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 are a radio transmission apparatus, a radio receiving apparatus, a radio communication system, and a communication method that make it possible for the radio transmission apparatus performing OFDMA transmission to highly efficiently determine a radio receiving apparatus that is caused to participate in the OFDMA transmission. The radio transmission apparatus that performs OFDMA transmission with a plurality of radio receiving apparatuses includes a reception unit that has a function of performing carrier sense and a function of receiving a function information response frame including function response information indicating that a function of performing the OFDMA transmission is included, and a transmission unit that has a function of switching whether or not to transmit a frame to at least one of the plurality of radio receiving apparatuses on a basis of the carrier sense.

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: Included are a radio resource control layer processing unit configured to configure a first control resource set and a second control resource set, based on RRC signaling; a receiver configured to monitor PDCCH candidates in the first control resource set and the second control resource set; and a decoding unit configured to decode the PDCCH candidates, wherein the first control resource set includes OFDM symbols in a first half of the slot, the second control resource set includes OFDM symbols in a latter half of the slot, a first number of the PDCCH candidates are monitored in the first control resource set and a second number of the PDCCH candidates are monitored in the second control resource set in the slot until it is determined that the base station apparatus is transmitting a signal, and a third number of the PDCCH candidates are monitored in the first control resource set in the slot after it is determined that the base station apparatus is transmitting the signal.

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: 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: 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 includes: a receiver configured to receive higher layer signaling used for configuration of a HARQ-ACK PUCCH resource or a scheduling request PUCCH resource; and a transmitter configured to transmit a HARQ-ACK bit and a scheduling request bit, in which, in a case that the HARQ-ACK PUCCH resource overlaps with one or multiple scheduling request PUCCH resources in a time domain, a PUCCH format of the HARQ-ACK PUCCH resource for the HARQ-ACK transmission is a PUCCH format 1, and the scheduling request is a positive scheduling request, the HARQ-ACK bit is transmitted by using the PUCCH format 1 in the HARQ-ACK PUCCH resource, and a PUCCH format of the scheduling request PUCCH resource is a PUCCH format 0.

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.

Abstract: A terminal apparatus includes a coding unit configured to map coded bits for an uplink shared channel (UL-SCH) and a first sequence to a set of elements, and a transmitter configured to transmit a physical uplink shared channel (PUSCH), wherein each of the elements is identified by a subcarrier index of the PUSCH and an OFDM symbol index of the PUSCH, and whether the first sequence is mapped without using a prescribed set of elements is given based on at least the number of hybrid automatic repeat request HARQ-ACK bits mapped to the PUSCH.

Abstract: A terminal apparatus includes a receiver configured to receive a transport block, and a decoding unit configured to decode the plurality of first code blocks, in which each of the plurality of first code blocks is coded based on a soft buffer size, the soft buffer size is given based on at least a first value, the first value is the number of the plurality of first code blocks in an initial transmission of the transport block, the number of the plurality of first code blocks is given based on a size of the transport block, the size of the transport block is given based on at least an MCS field included in the downlink control information, in a case that at least one second code block is retransmitted, the first value is the number of the at least one second code block, and the at least one second code block includes some code blocks of the plurality of first code blocks resulting from the segmentation.

Abstract: A terminal apparatus receives RRC information indicating a maximum number of CBGs X per transport block, and transmits a HARQ-ACK corresponding to a PDSCH. The transport block is segmented into multiple code blocks. CBGs are categorized into an empty CBG and a non-empty CBG. The empty CBG is a CBG including no code block. The non-empty CBG is a CBG including at least one code block. A CBG group includes more than one of the CBGs. In a case that all the CBGs included in the CBG group belong to the empty CBG, a NACK is generated for each of the CBGs belonging to the empty CBG. In a case that the CBG group includes at least one CBG of the CBGs belonging to the empty CBG and at least one CBG of the CBGs belonging to the non-empty CBG, a NACK is not generated for the at least one CBG of the CBGs belonging to the empty CBG. The CBG group includes more than one of the CBGs. HARQ-ACKs for CBGs corresponding to the CBG group are generated as one bundled HARQ-ACK.

Abstract: Provided is a terminal apparatus configured to receive a PDCCH including DCI format 1C to which CRC parity bits scrambled with a CC-RNTI are added, and to transmit a preamble in an LAA cell, wherein a type of an uplink LBT procedure for a PRACH transmission is determined based on whether or not a PRACH resource to be used for the PRACH transmission is at least included in a subframe in an uplink duration in which no downlink physical channel is received, and a value of the uplink duration is given based at least on an ‘Uplink transmission duration and offset indication’ field included in the DCI format 1C.

Abstract: Included are: a receiver configured to receive a PDCCH with DCI format; and a transmitter configured to perform corresponding PUSCH transmission in subframe n+k upon detection of the PDCCH in subframe n. The value of k is given based on whether a search space in which the PDCCH is detected is CSS or USS.

Abstract: Provided are a radio transmission apparatus, a radio receiving apparatus, a radio communication system, and a communication method that make it possible for the radio transmission apparatus performing OFDMA transmission to highly efficiently determine a radio receiving apparatus that is caused to participate in the OFDMA transmission. The radio transmission apparatus that performs OFDMA transmission with a plurality of radio receiving apparatuses includes a reception unit that has a function of performing carrier sense and a function of receiving a function information response frame including function response information indicating that a function of performing the OFDMA transmission is included, and a transmission unit that has a function of switching whether or not to transmit a frame to at least one of the plurality of radio receiving apparatuses on a basis of the carrier sense.

Abstract: A terminal apparatus 1 and a base station apparatus 3 efficiently continue to communicate with each other. The terminal apparatus 1 is a terminal apparatus to be handed over from a source cell to a target cell, and the terminal apparatus is handed over from the source cell to the target cell, and includes a receiver 13 configured to receive a higher layer information mobilityControlInfo including a first uplink grant and a subframe allocation information and a transmitter 13 configured to perform a transmission based on the first uplink grant in one of a plurality of subframes indicated by the subframe allocation information, wherein the subframe allocation information indicates at least one of the plurality of subframes associated with a set having the same number across radio frames.

Abstract: A method for enabling a PUCCH with a TTI equal to or less than 1 ms. A terminal apparatus includes a transmitter configured to transmit an uplink signal on a PUCCH corresponding to a single SC-FDMA symbol, and a controller configured to determine transmit power for transmission on the PUCCH, wherein the uplink signal is generated based on a first sequence and a second sequence, the first sequence is given by applying a first cyclic shift to a third sequence, the second sequence is given by applying a second cyclic shift to the third sequence, and transmit power for transmission on the PUCCH is given based on a value of the first cyclic shift and a value of the second cyclic shift.