Abstract: A user equipment communicates with a base station using a first RAT and a second RAT, including: a transmission unit to perform uplink transmission using the first RAT and the second RAT; a control unit to, if a sum of transmission powers of the uplink transmission via the first RAT and the second RAT exceeds a predetermined maximum transmission power, reduce the transmission power of the uplink transmission via the second RAT. If the sum exceeds a maximum transmission power and the transmission unit fails to transmit random access preamble via the second RAT and re-transmits the random access preamble, or if dynamic power sharing is not supported and the random access preamble is not transmitted via the second RAT in a slot where an uplink transmission via the first RAT is scheduled, the control unit changes transmission power control for the re-transmitted random access preamble from normal control.

Abstract: A user equipment includes a transmitting unit that transmits data to base station apparatus using a preconfigured uplink resource and a receiving unit that, when a search space for receiving information relevant to the uplink resource and a predetermined resource overlap each other in a time domain, monitors only one of the search space and the predetermined resource or monitors both the search space and the predetermined resource.

Abstract: A user equipment includes a transmission unit that transmits a first message to a base station apparatus, the first message including a random access preamble in a two-step random access procedure, a reception unit that receives a second message for contention resolution in the two-step random access procedure from the base station apparatus, and a control unit that determines a transport block size of an uplink shared channel included in the first message based on a parameter associated with communication to the base station apparatus.

Abstract: A user equipment includes a transmission unit that transmits a first message including a random access preamble in a two-step random access procedure, a reception unit that receives one or more second messages for contention resolution in the two-step random access procedure, and a control unit that controls an operation to receive the second messages based on information associated with an identifier of the first message included in the second messages.

Abstract: A base station apparatus includes: a receiving unit configured to receive a first message from user equipment in a two-step random access procedure; and a control unit that determines not to return any feedback to the user equipment when the receiving unit correctly receives only some of a plurality of messages included in the first message.

Abstract: A user equipment includes a receiving unit configured to receive a first number of multiple input multiple output (MIMO) layers and a second number of MIMO layers from a base station device, a control unit configured to select the first number of MIMO layers or the second number of MIMO layers for an activated bandwidth part (BWP) based on a type of the activated BWP, and a communication unit configured to perform communication using the selected number of MIMO layers, in which the first number of MIMO layers is a number of MIMO layers configured for a default BWP or an initial BWP, and the second number of MIMO layers is a number of MIMO layers configured for each cell.

Abstract: A user apparatus communicates with a base station apparatus via a radio frame. The user apparatus includes a reception unit configured to receive information related to a RACH configuration table that indicates allocation of RACH resources in the time domain in the radio frame and information used for excluding unavailable RACH resources of the radio frame in the time domain, a control unit configured to identify available RACH resources based on the information related to the RACH configuration table and the information used for excluding unavailable RACH resources, and a transmission unit configured to transmit a preamble to the base station apparatus by using the identified available RACH resources.

Abstract: A user equipment includes a control unit that sets a value other than zero, as a timing advance value to be applied for transmitting a random access preamble in a MessageA transmission in a 2-step random access procedure; and a transmitting unit that transmits the random access preamble in the MessageA transmission in the 2-step random access procedure by applying the timing advance value set by the control unit.

Abstract: An aspect of a user terminal of the present disclosure includes: a control section that decides an uplink shared channel resource to be used in a two-step random access procedure in consideration of a position of a given area in a time direction; and a transmitting section that transmits a first message by using the decided uplink shared channel resource and a preamble.

Abstract: A user equipment includes a transmitting unit configured to transmit first data in a first step of a 2-step RACH; and a receiving unit configured to receive second data in a second step of the 2-step RACH. The user equipment performs fallback to a 4-step RACH at the time of retransmission of the first data. In addition, provided is a user equipment including: a transmitting unit configured to transmit first data in a first step of a 2-step RACH; and a receiving unit configured to receive second data in a second step of the 2-step RACH. The user equipment performs fallback to a 4-step RACH according to the received second data.

