Abstract: A first PDCCH and a second PDCCH are received in a first cell, the first PDCCH including resource allocation information for a PDSCH of the first cell, the second PDCCH including resource allocation information for a PDSCH of a second cell, and a receiver configured to monitor one or more first PDCCH candidates and one or more second PDCCH candidates in a control resource set and a decoding unit configured to decode a first PDCCH candidate of the one or more first PDCCH candidates and a second PDCCH candidate of the one or more second PDCCH candidates are included, wherein the second PDCCH candidate with a first aggregation level includes multiple CCEs that are shifted, based on a carrier indicator, relative to multiple CCEs constituting the first PDCCH candidate with the first aggregation level, and the second PDCCH candidate with a second aggregation level includes one or more CCEs among the multiple CCEs constituting the second PDCCH candidate with the first aggregation level.

Abstract: A terminal apparatus is a terminal apparatus for communicating via a primary cell and a secondary cell, the terminal apparatus including: a receiver configured to receive an activation/deactivation MAC CE indicating activation of the secondary cell; and a medium access control layer processing unit configured to: activate a first downlink BWP in multiple downlink BWPs in a case that the activation/deactivation MAC CE is received and the secondary cell is not activated; and not to activate the first downlink BWP in a case that the activation/deactivation MAC CE is received, the secondary cell is activated, and a second downlink BWP of the secondary cell is activated. The first downlink BWP is different from the second downlink BWP.

Abstract: Provided is a terminal apparatus that performs an uplink LBT procedure, wherein one or more than one subframes are allocated for transmission of a message 3 in an LAA cell, and an LBT procedure for transmission of a random access preamble is initiated in a case where it is determined that a channel is busy in all of the one or more than one subframes.

Abstract: A terminal apparatus applies, in a case that a handover command is received, and the handover command includes skip information (rach-Skip) for indicating that a random access procedure for a target primary cell is skipped, a value of NTA indicated by target TA information (targetTA) included in the skip information (rach-Skip) to a target primary Timing Advance Group (TAG) after synchronization with a downlink of the target primary cell is initiated, and starts a Time Alignment (TA) timer associated with the target primary TAG.

Abstract: Uplink communication is efficiently performed in non-allocated frequencies. The terminal apparatus includes: a reception unit configured to receive downlink control information on a PDCCH; and a transmission unit configured to transmit a random access preamble. For a first frame structure type, the downlink control information is used to configure a subframe number of a first uplink subframe in which transmission of the random access preamble is allowed. For a second frame structure type, the downlink control information is used to configure a subframe number of a second uplink subframe in which transmission of the random access preamble is allowed and a symbol number of an uplink symbol in the second uplink subframe.

Abstract: A terminal apparatus transmits capability information. The capability information includes a first capability parameter, a second capability parameter, and a third capability parameter. The first capability parameter indicates whether the terminal apparatus supports Semi-Persistent Scheduling in a primary cell. The second capability parameter indicates whether the terminal apparatus supports skipping of uplink transmission corresponding to a grant configured for a primary cell in a case that there is no available data for transmission in a buffer of the terminal apparatus. The third capability parameter indicates whether the terminal apparatus supports Semi-Persistent Scheduling in an LAA secondary cell, and whether the terminal apparatus supports skipping of uplink transmission corresponding to a grant configured for an LAA secondary cell in a case that there is no available data for transmission in the buffer of the terminal apparatus.

Abstract: A terminal apparatus configures transmission timing for a PUSCH in a target cell based on first information included in a handover command received. The terminal apparatus initiates a random access procedure in a primary cell, at least in a case that an SR is pending, a UL-SCH resource is not available for transmission in a current subframe, and a valid PUCCH resource for the SR is not available in any one of subframes. The terminal apparatus does not initiate the random access procedure in the primary cell, in the case that the SR is pending, the UL-SCH resource is not available for the transmission in the current subframe, and the valid PUCCH resource for the SR is not available in any one of the subframes, and at least in a case that the first information is configured.

Abstract: A terminal apparatus includes a transmitter configured to transmit a UCI payload with CRC bits by using a PUCCH, wherein a size of the CRC bits added to the UCI payload is a first size, and a number of PRBs of a resource of the PUCCH is given based on a second size of the CRC bits.

Abstract: A terminal apparatus for receiving a Physical Downlink Control Channel (PDCCH) is provided. The terminal apparatus includes: a radio resource control layer processing unit configured to configure a control resource set based on Radio Resource control (RRC) signaling; a receiver configured to monitor a plurality of PDCCH candidates in the control resource set; and a decoding unit configured to decode a PDCCH candidate of the plurality of PDCCH candidates where the control resource set is configured for a Listen-Before-Talk subband (LBT subband) in a bandwidth part (BWP).

Abstract: A terminal apparatus and a base station apparatus efficiently continue communication with each other. A terminal apparatus is configured to perform a handover from a source cell to a target primary cell, the terminal apparatus includes: a receiver configured to receive a handover command; and a transmitter configured to transmit an RRC complete message after starting synchronization with a downlink of the target primary cell, in which, in a case that a parameter MobilityControlInfo included in the handover command includes a parameter associated with a TA and in a case of detecting, in the target primary cell, a PDCCH to which a CRC parity hit scrambled by a C-RNTI is attached, a T304 timer is stopped.

