Abstract: To provide a base station apparatus, a terminal apparatus, and a communication method capable of ensuring high reliability and low latency of URLLC. There are included a receiver configured to detect first and second DCI formats and RRC information, and a transmitter capable of data transmission based on any of a first uplink grant to be available via activation by using a radio resource periodicity included in the RRC information and the first DCI format, a second uplink grant to be available via activation by using the radio resource periodicity included in the RRC information and the second DCI format, and a third uplink grant to be available after detection of the second DCI format, wherein multiple DCI formats are detected, the transmitter performs an override, in a case that the third uplink grant overlaps in a time domain with the second uplink grant, and performs an override, in a case that the first uplink grant overlaps in a time domain with the third uplink grant.

Abstract: A base station apparatus for communicating with a terminal apparatus includes: a controller configured to generate first control information specific to the terminal apparatus and second control information addressed to multiple terminal apparatuses, and a receiver configured to receive an uplink physical channel, wherein the receiver receives data which the terminal apparatus transmits without receiving, in the first control information, control information for uplink grant, the first control information indicates semi-static allocation of a radio resource used for transmission of the data, and the second control information indicates dynamic allocation of the radio resource used for transmission of the data.

Abstract: In a case that a large number of terminal apparatuses that are accommodated by contention-based radio communication technologies share a frequency resource, the number of data signals of the terminal apparatus that are non-orthogonally multiplexed in the spatial domain increases. If terminal apparatuses, of which the number exceeds the number of receive antennas or the spreading factor transmit uplink data at the same time, it is tantamount to a presence of terminal apparatuses using the same spreading code, and inter-user interference becomes a problem.

Abstract: To provide a base station apparatus, a terminal apparatus, and a communication method that enable to secure high reliability and low latency of URLLC. An apparatus includes a receiver configured to detect a DCI format, and a transmitter configured to perform first data transmission based on a first DCI format and second data transmission based on a second DCI format. The receiver detects the first DCI format for the first data transmission in a first CC, and detects the second DCI format for the second data transmission in a second CC. In a case that the first data transmission and the second data transmission overlap in a time domain, and a sum of transmit power of the first data transmission and transmit power the second data transmission exceeds maximum transmit power, the transmitter allocates the transmit power to the first data transmission not to exceed the maximum transmit power.

Abstract: In a case of a contention-based radio communication technique, it is necessary to identify a terminal apparatus that has performed data transmission among terminal apparatuses sharing frequency resources. There is a problem that it is difficult to identify the terminal apparatus that has performed data transmission in a case with a large number of terminal apparatuses that are non-orthogonally spatial multiplexed. Provided is a transmission device for transmitting a data signal to a reception device, the transmission device including: a transmission processing unit configured to transmit the data signal without performing SR transmission or receiving control information of transmission permission transmitted from the reception device; an identification signal multiplexing unit configured to multiplex an identification signal to an orthogonal resource; and a control information receiving unit configured to receive in advance a transmission parameter relating to transmission of the data signal.

Abstract: Proper use of a sparse code prevents PAPR performance from improperly degrading.

Abstract: Included are a receiver configured to receive first downlink data mapped to the first component carrier and second downlink data mapped to the second component carrier; and a transmitter configured to transmit a signal for indicating delivery confirmation of the first downlink data and the second downlink data. A timing to transmit the signal for indicating the delivery confirmation is defined by a prescribed number of time slots, and a length of each of the time slots is configured based on a subcarrier spacing of the first component carrier and a subcarrier spacing of the second component carrier.

Abstract: Depending on whether a transmission scheme is CP-OFDM or DFT-S-OFDM, the same MCS index that is notified is handled as different TBS indexes.

Abstract: To provide a base station apparatus, a terminal apparatus, and a communication method capable of efficiently performing retransmission control for small size data in grant-free multiple access where the base station apparatus accommodates a large number of terminal apparatuses.

Abstract: The present invention relates to a base station apparatus, a terminal apparatus, and a communication method. In a case that Multi-User Superposition Transmission (MUST) is applied, the transmit power for applying 256 QAM is insufficient. MUST is efficiently applied in an environment in which an MCS table including 256 QAM is configured for use. The base station includes an MCS configuration unit configured to hold a first table including MCS indices that include 256 QAM, and a second table not including 256 QAM, and in a case of performing MUST, configure an MCS not including 256QAM for downlink data of the second terminal, and a PDSCH generating unit configured to generate, by use of MUST, downlink data of the first terminal and downlink data of the second terminal that are generated based on the MCS indices configured.

