the transceiver from a base station, information on a first configuration for a first set of downlink, DL, bandwidth parts, BWPs, wherein each DL BWP in the first set of DL BWPs has an index, information on a second configuration for channel state information-reference signal, CSI-RS resource sets in a second set of DL BWPs that is a subset of the first set of DL BWPs, information on a third configuration for CSI reports corresponding to the second set of DL BWPs, and information on CSI-RS resources among the CSI-RS resource sets in a third set of DL BWPs that is a subset of the second set of DL BWPs, determine a first number of CSI reports by using the received information on the CSI-RS resources, the first number being equal to a number of the CSI-RS resources, determine a second number of CSI reports, among the first number of CSI reports, each of the second number of CSI reports that includes a value for a CSI report quantity that are larger than all values for the CSI report quantity in other CSI reports except the second number of CSI reports among the first number of CSI reports and information indicating a corresponding DL BWP index, and transmit, to the base station via the transceiver, the second number of CSI reports including values for the CSI report quantity and the information indicating corresponding DL BWP indexes on a physical uplink control channel, PUCCH, or a physical uplink shared channel, PUSCH. a transceiver; and a processor configured to: receive, via the transceiver from a base station, information on a first configuration for a first set of downlink, DL, bandwidth parts, BWPs, wherein each DL BWP in the first set of DL BWPs has an index, information on a second configuration for channel state information-reference signal, CSI-RS resource sets in a second set of DL BWPs that is a subset of the first set of DL BWPs, information on a third configuration for CSI reports corresponding to the second set of DL BWPs, and information on CSI-RS resources among the CSI-RS resource sets in a third set of DL BWPs that is a subset of the second set of DL BWPs, determine a first number of CSI reports by using the received information on the CSI-RS resources, the first number being equal to a number of the CSI-RS resources, determine a second number of CSI reports, among the first number of CSI reports, each of the second number of CSI reports that includes a value for a CSI report quantity that are larger than all values for the CSI report quantity in other CSI reports except the second number of CSI reports among the first number of CSI reports and information indicating a corresponding DL BWP index, and transmit, to the base station via the transceiver, the second number of CSI reports including values for the CSI report quantity and the information indicating corresponding DL BWP indexes on a physical uplink control channel, PUCCH, or a physical uplink shared channel, PUSCH. receive, via the transceiver from a base station, information on a first configuration for a first set of downlink, DL, bandwidth parts, BWPs, wherein each DL BWP in the first set of DL BWPs has an index, information on a second configuration for channel state information-reference signal, CSI-RS resource sets in a second set of DL BWPs that is a subset of the first set of DL BWPs, information on a third configuration for CSI reports corresponding to the second set of DL BWPs, and information on CSI-RS resources among the CSI-RS resource sets in a third set of DL BWPs that is a subset of the second set of DL BWPs, determine a first number of CSI reports by using the received information on the CSI-RS resources, the first number being equal to a number of the CSI-RS resources, determine a second number of CSI reports, among the first number of CSI reports, each of the second number of CSI reports that includes a value for a CSI report quantity that are larger than all values for the CSI report quantity in other CSI reports except the second number of CSI reports among the first number of CSI reports and information indicating a corresponding DL BWP index, and transmit, to the base station via the transceiver, the second number of CSI reports including values for the CSI report quantity and the information indicating corresponding DL BWP indexes on a physical uplink control channel, PUCCH, or a physical uplink shared channel, PUSCH.