Abstract: A terminal apparatus receives higher layer signaling and a PDCCH. The higher layer signaling includes an RRC parameter for indicating a slot in which the PDCCH is to be monitored. The PDCCH includes slot structure information. The slot structure information indicates a slot structure for a slot n next to a slot in which the PDCCH is received. The terminal apparatus controls whether or not to monitor a PDCCH in the slot n, based on at least the RRC parameter and the slot structure information.

Abstract: The terminal apparatus receives a PHICH and a PDCCH, and in a case that transmission of a transport block corresponding to a first HARQ process and transmission of a transport block corresponding to a second HARQ process, each having a different processing time from reception of the PDCCH to transmission of a PUSCH, occur in an identical uplink subframe, an ACK is set as a state variable HARQ_FEEDBACK of the first HARQ process.

Abstract: To efficiently transmit channel state information. A terminal apparatus includes a receiver configured to receive information for configuring a first mode and information for configuring a second mode and receive an UL grant to be used for scheduling of a PUSCH and an UL grant to be used for scheduling of a sPUSCH; and transmits CSI on the PUSCH by using the first mode, based on the UL grant to be used for scheduling of the PUSCH, and transmits CSI on the sPUSCH by using the second mode, based on the UL grant to be used for scheduling of the sPUSCH.

Abstract: A terminal apparatus includes a receiver configured to monitor a PDCCH with a DCI format on an active downlink BWP in a serving cell in a Secondary Cell Group (SCG), the DCI format being used for scheduling a PDSCH, and receive the PDSCH on the downlink BWP, and a transmitter configured to transmit a HARQ-ACK on a PUCCH.

Abstract: A terminal apparatus includes a transmitter configured to transmit capability information of the terminal apparatus, and a receiver configured to perform blind detection of a PDCCH from a search space in a control resource set, wherein in a case that a capability of blind detection is supported, the blind detection detecting the PDCCH from search spaces in control resource sets the number of which is greater than a prescribed number in a prescribed duration, the transmitter transmits, as the capability information of the terminal apparatus, at least two of pieces of information including (a) a maximum number of blind detections that can be performed in the prescribed duration, (b) a maximum number of blind detections in a unit time, (c) a maximum number of blind detections based on configuration for the control resource set, and (d) a maximum number of the control resource sets for which blind detections can be simultaneously performed.

Abstract: A terminal device for performing communication method, the terminal device comprising a receiver for receiving a PDCCH having a first DCI format; and a transmitter for transmitting a PUCCH including UCI, and a PUSCH. The transmitter multiplexes the UCI onto a first PUSCH dynamically scheduled via the first DCI format when the PUCCH conflicts with a first plurality of PUSCHs including the first PUSCH and a second PUSCH for semi-permanently transmitted CSI, and multiplexes the UCI onto a third PUSCH for aperiodically transmitted CSI when the PUCCH conflicts with the third PUSCH.

Abstract: An object of the present invention is to protect the communication of a legacy terminal while achieving favorable communication by rendering the CCA level of a CCA-variable terminal apparatus variable in an environment, premised on CSMA/CA, where the CCA-variable terminal apparatus and a legacy terminal apparatus coexist. A terminal apparatus for performing wireless communication with a base station apparatus includes: a receiving unit that receives a radio signal transmitted from the base station apparatus; a CCA-variable channel information processing unit that acquires first CCA-variable channel instruction information contained in the radio signal and containing information regarding a range of a CCA level that is available on a certain channel and that is used for clear channel assessment; and a higher layer unit that selects, according to the first CCA-variable channel instruction information, a channel to be used.

Abstract: A base station which communicates with a user equipment (UE) is described. The RRC configuration information may indicate that a maximum number of codewords scheduled by DCI is two. The base station may comprise transmitting circuitry configured to, after a channel access procedure, transmit, to the UE, a PDSCH which contains only a first transport block. The base station may further comprise receiving circuitry configured to receive, from the UE, a HARQ-ACK feedback including at least a first HARQ-ACK information bit and a second HARQ-ACK information bit. The first HARQ-ACK information bit may correspond to the first transport block of the PDSCH. The second HARQ-ACK information bit may be set to NACK. A contention window for the channel access procedure may be adjusted using the HARQ-ACK feedback, wherein the second HARQ-ACK information bit may be ignored.

Abstract: In a case that transmission of a PUSCH is transmission of the PUSCH in a 2 step contention based random access procedure, the complex-valued symbol is not mapped to the resource element of last one or more prescribed SC-FDMA symbols in the prescribed subframe, and in a case that the transmission of the PUSCH is not the transmission of the PUSCH in the 2 step contention based random access procedure and a first field (PUSCH ending symbol) included in downlink control information for indicating the transmission of the PUSCH indicates 1, the complex-valued symbol is not mapped to the resource element of a last SC-FDMA symbol in the prescribed subframe.

Abstract: A method for a base station which communicates with a user equipment (UE) in a bandwidth including a plurality of channel access sub-bands in a serving cell is described. The method may comprise sensing each of the plurality of the channel access sub-bands. The method may also comprise transmitting downlink signal after sensing. A counter and a contention window size may be managed per sub-band for channel access.

Abstract: A terminal apparatus includes a receiver configured to receive a physical downlink shared channel and a transmitter configured to multiplex first channel state information having a higher priority than second channel state information with the second channel state information and an HARQ-ACK and to transmit the first channel state information, the second channel state information and the HARQ-ACK multiplexed, by using a physical uplink control channel resource.

