Abstract: A user equipment (UE) is described. The UE includes reception circuitry configured to receive, from a base station, a physical downlink control channel (PDCCH) with a downlink control information (DCI) format with cyclic redundancy check (CRC) scrambled by TC-RNTI; and transmission circuitry configured to transmit, to the base station, a physical uplink shared channel (PUSCH) with a repetition number wherein the PUSCH is scheduled by the DCI format, a field of modulation and coding scheme (MCS) in the DCI format is reduced by one or more bits, and the one or more bits of the MCS field is used to indicate the repetition number for the PUSCH.

Abstract: A user equipment (UE) is described. The UE includes transmission circuitry configured to transmit, to a base station, a random access preamble with a random access preamble identifier (RAPID) in a physical random access channel (PRACH) occasion; and reception circuitry configured to receive, from the base station, a random access response (RAR), wherein the RAR contains a MAC subPDU with a RAPID corresponding to the transmitted preamble, the MAC subPDU provides a RAR uplink (UL) grant, a fixed 4 bit field of modulation and coding scheme (MCS) in the RAR UL grant is reduced by one or more bits, and the one or more bits of the MCS field is used to indicate a repetition number of a PUSCH scheduled by the RAR UL grant; and transmission circuitry further configured to transmit the PUSCH with the repetition number.

Abstract: A method by a user equipment (UE) is described. The method includes receiving, from a base station, system information including physical random access channel (PRACH) configuration information, wherein the PRACH configuration information includes a list of preamble index ranges, where each preamble index range is associated with a synchronization signal block (SSB), wherein each preamble index range comprises one or a plurality of sub-ranges; and selecting, based on one or a plurality of reference signal received power (RSRP) values of a set of SSBs and a first RSRP threshold configured by a radio resource control (RRC) layer, an SSB from the set of SSBs; and selecting, based on the RSRP value associated with the selected SSB and one or more second RSRP thresholds configured by the RRC layer, a subrange from the one or a plurality of sub-ranges associated with the selected SSB; and selecting a preamble index from the selected sub-range.

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 user equipment (UE) is described. The UE includes reception circuitry configured to receive, from a base station, a first radio resource control (RRC) parameter related to a search space set configuration, wherein the first RRC parameter includes one or more second RRC parameters, indicating a number of monitoring occasions R associated to each DCI; and monitoring circuity configured to monitor, based on the first RRC parameter, a set of PDCCH candidates for the search space set.

Abstract: A method performed by a base station (BS) is provided. The method receives, from a user equipment (UE), a message indicating that the UE is capable of performing a conditional handover. The method then transmits, to the UE, a set of one or more conditional handover configurations. Each conditional handover configuration in the set of conditional handover configurations includes information associated with a corresponding candidate cell, and a handover condition comprising a measurement event based on a signal quality of at least one of a serving cell and the corresponding candidate cell.

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 method by a user equipment (UE) is described. The method includes transmitting, to a base station, a first radio resource control (RRC) parameter indicating first zero power channel state information reference signal (ZP CSI-RS) resource sets and a second RRC parameter indicating second ZP CSI-RS resource sets, and to receive a DCI format scheduling a physical downlink shared channel (PDSCH); and performing the PDSCH rate matching around unavailable resource elements (REs) for the PDSCH. The one or more REs of the PDSCH overlapped with REs of the first ZP CSI-RS resource sets or REs of the second ZP CSI-RS resource sets are determined as available REs or not available for the PDSCH at least based on the one, more or all of the first RRC parameter, the second RRC parameter, the DCI format type, and/or a DCI trigger field in the DCI format.

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: 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 communication system includes a terminal apparatus and a base station apparatus. The terminal apparatus communicates with a base station apparatus by carrier aggregation using a plurality of serving cells, where each of the plurality of serving cells has a different frequency. In addition, the terminal apparatus removes a measurement identity relevant to a serving cell of the plurality of serving cells based on that the serving cell was removed.

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 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: 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 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 user equipment (UE) is described. The UE includes reception circuitry configured to receive, from a base station, a first radio resource control (RRC) parameter related to a search space set configuration, wherein the first RRC parameter includes a plurality of second RRC parameters for a list of combinations, each of the second RRC parameters indicates a number of PDCCH candidates associated with a combination; and control circuitry configured to determine, based on the first RRC parameter, the number of PDCCH candidates for the search space set, and to monitor the PDCCH candidates determined by the number of PDCCH candidates.

Abstract: A user equipment (UE) is described.

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 user equipment (UE) is described. The UE includes reception circuitry configured to receive, from a base station, PDCCH with a first DCI format scheduling PUSCH repetitions, and a RRC parameter indicating slot format per slot, and control circuitry configured to determine, based on the first DCI format and the RRC parameter, multiple PUSCH transmission occasions with a first number for transmission of the PUSCH repetitions, wherein in a case that one or more symbols of a PUSCH transmission occasion in a slot overlap with one or more symbols indicated as downlink symbol by the RRC parameter, the PUSCH transmission occasion is not included in the multiple PUSCH transmission occasions for transmission of the PUSCH repetitions, and transmission circuitry further configured to transmit the PUSCH repetitions in the multiple PUSCH transmission occasions.

Abstract: Provided are a method executed by user equipment (UE), UE, and a base station. The method includes: receiving from the base station a first Radio Resource Control (RRC) message containing a handover command; storing a handover configuration included in the first RRC message; and managing the handover configuration. Before receiving the RRC message containing the handover command, the UE still maintains communication with a source base station before a handover is executed, thus shortening data transmission interruption time.