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: 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.

Abstract: A terminal apparatus receives a higher layer parameter and a PDSCH, and generates a HARQ-ACK codebook and transmits the generated HARQ-ACK codebook on a PUCCH. In a case that a first parameter is configured, a first HARQ-ACK codebook and a second HARQ-ACK codebook are generated, the first HARQ-ACK codebook is used to transmit a HARQ-ACK bit corresponding to a PDSCH A, and the second HARQ-ACK codebook is used to transmit a HARQ-ACK bit corresponding to a PDSCH B. In a case that the first parameter is not configured, the first HARQ-ACK codebook is generated, and the first HARQ-ACK codebook is used to transmit the HARQ-ACK bit corresponding to the PDSCH B.

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: A terminal apparatus for communicating with a base station apparatus is provided. The terminal apparatus includes a receiver configured to receive a first message from the base station apparatus, and a processing unit configured to establish a second packet data convergence protocol (PDCP) entity with a configuration identical to a configuration of a first PDCP entity for a first signaling radio bearer, based on a fact that a first configuration is configured. The first configuration is configured based on the first message.

Abstract: Provided is a technology related to a terminal apparatus, a base station apparatus, a method, and an integrated circuit capable of reducing complexity of protocol processing, reducing deterioration of phone call quality, and efficiently performing communication. A terminal apparatus for communicating with a base station apparatus includes: a reception unit configured to receive an RRC message from the base station apparatus; and a processing unit configured to configure a packet loss prohibit timer according to a packet loss rate report prohibit timer field included in the RRC message and configured to, based on reception of a report of a packet loss rate from a higher layer and a fact that a packet loss rate report prohibit timer is not running, create a packet loss rate report content, start the packet loss rate report prohibit timer, and perform transmission to the base station apparatus.

Abstract: A terminal apparatus includes a receiver configured to receive data from a base station apparatus, and a processing unit. The processing unit maintains a first state variable in a receiving PDCP entity of the terminal apparatus, and performs processing of, in the maintaining, setting, based on a fact that the data to be received from the base station apparatus is data of an MBS, an initial value of a sequence number part of the first state variable as a first value and setting based on a fact that the data to be received from the base station apparatus is at least not the data of the MBS, the initial value of the first state variable to 0.

Abstract: A terminal apparatus configured with a first cell group and a second cell group includes a processing unit configured to trigger a PHR, and a transmitter configured to transmit the triggered PHR to a base station apparatus. The PHR is triggered by the processing unit, based on activation of the second cell group.

Abstract: A straddled vehicle, including a vehicle body having a rotatable handlebar; a steerable wheel, operation of which is transmitted mechanically to steer the steerable wheel; an actuator configured to apply a steering assisting force to the steerable wheel in accordance with the operation of the handlebar; and a control device configured to control the actuator by outputting a first physical quantity related to the steering assisting force, in accordance with a second physical quantity related to the operation of the handlebar. The control device performs, in response to an external instruction or fulfillment of a condition, setting or changing a dead band, which is a predetermined range of the second physical quantity in which the first physical quantity is not outputted even with the operation of the handlebar, and/or setting or changing an output increasing range in which as the second physical quantity increases, the outputted first physical quantity increases.

Abstract: A terminal apparatus receives a first configuration and a second configuration that are applied to a second cell group and first information. The terminal apparatus performs reconfiguration using the first configuration in a case of receiving a first value as the first information. The terminal apparatus performs reconfiguration using the second configuration in a case of receiving a second value as the first information. The terminal apparatus does not reset MAC and reestablishes RLC in the second cell group in a case of performing reconfiguration based on the first information.

Abstract: A terminal apparatus that communicates with a base station apparatus includes: a reception unit configured to receive a configuration of an initial uplink (UL) bandwidth part (BWP) and a configuration of an additional UL BWP via a radio resource control (RRC) message and receive a random access response (RAR) message including an RAR UL grant; and a transmission unit configured to transmit a physical uplink shared channel (PUSCH) in an active UL BWP, wherein one of the initial UL BWP and the additional UL BWP is activated as the active UL BWP, the PUSCH is scheduled by using the RAR UL grant, a first field included in the RAR UL grant is used to indicate frequency resource allocation of the PUSCH, and whether the first field is to be truncated or whether a bit is to be inserted into the first field is determined based on a bandwidth of the initial UL BWP.

Abstract: A terminal apparatus and a base station apparatus efficiently communicate. A terminal apparatus including a receiver configured to receive an RRC message including first configuration information and to receive DCI on a PDCCH, a determination unit configured to determine a time parameter for transmitting a PUSCH, based on a bit sequence indicated by a first field of the DCI, and a transmitter configured to transmit the PUSCH, based on the time parameter. A relationship between the bit sequence and the time parameter is defined by a first parameter group in a case that a first condition is satisfied and that the first configuration information includes the first parameter group and the relationship between the bit sequence and defined by a second parameter group in a case that a second condition is satisfied and that the first configuration information includes the second parameter group.

Abstract: Provided is a terminal apparatus configured to release, based on receiving, via a DCCH from the base station apparatus, an RRC message including a part of session information of an MBS session, an MBS radio bearer used to receive the MBS session.

Abstract: A terminal apparatus determines whether information (first information) indicating whether a state of a secondary cell group is to be changed based on scg-State is included in the RRC signaling, in a case that the first information is not included in the RRC signaling, the state of the secondary cell group is changed based on whether the scg-State is included in the RRC signaling, and in a case that the first information is included in the RRC signaling, the state of the secondary cell group is not changed based on whether the scg-State is included in the RRC signaling.

Abstract: A terminal apparatus configured with a first cell group and a second cell group includes a detector configured to detect a radio link failure of the first cell group, and a controller configured to initiate a first procedure for reporting the radio link failure of the first cell group. The first procedure is initiated based on transmission in the first cell group and the second cell group not being suspended, the second cell group not being in a first state, and the radio link failure of the first cell group being detected. The first state is a state in which a first BWP is activated in an SpCell of a corresponding cell group, a PDCCH is not monitored in the first BWP, and measurement of channel state information (CSI) for the first BWP is performed.