Abstract: A communication method used by a terminal apparatus includes the step of separately generating first coded bits fk of a transport block, second coded bits q0 of control information, and third coded bits q1 of a rank indicator, and multiplexing the first coded bits fk and the second coded bits q0 to generate multiplexed bits gk, and the step of multiplexing the multiplexed bits gk and the third coded bits q1 to generate a first sequence hk, wherein the position where the third coded bits q1 are mapped is given at least based on a part of a first condition, a second condition, and a third condition, the first condition is whether a search space detecting the PDCCH is a CSS or a USS, the second condition is which RNTI is used to scramble CRC parity bits attached to the DCI format, and the third condition is whether the first method or the second method is used for the first coded bits.

Abstract: A terminal apparatus in an initial access calculates, from the RSRP of the SS block, a downlink path loss used for transmission power of the PRACH, and determines a reference used for the downlink path loss used for transmission power of a first PUSCH scheduled by a random access response grant, based on system information included in the random access response grant, wherein the system information further includes a first parameter for indicating a subcarrier spacing for the first PUSCH and a second parameter for indicating a signal waveform for the first PUSCH.

Abstract: A radio communication apparatus that is a transmission opportunity holder efficiently transmits an instruction of frame transmission, to multiple terminal apparatuses. A radio communication apparatus of the present invention includes a transmission unit configured to transmit a first frame to obtain a TXOP, transmit a Trigger frame providing an instruction of transmission of a second frame addressed to the radio communication apparatus itself, to at least one of the multiple terminal apparatuses in the TXOP, and transmit a third frame addressed to at least one of the multiple terminal apparatuses in the TXOP. A value indicating a TXOP that is written in the second frame and that the third frame is to obtain is different from a value obtained by dividing a value indicating the TXOP written in the first frame by a value indicating a duration elapsed from start of transmission of the first frame to communication completion of the second frame.

Abstract: A terminal apparatus capable of efficiently performing uplink and/or downlink communication is provided. With respect to communication related to transport blocks and code block groups, in a case that a PDSCH and/or a PUSCH is scheduled by a PDCCH detected in a common search space CSS, an operation applied to a transmission process includes a prescribed operation regardless of a prescribed condition and first configuration information. In a case that the PDSCH and/or the PUSCH is scheduled by the PDCCH detected in a UE-specific search space USS, the operation applied to the transmission process is provided, based at least on the prescribed condition and/or the first configuration information.

Abstract: A method for a base station which communicates with a user equipment (UE) is described. The method may comprise sending first radio resource control (RRC) configuration information. The first RRC configuration information may indicate code block group (CBG) transmission for a Physical Downlink Shared Channel (PDSCH). The method may also comprise sending second RRC configuration information. The second RRC configuration information may indicate Nmax which is a maximum CBGs per transport block. The method may further comprise, after a channel access procedure, transmitting, to the UE, a PDSCH containing a transport block with N CBG(s). N is an integer. The method may further comprise receiving, from the UE, a HARQ-ACK feedback including Nmax HARQ-ACK information bits for the transport block of the PDSCH. If N is smaller than Nmax, the HARQ-ACK information bit(s) for last Nmax-N CBG(s) may be set to NACK.

Abstract: A terminal apparatus includes a receiver configured to monitor a search space set of a control resource set. A physical downlink control channel (PDCCH) candidate to be monitored is allocated to the search space set, based at least on a maximum number CPDCCHmax, slot of non-overlapped control channel elements (CCEs) expected to be monitored by the terminal apparatus in a slot. In a case that the control resource set satisfies at least one of multiple conditions, the CCE is a CCE of the non-overlapped CCEs. The multiple conditions include a condition where the CCE corresponds to different types of the search space set.

Abstract: A decrease in access rate to a wireless medium caused by an exposed terminal apparatus is improved. A wireless communication apparatus of the present invention includes a reception unit that receives a frame indicating start of a medium protection operation, and acquires, from the frame indicating the start of the medium protection operation, BSS identification information for identifying a BSS to which a transmission-source wireless communication apparatus of the frame indicating the start of the medium protection operation belongs, and a transmission unit that determines whether or not to start a transmission operation of a frame addressed to another wireless communication apparatus belonging to a BSS to which the wireless communication apparatus belongs based on the BSS identification information.

Abstract: A method that carries out uplink multiple access while reducing complexity in processing accompanying exchange of control information. A terminal device that performs uplink multiple access communication includes a reception unit that receives a frame including uplink multiple access connection information, a first autonomous decentralized control unit that instructs securing time of a wireless resource, and a second autonomous decentralized control unit that instructs securing time of a wireless resource after reception of a frame including the uplink multiple access connection information. The terminal device is instructed securing time of the wireless resource by the first autonomous decentralized control unit in a case that a frame including the uplink multiple access connection information is not received. Securing time of the wireless resource is instructed by the second autonomous decentralized control unit in a case that a frame including the uplink multiple access connection information is received.

Abstract: Communication can be efficiently performed. In a case that a terminal apparatus is configured to monitor a first PDCCH candidate in a CSS and a second PDCCH candidate in a USS according to a DCI format accompanied with a C-RNTI in one non-interleaved CORESET having a period of one OFDM symbol, an aggregation level of the first PDCCH candidate is 8, an aggregation level of the second PDCCH candidate is 16, a lowest index of a CCE constituting the first PDCCH candidate is the same as a lowest index of a CCE constituting the second PDCCH candidate, a higher layer parameter PDCCH-DMRS-Scrambling-ID is not configured for the CORESET, and a size of the DCI format corresponding to the first PDCCH candidate is the same as a size of the DCI format corresponding to the second PDCCH candidate, it is considered that the DCI format is transmitted only in the first PDCCH candidate.