A terminal apparatus configured to communicate with a base station apparatus, comprising: a receiver configured to: receive configuration for an initial UpLink Band Width Part, UL BWP, and configuration for an additional UL BWP via a Radio Resource Control, RRC, message; and receive, in a common search space, a Downlink Control Information, DCI, format 0_0 with a Cyclic Redundancy Check, CRC, scrambled by a Temporary Cell-Radio Network Temporary Identifier, TC-RNTI, in a Control Resource Set, CORESET, configured for an active BWP, the DCI format 0_0 scheduling a Physical Uplink Shared CHannel, PUSCH; and a transmitter configured to transmit an Uplink Shared Channel, UL-SCH, by using the PUSCH in an active UL BWP, wherein one of the initial UL BWP and the additional UL BWP being activated as the active UL BWP, the receiver is configured to determine a bitwidth of a first field included in the DCI format 0_0 based on a size of the initial UL BWP, the transmitter is configured to determine contiguously allocated resource blocks for the PUSCH based on a value RIV indicated by the first field and following equations, where N size BWP is the size of the initial UL BWP, RB start is a number of a starting resource block for the contiguously allocated resource blocks, L RBs is a quantity of the contiguously allocated resource blocks, and resource block numbering for the contiguously allocated resource blocks is determined within the active UL BWP and starts from a lowest Resource Block, RB, of the active UL BWP, a receiver configured to: receive configuration for an initial UpLink Band Width Part, UL BWP, and configuration for an additional UL BWP via a Radio Resource Control, RRC, message; and receive, in a common search space, a Downlink Control Information, DCI, format 0_0 with a Cyclic Redundancy Check, CRC, scrambled by a Temporary Cell-Radio Network Temporary Identifier, TC-RNTI, in a Control Resource Set, CORESET, configured for an active BWP, the DCI format 0_0 scheduling a Physical Uplink Shared CHannel, PUSCH; and receive configuration for an initial UpLink Band Width Part, UL BWP, and configuration for an additional UL BWP via a Radio Resource Control, RRC, message; and receive, in a common search space, a Downlink Control Information, DCI, format 0_0 with a Cyclic Redundancy Check, CRC, scrambled by a Temporary Cell-Radio Network Temporary Identifier, TC-RNTI, in a Control Resource Set, CORESET, configured for an active BWP, the DCI format 0_0 scheduling a Physical Uplink Shared CHannel, PUSCH; and a transmitter configured to transmit an Uplink Shared Channel, UL-SCH, by using the PUSCH in an active UL BWP, wherein one of the initial UL BWP and the additional UL BWP being activated as the active UL BWP, the receiver is configured to determine a bitwidth of a first field included in the DCI format 0_0 based on a size of the initial UL BWP, the transmitter is configured to determine contiguously allocated resource blocks for the PUSCH based on a value RIV indicated by the first field and following equations, where N size BWP is the size of the initial UL BWP, RB start is a number of a starting resource block for the contiguously allocated resource blocks, L RBs is a quantity of the contiguously allocated resource blocks, and resource block numbering for the contiguously allocated resource blocks is determined within the active UL BWP and starts from a lowest Resource Block, RB, of the active UL BWP,