Abstract: A base station apparatus for communicating with a terminal apparatus transmits a Radio Resource Control (RRC) connection reconfiguration request message including a Data Radio Bearer (DRB) configuration to the terminal apparatus. The DRB configuration includes a DRB identity and a Packet Data Convergence Protocol Layer (PDCP) entity configuration corresponding to the DRB identity. PDCP entity configuration information includes one of a PDCP entity configuration for Evolved Universal Terrestrial Radio Access (E-UTRA) and a PDCP entity configuration for New Radio (NR). A PDCP entity is established in accordance with the PDCP entity configuration information.

Abstract: A terminal apparatus includes: a reception unit which receives, from a base station apparatus, a physical downlink control channel including downlink control information in a search space specific to the terminal apparatus; and a control unit which determines the number of bits of a time domain resource allocation field in the downlink control information. The time domain resource allocation field is a time domain resource allocation field for a physical downlink shared channel. A default table indicates a time domain resource allocation configuration for the physical downlink shared channel. When a parameter is not received, the number of bits of the time domain resource allocation field is determined based on the number of the in the default table.

Abstract: A terminal apparatus for communicating with a base station apparatus by using a direct path and an indirect path determines whether a signaling radio bearer is configured on an indirect path in a case that radio link failure is detected on the direct path, and transmits information indicating that the radio link failure has occurred on the direct path via the signaling radio bearer in a case that the signaling radio bearer is determined to be configured on the indirect path.

Abstract: A terminal apparatus for communicating with a base station apparatus by using a direct path and an indirect path determines whether a signaling radio bearer is configured on the indirect path in a case that radio link failure is detected on the direct path and the signaling radio bearer is not configured with a split bearer, and a transmitter transmits information indicating that the radio link failure has occurred on the direct path via a sidelink signaling radio bearer configured between the terminal apparatus and the relay terminal apparatus in a case that the signaling radio bearer is determined to not be configured on the indirect path.

Abstract: A terminal apparatus for communicating with a base station apparatus by using a direct path and an indirect path determines whether a signaling radio bearer is configured on the direct path in a case that radio link failure is detected on the indirect path and a signaling radio bearer is not configured with a split bearer, and transmits, via the signaling radio bearer, information indicating that the radio link failure has occurred on the indirect path in a case that the signaling radio bearer is determined to be configured on the direct path.

Abstract: A terminal apparatus includes, a first reception unit configured to receive a first synchronization signal with a first subcarrier spacing, a second reception unit configured to receive a second synchronization signal with the first subcarrier spacing, a detection unit configured to detect an identity from the first synchronization signal and/or the second synchronization signal, and a third reception unit configured to receive a first reference signal, based on the identity, with a second subcarrier spacing different from the first subcarrier spacing, wherein, the first reference signal is arranged in a time resource and a frequency resource predetermined for the second subcarrier spacing.

Abstract: A leaning vehicle including a vehicle body frame that is configured to lean leftward and rightward respectively when the leaning vehicle is turning left and right, a steerable wheel supported by the vehicle frame body, a steering mechanism steering the steerable wheel, and a posture control actuator device. The posture control actuator device includes a posture control actuator that outputs power to control posture of the vehicle body frame, and an angular rate sensor that detects an amount of change per unit time of a rotation angle of the vehicle body frame around a rotation axis thereof, the rotation angle changing as the vehicle body frame is rotating around the rotation axis. The posture control actuator device is supported by the vehicle body frame, and is attachable to and detachable from the vehicle body frame. The posture control actuator and the angular rate sensor are not displaceable relative to each other.

Abstract: A terminal apparatus in communication with a base station apparatus includes a receiver configured to receive, from the base station apparatus, a message related to Radio Resource Control (RRC) connection reconfiguration, and a processing unit. The processing unit determines, based on information included in the message related to the RRC connection reconfiguration, a DRB to which a DAPS is to be applied and a DRB to which the DAPS is not to be applied, and associates, with a target primary cell, an RLC entity and a DTCH logical channel for the DRB to which the DAPS is not to be applied.

Abstract: A terminal apparatus includes: a transmitter configured to transmit a first message for requesting resume from an inactive state to a connected state; a receiver configured to receive a second message that includes priority information for cell selection (first information) and indicates a transition to an idle state (release of connection); and a controller configured to store the first information, in which the controller determines, based on whether or not a transition from an inactive state to an idle state is triggered by reception of the second message, in a case of storing the first information, whether to store or discard the first information.

Abstract: To efficiently transmit CSI. A receiver configured to receive a physical downlink control channel for conveying downlink control information including a first information field and a transmitter configured to report channel state information (CSI) are included, wherein the first information field indicates first information, the first information indicates one of multiple states, each of the multiple states is associated with a configuration related to one or multiple CSI reports and a configuration related to one or multiple CSI resources, and the one of the multiple states is configured to be associated with a first serving cell and a bandwidth part (BWP) of the first serving cell.

