Abstract: A terminal device (UE) includes a reception unit configured to monitor an enhanced physical downlink control channel (EPDCCH) on a Serving cell with frame structure type 3. In a case that the terminal device detects downlink control information (DCI) in a subframe, the terminal device assumes a configuration of OFDM symbols according to a field in the DCI in the subframe. The OFDM symbols are used for downlink transmission. A demodulation reference signal (DMRS) associated with the EPDCCH is mapped in the subframe according to the configuration of the OFDM symbols.

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 search space of a control channel which is monitored by a terminal is determined based on a first uplink-downlink configuration specific to a base station, a second uplink-downlink configuration specific to a terminal, and one or more EPDCCH subframe configuration, for each subframe. A scrambling sequence parameter which corresponds to the search space of the control channel and is used in scrambling of the control channel is switched. The terminal switches the scrambling sequence parameter, corresponding to the search space and a subframe configuration, and the terminal receives a DMRS and descrambles an EPDCCH by using the switched scrambling sequence parameter.

Abstract: A cell using an unallocated frequency band or a shared frequency band is efficiently controlled. A terminal device includes a reception unit configured to receive a first downlink physical channel mapped on the basis of a first possible starting position of a downlink transmission and a second downlink physical channel mapped on the basis of a second possible starting position of the downlink transmission. Upon the first possible starting position and the second possible starting position being indicated by a higher layer, the reception unit receives, in a predetermined subframe, either one of the first downlink physical channel or the second downlink physical channel, on a secondary cell having a frame structure type 3.

Abstract: Provided are a terminal device, a base station device, and a method that make it possible to communicate efficiently in a communication system in which a base station device and a terminal device communicate. The terminal device communicates with the base station device and is provided with a higher layer processing unit that expands a Ci field based on a MAC CE when a secondary cell list is expanded via RRC signalling.

Abstract: In a radio communication system in which a supplemental uplink-downlink configuration can be used, a mobile station device and a base station device efficiently communicate with each other. A mobile station device communicates in prescribed bands. This mobile station device transmits information related to support of a specific uplink-downlink configuration.

Abstract: A cell using an unallocated frequency band or a shared frequency band is efficiently controlled. A terminal device includes a reception unit configured to receive a physical downlink control channel (PDCCH) in a secondary cell having a frame structure type 3. Upon the terminal device detecting, in the secondary cell having the frame structure type 3, the PDCCH having downlink control information (DCI) in a subframe n, the terminal device assumes a configuration of occupied OFDM symbols in the secondary cell in accordance with a field in the DCI detected in the subframe n.

Abstract: A terminal device (UE) includes a reception unit configured to monitor multiple enhanced physical downlink control channels (EPDCCHs) on a Secondary cell. In a case that the Secondary cell is a licensed assisted access Secondary cell and a higher layer parameter of the Secondary cell indicates that a starting position of downlink transmission is either a Subframe boundary or a slot boundary, the terminal device is configured to monitor both a first set of UE-specific search space candidates in a first EPDCCH and a second set of UE-specific search space candidates in a second EPDCCH, in a subframe. A starting symbol for the first EPDCCH is specified by an index in a first slot in the subframe. A starting symbol for the second EPDCCH is specified by the index in a second slot in the subframe.

Abstract: A cell using an unallocated frequency band or a shared frequency band is efficiently controlled. A terminal device includes a reception unit configured to monitor a physical downlink control channel (PDCCH) in a secondary cell having a frame structure type 3. In the secondary cell having the frame structure type 3, upon a first possible starting position of a downlink transmission and a second possible starting position of the downlink transmission being indicated by a higher layer, the terminal device monitors both a first set of candidates for the PDCCH and a second set of candidates for the PDCCH in a predetermined subframe. The first set of candidates is assumed to start on the basis of the first possible starting position, and the second set of candidates is assumed to start on the basis of the second possible starting position.

Abstract: There is provided a terminal device capable of efficiently performing communication in a communication system in which a base station device and the terminal device communicate with each other. The terminal device that communicates with the base station device by using a plurality of aggregated cells recognizes that a serving cell is stopped in a first state, recognizes that the serving cell is started in a second state, and switches from the first state to the second state based on a received PDCCH.

Abstract: In order to perform efficient communications, provided is a terminal device configured to communicate with a base station device. The terminal device includes: a reception unit configured to receive a higher layer signal including a configuration relating to a physical uplink shared channel (PUSCH); a scrambling sequence generator configured to, if the terminal device supports a capability relating to low complexity and/or coverage enhancement, apply the same scrambling sequence to the PUSCH during a certain period; and a transmission unit configured to transmit the PUSCH, on the basis of the number of repetitions in the configuration relating to the PUSCH.

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: To efficiently control a cell by using a non-allocated frequency band or a shared frequency band. A terminal device includes a transmission unit configured to transmit a PUSCH and a CCA check unit configured to perform LBT before a subframe for which a transmission of the PUSCH is indicated. The terminal device determines start time of the LBT, based on start time of the transmission of the PUSCH, a CCA slot length, and the number of CCA checks. The terminal device includes a reception unit configured to receive a PDCCH. The number of CCA checks is indicated on the PDCCH.

Abstract: To efficiently control a cell by using a non-allocated frequency band or a shared frequency band. The terminal device includes a reception unit configured to receive a PDCCH, a transmission unit configured to transmit a PUSCH in a serving cell, and a CCA check unit configured to perform either first LBT for performing a CCA check a number of times based on a random number before a subframe for which a transmission of the PUSCH is indicated or second LBT for performing a CCA check only once. The terminal device switches between the first LBT and the second LBT, based on a prescribed condition.

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: There is provided a terminal device that communicates with a base station apparatus. The terminal device includes means for setting a maximum output power value in uplink transmission to a first serving cell group based on a maximum output power value of the terminal device and an output power value for the first serving cell group in a case where the uplink transmission to the first serving cell group overlaps with uplink transmission to a second serving cell group in a certain timing, and means for setting a maximum output power value in the uplink transmission to the second serving cell group based on the maximum output power value of the terminal device, the output power value for the first serving cell group and a value for guaranteeing the uplink transmission to the first serving cell group.

Abstract: A cell where an Unlicensed spectrum or shared spectrum is used is efficiently controlled. A terminal device includes a measurement unit configured to measure Channel State Information (CSI) based on a valid downlink subframe based on a Serving cell. A subframe is considered to be the valid downlink subframe in a case that a condition is met, the condition includes that a configured CSI Reference Signal (CSI-RS) resource associated with a Channel State Information process exists in the subframe, and the Serving cell is a Licensed-Assisted Access (LAA) Secondary cell.

Abstract: The present invention enables accurate measurement of RSRP, RSRQ, and the like in an LAA cell. Provided is a terminal device including: a higher layer processing unit for which a physical quantity configuration (quantityConfig) and Measurement objects are configured; and a measurement unit configured to perform measurement of a first frequency and a second frequency based on the physical quantity configuration and the Measurement objects. The physical quantity configuration at least includes a first filtering coefficient used for the measurement for the first frequency and a second filtering coefficient used for the measurement for the second frequency.

Abstract: There is provided a terminal device that communicates with a base station apparatus. The terminal device includes a transmission unit that configures a transmit power for transmission of a physical uplink shared channel in a serving cell belonging to a first cell group based on whether or not a physical random access channel is transmitted in the first cell group and a second cell group in a case where the first cell group and the second cell group are configured.