Abstract: Provided is a terminal apparatus including a receiver that can receive a PSDCH and a transmitter that can transmit an HARQ-ACK for the PDSCH by use of a PUCCH. In the terminal apparatus, the transmitter shortens a timing for transmitting the HARQ-ACK for the PDSCH based on a prescribed TTI length configured for the PDSCH, and a PUCCH format to transmit the HARQ-ACK is determined based on the TTI length of the PDSCH and the TTI length of the PUCCH.

Abstract: Processing relating to transmit power is efficiently performed. A terminal device includes a reception unit configured to receive a first parameter and a second parameter, and a first MAC processing unit configured to acquire a type 2 power headroom. The first MAC processing unit acquires a value of the type 2 power headroom for a primary cell, in a case that the first parameter is configured and that simultaneous transmissions on a Physical Uplink Control CHannel (PUCCH) and on a Physical Uplink Shared CHannel (PUSCH) are configured, and acquires a value of the type 2 power headroom for the primary cell, regardless of whether simultaneous transmissions on the Physical Uplink Control CHannel (PUCCH) and on the Physical Uplink Shared CHannel (PUSCH) are configured in a case that the second parameter is configured.

Abstract: A mobile station device executes processing on uplink control information by effectively using uplink resources when transmitting the uplink control information. The mobile station device generates a plurality of ACK/NACK sequences by interleaving and dividing ACKs/NACKs for a plurality of cells in a plurality of subframes, and separately encodes the plurality of ACK/NACK sequences. Also, the mobile station device interleaves a plurality of ACKs/NACKs and a scheduling request together.

Abstract: Uplink control information can be efficiently transmitted. A terminal apparatus (1): (i) receives an uplink grant used for scheduling of a PUSCH and an uplink grant used for scheduling of a sPUSCH; (ii) transmits uplink control information; and (iii) in a first case of performing sPUSCH transmission in a first subframe in the primary cell and performing PUSCH transmission in the first subframe in the secondary cell, transmits the uplink control information by using the PUSCH in the first subframe in the secondary cell.

Abstract: A user equipment (UE) receiving, from a base station (BS), a higher layer signal including first information used for configuring more than one sets of one or more downlink component carriers (DCCs). The UE receives, using a physical downlinkn k control channel (PDCCH) in a UE-specific search space in a first subframe, from the BS, downlink control information (DCI) including second information indicating a trigger for a transmission of channel state information (CSI), the transmission of the CSI being triggered for one set of the more than one sets of one or more DCCs, the DCI being used for scheduling of a physical uplink shared channel (PUSCH) in one uplink component carrier. The UE transmits, using the PUSCH in a second subframe, to the BS, the CSI for the one set of the more than one sets of one or more DCCs in a case that the DCI including the second information indicating the trigger for the transmission of the CSI is received in the user equipment search space.

Abstract: Provided is a terminal apparatus to receive multiple pieces of random access configuration information, to select one piece of random access configuration information to be used in a random access procedure out of the multiple pieces of random access configuration information, and to transmit a random access preamble on the basis of the selected one piece of random access configuration information.

Abstract: Provided is a terminal device configured to transmit an RI for PDSCH transmission, to receive first information used for determining a first maximum number of layers being a first maximum number assumed for determining the bit width for the RI, to receive a transport block on the PDSCH, and to decode a code block of the transport block. Here, in a case that the decoding of the coded block fails, at least soft channel bits corresponding to a range of prescribed soft channel bits are stored, and the prescribed soft channel bits are based on the first information used for determining the aforementioned first maximum number of layers.

Abstract: Provided is a terminal device that is in a network coverage in a carrier which is used for first communication and/or first discovery, the device including: a transmission unit configured to transmit first information for indicating an uplink-downlink configuration relating to Time Division Duplex (TDD) on a physical channel relating to the first communication and/or the first discovery; and a configuration unit configured to set the first information to a specific value (a predetermined value), in a case where a carrier in which the first information is transmitted is an uplink carrier for Frequency Division Duplex (FDD), in which the first communication is a mode of communication in which the terminal device and a different terminal device communicate directly with each other, and in which the first discovery is defined as a process that identifies the different terminal device in proximity using a direct signal.

Abstract: A terminal device is provided such that in a case that closed-loop UE transmit antenna selection is configured, a bit sequence is given by scrambling CRC parity bits with an RNTI and an antenna selection mask, in a case that the number of the CRC parity bits is a first value, a first transmit antenna port is given by a first antenna selection mask, and in a case that the number of the CRC parity bits is a second value, the first transmit antenna port is given by a second antenna selection mask that is different from the first antenna selection mask.

Abstract: With respect to uplink carrier aggregation, transmit power in a serving cell (c) is determined on the basis of maximum output power (PCMAX, C) for the serving cell c and total maximum output power (PCMAX). The maximum output power (PCMAX, C) for the serving cell (c) is based on maximum output power (PPowerClass) defined by a power class corresponding to a band to which the serving cell (c) belongs, and the total maximum output power (PCMAX) is based on maximum output power (PPowerClass) defined by a power class corresponding to a combination of aggregated bands.

Abstract: A terminal device and a base station device efficiently communicate with each other. The terminal device includes a transmission unit configured to repeatedly transmit uplink control information including at least one CQI using a plurality of PUCCHs in a plurality of subframes, in a case where uplink control information is transmitted in the PUCCH in an initial subframe included in the plurality of subframes, based on whether the uplink control information includes an HARQ-ACK, (i) the uplink control information is transmitted using the PUCCH in a first subframe included in the plurality of subframes, or (ii) the uplink control information is not transmitted in the first subframe included in the plurality of subframes.

