A method performed by a user equipment, UE, in a wireless communication system, the method comprising: receiving, in a first control resource set, CORESET, of a first downlink, DL, Bandwidth Part, BWP, Downlink Control Information, DCI, for scheduling a Physical Downlink Shared Channel, PDSCH, the DCI comprising BWP switching information that indicates active DL BWP switching from the first DL BWP to a second DL BWP, and first Transport Block, TB1, information including a Modulation and Coding Scheme, MCS field of the TB1, a New Data Indicator, NDI field of the TB1, and a Redundancy Version, RV, of the TB1; processing the DCI including the first Transport Block information, based on the UE being configured to receive at most 1 Transport Block for the PDSCH in the first DL BWP and at most 2 Transport Blocks for the PDSCH in the second DL BWP; and receiving the TB1 through the PDSCH in the second DL BWP based on the DCI including the BWP switching information and the first Transport Block information, wherein processing the DCI comprises: assuming an MCS field of a second Transport Block, TB2, an NDI field of the TB2 and an RV of the TB2, which are not included in the DCI received in the first CORESET of the first DL BWP, are zero padded; and ignoring the MCS field of the TB2, the NDI field of the TB2 and the RV of the TB2, wherein, based on that the active DL BWP switching is indicated by the DCI: the UE assumes that a transmission configuration information, TCI, for the PDSCH is the same as a TCI for a CORESET having a lowest index among CORESETs. receiving, in a first control resource set, CORESET, of a first downlink, DL, Bandwidth Part, BWP, Downlink Control Information, DCI, for scheduling a Physical Downlink Shared Channel, PDSCH, the DCI comprising BWP switching information that indicates active DL BWP switching from the first DL BWP to a second DL BWP, and first Transport Block, TB1, information including a Modulation and Coding Scheme, MCS field of the TB1, a New Data Indicator, NDI field of the TB1, and a Redundancy Version, RV, of the TB1; processing the DCI including the first Transport Block information, based on the UE being configured to receive at most 1 Transport Block for the PDSCH in the first DL BWP and at most 2 Transport Blocks for the PDSCH in the second DL BWP; and receiving the TB1 through the PDSCH in the second DL BWP based on the DCI including the BWP switching information and the first Transport Block information, wherein processing the DCI comprises: assuming an MCS field of a second Transport Block, TB2, an NDI field of the TB2 and an RV of the TB2, which are not included in the DCI received in the first CORESET of the first DL BWP, are zero padded; and ignoring the MCS field of the TB2, the NDI field of the TB2 and the RV of the TB2, wherein, based on that the active DL BWP switching is indicated by the DCI: the UE assumes that a transmission configuration information, TCI, for the PDSCH is the same as a TCI for a CORESET having a lowest index among CORESETs. assuming an MCS field of a second Transport Block, TB2, an NDI field of the TB2 and an RV of the TB2, which are not included in the DCI received in the first CORESET of the first DL BWP, are zero padded; and ignoring the MCS field of the TB2, the NDI field of the TB2 and the RV of the TB2, wherein, based on that the active DL BWP switching is indicated by the DCI: the UE assumes that a transmission configuration information, TCI, for the PDSCH is the same as a TCI for a CORESET having a lowest index among CORESETs.