Abstract: A terminal apparatus includes: a processing unit configured to determine, in a case that the terminal apparatus requests re-establishment of an RRC connection, whether or not the terminal apparatus is configured with NGEN-DC, release, in a case that the terminal apparatus is configured with NGEN-DC, an NR secondary cell group, and release, in the release of the NR secondary cell group, an RLC entity for an RLC bearer configured for the NR secondary group.

Abstract: A terminal apparatus for communicating with a base station apparatus by using a second cell group including a PSCell considers a measurement object including first information as a first measurement object group, considers a measurement object not including the first information as a second measurement object group, and based on the second cell group being in a deactivated state, does not measure the first measurement object group or measures the first measurement object group in accordance with a relaxed requirement.

Abstract: A terminal apparatus of the present invention receives setting of an initial DL BWP by using an RRC message, the setting of the initial DL BWP comprises setting a first parameter and a second parameter of a CORESET #0, a value of an identifier of the CORESET #0 is 0, the first parameter represents the size of the CORESET #0, and the second parameter represents the size of the initial DL BWP. The terminal apparatus of the present invention receives a DCI format that schedules a PDSCH in an active DL BWP, and identifies, based on a field in the DCI format, a resource block set to which the PDSCH is allocated. A value of the field is determined based on the size of the DL BWP, the start resource block, and the number of consecutively allocated resource blocks. The size of the DCI format in a USS is determined based on the size of the CORESET #0, and when the field is applied to the active DL BWP, the size of the DL BWP is the size of the CORESET #0.

Abstract: A terminal apparatus that communicates with one or multiple base station apparatuses includes: a receiver configured to receive an RRC connection reconfiguration message including a DRB configuration from a base station apparatus of the one or multiple base station apparatuses; and a processing unit configured to associate an DRB that is established with an EPS bearer identity included in information of a DRB configuration in a case that information indicating that a full configuration is applied is included in the RRC connection reconfiguration message received by the receiver, a DRB identity included in the information of the DRB configuration is not present in a part of a current configuration of the terminal apparatus, and an LTE PDCP entity is established in the DRB that is established and has the DRB identity.

Abstract: A terminal apparatus for communicating with a base station apparatus by using a second cell group including a PSCell switches an Active DL BWP in the PSCell to a first active downlink BWP, based on deactivation of the second cell group, and performs radio link monitoring by using a reference signal for radio link monitoring configured for the first active downlink BWP.

Abstract: A terminal apparatus includes: a reception unit configured to receive an RRC reconfiguration message including a DRB configuration and a processing unit, wherein the processing unit establishes an SDAP entity based on conditions that a DRB identity included in the DRB configuration is not part of a configuration of the terminal apparatus, an SDAP configuration is included in the DRB configuration, and an SDAP entity corresponding to a PDU session information element included in the SDAP configuration does not exist, and indicates establishment of a user-plane resource for a PDU session to an upper layer based on an additional condition that the SDAP entity corresponding to the PDU session information element does not exist before the RRC reconfiguration message is received.

Abstract: A base station apparatus for communicating with a terminal apparatus transmits a Radio Resource Control (RRC) connection reconfiguration request message including a Data Radio Bearer (DRB) configuration to the terminal apparatus. The DRB configuration includes a DRB identity and a Packet Data Convergence Protocol Layer (PDCP) entity configuration corresponding to the DRB identity. PDCP entity configuration information includes one of a PDCP entity configuration for Evolved Universal Terrestrial Radio Access (E-UTRA) and a PDCP entity configuration for New Radio (NR). A PDCP entity is established in accordance with the PDCP entity configuration information.

Abstract: Provided is a method applied to a terminal apparatus for communicating with a base station apparatus. The method includes the steps of: receiving a first RRC message including a parameter related to a first cell group from the base station apparatus; and transmitting a random access preamble in an SpCell of the first cell group, based on reception of the first RRC message. The random access preamble is transmitted in the SpCell, based on first information being included in the first RRC message and a time alignment timer, in a primary TA group of the first cell group, which is not running.

Abstract: A terminal apparatus for communicating with a base station apparatus, the terminal apparatus including: a receiver configured to receive, from the base station apparatus, an RRC message including an EHC configuration; and a processing unit. The processing unit configures an EHC protocol in accordance with the EHC configuration, and adds a context identifier to data in processing of the EHC protocol, and indicates, in a case that the context identifier is a particular value, that an Ethernet header of the data is uncompressed.

Abstract: In a case of using one PDCP entity to communicate with a source cell and a target cell, a terminal apparatus associates, with the PDCP, a radio bearer of the source cell and a radio bearer of the target cell that are associated with an identical EPS bearer identity, and the PDCP manages two keys.