Abstract: A user equipment (UE) is described. The UE includes receiving circuitry configured to receive system information comprising first information of first time domain resource assignment for a physical downlink shared channel (PDSCH). The receiving circuitry is also configured to receive a UE-specific radio resource control (RRC) signal comprising second information of second time domain resource assignment for a PDSCH. The receiving circuitry is also configured to perform, based on a detection of a physical downlink control channel (PDCCH), the PDSCH reception according to either the first information of the first time domain resource assignment or the second information of the second time domain resource assignment.

Abstract: A user equipment is described. The use equipment includes receiving circuitry configured to receive a radio resource control (RRC) message comprising first information used for configuring a frequency domain occasion for a physical random access channel (PRACH) transmission, the first information being for a first uplink (UL) in a serving cell. The receiving circuitry is configured to receive a RRC message comprising second information used for configuring a frequency domain occasion for the PRACH transmission, the second information being for an supplementary uplink in the serving cell, the supplementary uplink (SUL) being different from the first UL. The user equipment also includes transmitting circuitry configured to perform the PRACH transmission. The receiving circuitry is configured to receive downlink control information with cyclic redundancy check (CRC) scrambled by a random access-radio network identifier (RA-RNTI).

Abstract: To make a mobile station apparatus efficiently generate a base sequence. In a mobile station apparatus that generates a sequence for a demodulation reference signal on the basis of at least a sequence group number and transmits to a base station apparatus the demodulation reference signal together with a physical uplink shared channel used for transmission of a transport block, the mobile station apparatus receives information indicating a value of a parameter relating to the sequence from the base station apparatus, and determines the sequence group number without using the value of the parameter in a case where the mobile station apparatus performs transmission of the transport block on the physical uplink shared channel as part of a contention based random access procedure.

Abstract: A communication system comprises at least a base station device and a terminal device. The terminal device transmits a demodulation reference signal associated with a physical channel, receives a configuration of comb of the demodulation reference signal, and transmits the demodulation reference signal mapped based on the configuration of comb. The base station device transmits a configuration of comb of a demodulation reference signal related to a physical channel.

Abstract: A MS transmits, to a BS, uplink data (UD) on a PUSCH, PUSCH being assigned by using a PDCCH. The MS receives on PDCCH, an indication instructing the MS to transmit reception quality information (RQI) without UD on PUSCH, and transmits on PUSCH, to the BS, RQI without UD based on the indication which is received on PDCCH. The indication is specified based on values to which a plurality of fields of information transmitted on PDCCH are set. One of the plurality of fields is a field used for instructing the MS to transmit RQI and another is a field used for indicating a redundancy version. For instructing the MS to transmit RQI without UD on PUSCH, the field used for instructing the MS to transmit RQI is set to a first single predetermined value (SPV) and the field used for indicating the redundancy version is set to a second SPV.

Abstract: A terminal apparatus which performs periodic channel state information reporting to a base station apparatus, the terminal apparatus including a reception unit that receives first information, second information, and index information indicating a value for reporting periodicity of the channel state information, from the base station apparatus, and a transmission control unit that determines the value for reporting periodicity of the channel state information on the basis of the index information, in which the applicable value is based on a certain UL-DL configuration, in which, in a case where the second information is not configured, the certain UL-DL configuration is a UL-DL configuration indicated by the first information, and in which, in a case where the second information is configured, the certain UL-DL configuration is a UL-DL configuration indicated by the second information.

Abstract: Processing relating to transmit power is efficiently performed. A terminal device includes a reception unit configured to receive a first parameter and a second parameter, and a first MAC processing unit configured to acquire a type 2 power headroom. The first MAC processing unit acquires a value of the type 2 power headroom for a primary cell, in a case that the first parameter is configured and that simultaneous transmissions on a Physical Uplink Control CHannel (PUCCH) and on a Physical Uplink Shared CHannel (PUSCH) are configured, and acquires a value of the type 2 power headroom for the primary cell, regardless of whether simultaneous transmissions on the Physical Uplink Control CHannel (PUCCH) and on the Physical Uplink Shared CHannel (PUSCH) are configured in a case that the second parameter is configured.

Abstract: A terminal apparatus includes a coding unit configured to divide a transport block into one or more code blocks and generate coded bit(s) by coding the one or more code blocks; and a transmitter configured to transmit the coded bit(s) by using a channel, wherein multiplex bit(s) are given based on at least coupling of the coded bit(s) generated by coding of the one or more code blocks, the coding unit maps the multiplex bit(s) to a matrix in a first-axis prioritized manner and reads the multiplex bit(s) from the matrix in the first-axis prioritized manner or in a second-axis prioritized manner, and whether the first axis or the second axis is prioritized in a case that the multiplex bit(s) are read from the matrix is given based on at least whether a signal waveform applied to a prescribed channel is an OFDM.

Abstract: A terminal apparatus includes a receiver configured to receive a reference signal corresponding to a first subframe set constituted by one or a plurality of subframes and a first physical broadcast channel corresponding to the first subframe set, wherein, the reference signal corresponding to the first subframe set is regarded as transmitted using the same antenna port, and an antenna port used for transmitting the reference signal corresponding to the first subframe set and a first antenna port used for transmitting the first physical broadcast channel corresponding to the first subframe set are regarded as the same antenna port.