Abstract: A terminal apparatus includes a control information detection unit configured to detect first and second DCI, and a transmitter configured to perform UL data transmission based on the first DCI or cancel a resource allocated in the second DCI. A UL grant using the first DCI is detected, when performing UL data transmission based on the UL grant, after the data transmission, a first timer for a corresponding HARQ process is started and a second timer is stopped, and when the first timer expires, the second timer for a HARQ process is started. When cancellation of the UL data transmission using the second DCI is detected, at a timing for the data transmission canceled, the second timer is restarted in a case that the first timer expires and the second timer is running, and the second timer is started in a case that the second timer is not running.

Abstract: In a case that an uplink timing alignment timer expires, Type 1 configured uplink grants configured in all serving cells belonging to a TAG associated with the uplink timing alignment timer are suspended. A random access response including a timing advance command configured for the TAG is received. In a case that a random access preamble included in the random access response is not a contention based random access preamble, or in a case that the random access response includes the contention based random access preamble and includes information indicating successful random access contention resolution, and the timing alignment timer associated with the TAG is not running, the Type 1 configured uplink grants configured and suspended in the all serving cells belonging to the TAG are re-initialized.

Abstract: Motor device includes: motor part including armature shaft; speed reduction mechanism which includes worm and worm wheel and outputs the rotation of the armature shaft at reduced speed; gear case which is provided with bottom part and opening part and accommodates the worm and worm wheel in rotatable manner; gear cover which covers the opening part of the gear case; circuit board which is arranged between the speed reduction mechanism and the gear cover; and board cover which is arranged between the circuit board and the speed reduction mechanism. The board cover is provided with positioning protrusion part protruding toward the gear case, the gear case is provided with positioning recess part into which the positioning protrusion part is press-fit, and the bottom surface of the positioning recess part and the tip surface of the positioning protrusion part press-fit into the positioning recess part face each other with gap therebetween.

Abstract: To provide a base station apparatus, a terminal apparatus, and a communication method capable of ensuring high reliability of URLLC using a scheduled access.

Abstract: In a case that multiple configured uplink grants are configured in a single serving cell, there is a problem that normal communication cannot be performed unless appropriate control is performed to prevent transmissions in a radio resource (slot) of the same timing. A mobile station apparatus in a communication system including at least a base station apparatus and the mobile station apparatus for which the base station apparatus allocates a normal uplink and a supplementary uplink in a single serving cell, wherein the mobile communication apparatus is configured to configure a configured uplink grant individually for each of the normal uplink and the supplementary uplink, and validate, in a case that the serving cell is activated, one of the configured uplink grant configured for the normal uplink and the configured uplink grant configured for the supplementary uplink and suspend another one.

Abstract: There is a concern that communication failure may occur in a case that the state of a serving cell is not properly managed during communication of SPS or GF. A mobile station apparatus of a communication system including at least a base station apparatus and a mobile station apparatus configured to perform communication by using carrier aggregation that simultaneously uses multiple serving cells configured by the base station apparatus according to an aspect of the present invention, wherein the mobile station apparatus restarts a deactivation timer of a serving cell of the multiple serving cells at a timing indicated by a configured uplink grant configured for the serving cell.

Abstract: A terminal apparatus for communicating with a base station apparatus, the terminal apparatus including: a receiver configured to receive control information; and a transmitter configured to perform data transmission in accordance with the control information, wherein the receiver receives at least RRC and DCI, the RRC includes configuration of a target received power, a fractional TPC, and an index of a closed loop TPC to be used for PUSCH transmission, and information for indicating at least a target received power, a fractional TPC, and an index of a closed loop TPC as parameters for transmission power control to be switched depending on the DCI, and in a case that the DCI for indicating switching of a transmission power value is detected, a transmission power used for data transmission is caused to be different from a transmission power value calculated using parameters notified as the parameters for transmission power control to be switched.

Abstract: A terminal apparatus using large FFT points transmits a reference signal such that short OFDM symbols are repeated.

Abstract: A terminal apparatus for communicating with a base station apparatus, the terminal apparatus including: a radio receiving unit configured to receive a PDCCH for uplink transmission; a controller configured to decode the PDCCH; and a transmitter configured to transmit a PUSCH including semi-persistent CSI, wherein the controller receives a PDCCH including a CRC scrambled with an SP-CSI RNTI, the PDCCH includes at least a field related to an HARQ process number, and the controller validates the PDCCH in a case that at least the field related to the HARQ process number is a prescribed value.

Abstract: A state managing unit configured to control a prescribed communication resource allocating process and a reception processing unit configured to receive a control element (CE) are included. The prescribed communication resource allocating process is a process of allocating a communication resource at a predetermined time interval, and the state managing unit suspends an uplink grant configured for the prescribed communication resource allocating process in a case that the reception processing unit receives an SCell Activation/Deactivation MAC CE for deactivating a secondary cell, or an sCellDeactivationTimer configured for the secondary cell expires, and the state managing unit reinitializes the uplink grant suspended, in a case that the reception processing unit receives the SCell Activation/Deactivation MAC CE for activating the secondary cell after the state managing unit suspends the uplink grant.