Abstract: Provided is a transmission unit that, if transmission of a PUCCH of a first CG overlaps transmission of a PUSCH and/or a PUCCH of a second CG in a certain subframe and UCI including HARQ-ACK is transmitted on the PUCCH of the first CG, upon transmit power of the PUCCH of the first CG exceeding a first upper limit value, performs scaling on the transmit power of the PUCCH of the first CG such that the transmit power of the PUCCH does not exceed the first upper limit value, and upon the transmit power of the PUCCH of the first CG not exceeding the first upper limit value, sets the transmit power of the PUCCH of the first CG to power required for the PUCCH of the first CG.

Abstract: A terminal communicating with a base station by using an FDD cell and a TDD cell includes a reception unit that performs reception over a PDCCH transmitted using a DCI format. In a case where the TDD cell is configured as a primary cell for the terminal, a first uplink reference UL-DL configuration used for determining an interval between reception of the PDCCH indicating transmission of a PUSCH and the transmission of the PUSCH is configured for the TDD cell, and a second uplink reference UL-DL configuration used for determining whether or not to use DAI included in the DCI format of the PDCCH indicating the transmission of the PUSCH is configured for the FDD cell.

Abstract: A terminal apparatus increments a transmit counter based on a failure of random access response reception or contention resolution, and receives information for indicating a higher layer parameter powerRampingStep(1) and information for indicating a higher layer parameter powerRampingStep(2). A transmit power for PRACH transmission in a first step of a 2 step contention based random access procedure is given based at least on the transmission counter and the higher layer parameter powerRampingStep(1), and a transmit power for PUSCH transmission in the first step of the 2 step contention based random access procedure is given based at least on the transmission counter and the higher layer parameter powerRampingStep(2).

Abstract: Included is an uplink power control unit configured not to apply a first correction value obtained from a TPC command included in a first DCI format to transmit power for a PUSCH and applies a second correction value obtained from a TPC command included in a second DCI format to transmit power for an sPUSCH, in a case that a subframe m is later than a subframe n, that a subframe m+B for transmitting the sPUSCH is earlier than a subframe n+A for transmitting the PUSCH, and that a transmission subframe for the PUSCH and a transmission subframe for the sPUSCH belong to an identical uplink power control subframe set in a first serving cell.

Abstract: Transform precoding is applied to the complex value modulation symbol in a case that transform precoding is enabled for PUSCH, the prescribed modulation scheme is provided based at least on a first MCS table and an MCS field value included in the DCI format in a case that the DCI format includes a CRC scrambled by a TC-RNTI and the transform precoding is enabled for the PUSCH, and the prescribed modulation scheme is provided based on at least a second MCS table and/or the MCS field value in a case that the DCI format is a first uplink DCI format with the CRC scrambled by a C-RNTI, the transform precoding is enabled for the PUSCH, and a higher layer parameter MCS-Table-PUSCH-tp is set to a first value.

Abstract: This terminal apparatus is provided with: a receiver configured to receive at least a first physical signal and/or a second physical signal, wherein the first physical signal is generated during a first period, the first physical signal corresponds to a first beam during the first period, the second physical signal corresponds to the first beam in a case that the second physical signal is generated during the first period, and the second physical signal corresponds to a second beam in a case that the second physical signal is generated during a second period.

Abstract: Multiple PDCCH candidate groups included in a search space of a second aggregation level are given based on at least one or more PDCCH candidates included in a search space of a first aggregation level. Each of the multiple PDCCH candidate groups corresponds to each of the at least one or more PDCCH candidates included in the search space of the first aggregation level.

Abstract: Uplink communication is efficiently performed in non-allocated frequencies. The terminal apparatus includes: a reception unit configured to receive downlink control information on a PDCCH; and a transmission unit configured to transmit a random access preamble. For a first frame structure type, the downlink control information is used to configure a subframe number of a first uplink subframe in which transmission of the random access preamble is allowed. For a second frame structure type, the downlink control information is used to configure a subframe number of a second uplink subframe in which transmission of the random access preamble is allowed and a symbol number of an uplink symbol in the second uplink subframe.

Abstract: A terminal apparatus for performing discontinuous reception (DRX) at least monitors both a PDCCH for C-RNTI and a PDCCH for CC-RNTI for a DRX-related active time and monitors a PDCCH for CC-RNTI in a period of a CC-RNTI monitoring window. The CC-RNTI monitoring window is started in a subframe n?X+1, and in a case that a second PDCCH is detected in a subframe n?X+v or a subframe up to the subframe n?X+v, the CC-RNTI monitoring window is ended in the subframe n in which the second PDCCH is detected, or in a case that the second PDCCH is not detected in the subframe n?X+v or the subframe up to the subframe n?X+v, the CC-RNTI monitoring window is ended in the subframe n?X+v.

Abstract: The present invention includes: a receiver configured to receive a DCI format used for scheduling a PDSCH, and a higher layer parameter including a parameter subframeAssignment-r15; and a transmitter configured to transmit a HARQ-ACK corresponding to the PDSCH, wherein in a case that a duplex mode of a primary cell is an FDD, whether the number of bits in a HARQ process number field in the DCI format is three bits or four bits is determined, based on whether or not an EN-DC is configured, whether or not the higher layer parameter including the parameter subframeAssignment-r15 is configured, and whether or not the DCI format is mapped to a USS given by a C-RNTI.