Abstract: A terminal includes a processor, coupled to a transceiver, that monitors a PDCCH (Physical downlink control channel) candidate in a first search space during a random access procedure. The transceiver receives a random access response or a PDSCH (Physical downlink shared channel) for contention resolution from a base station, based on information included in the PDCCH candidate, and the transceiver receives a PDSCH or transmit an uplink signal based on information included in a PDCCH candidate monitored in the first search space, unless a second search space of a type other than the first search space is configured after the random access procedure is completed.

Abstract: A user equipment includes a receiving unit configured to receive, from a base station apparatus, an instruction designating a method in which a random access procedure is performed, and includes a control unit configured to determine, in accordance with the instruction, whether to execute a random access procedure of a method in which a first message is transmitted using a preamble resource and a PUSCH resource.

Abstract: A user equipment includes a control unit that sets an operation mode of the user equipment to an idle mode; and a transmission unit that transmits, while a time alignment retained by the control unit is valid, information indicating presence of the user equipment on each of transmission resources with a predetermined frequency in a time direction, from among a plurality of transmission resources that is preconfigured for transmitting data in the idle mode and arranged in the time direction, wherein the transmission unit stops transmitting the information indicating the presence of the user equipment in response detecting that the time alignment is invalid.

Abstract: A user equipment includes a transmitting unit configured to transmit a message in a random access procedure by using a preamble resource and a PUSCH resource, and a control unit configured to start a time window for monitoring a random access response after a resource that is one of the preamble resource and the PUSCH resource whichever ends later in time domain.

Abstract: A communication device includes a receiving unit that receives information indicating a time division duplex (TDD) configuration; a control unit that obtains information related to an uplink, in the received information indicating the TDD configuration; and a transmitting unit that transmits the information related to the uplink on a sidelink.

Abstract: In order to properly notify of resources in which a synchronization signal block is transmitted in the future radio communication system, a user terminal has a receiving section that receives pattern information indicating whether or not a synchronization signal block is transmitted in each of a plurality of transmission candidate positions within a group of transmission candidate positions of the synchronization signal block, and group information indicating a method of applying the pattern information to each of a plurality of groups, and a control section that controls, based on the group information, one of assuming that the synchronization signal block is transmitted in all transmission candidate positions within a particular group, and of determining the plurality of transmission candidate positions within the particular group according to the pattern information.

Abstract: In one aspect of the present invention, user equipment for transmitting a preamble at any timing after synchronization with a base station includes a reception unit that detects a synchronization signal or a physical broadcast channel from the base station; a resource selection unit that determines resources available for transmission of the preamble based on configuration information for preamble transmission, and selects, from the resources available for transmission of the preamble, a resource for transmitting the preamble according to the detected synchronization signal or the detected physical broadcast channel based on a mapping rule; and a transmission unit that transmits the preamble to the base station on the selected resource.

Abstract: A user equipment includes a control unit that sets an operation mode of the user equipment to an idle mode; a transmission unit that transmits data by using a preconfigured radio resource for transmitting data in the idle mode; and a reception unit that receives transmission acknowledgement information for the data by monitoring at least one search space from a paging search space or an additional search space that is to be monitored in the idle mode.

Abstract: A terminal is disclosed including a receiver that receives synchronization blocks and an indication triggering contention free random access from a base station apparatus; a processor that identifies a synchronization block, a random access preamble and a random access channel occasion for use in the contention free random access based on the indication triggering contention free random access; and a transmitter that transmits the identified random access preamble to the base station apparatus by use of the identified synchronization block and the identified random access channel occasion. In other aspects, a base station apparatus is also disclosed.

Abstract: A user equipment includes a receiving unit that receives information indicating that, in a case in which a first condition is satisfied by a first type of measurement result, a second type of measurement result is to be reported, and a control unit that determines, when it is specified or indicated that RRM measurement relaxing or adaptation is to be performed in a case in which a second condition including a threshold value is satisfied, that the threshold value corresponds to the first type of measurement result, and performs the RRM measurement relaxing or adaptation in a case in which the second condition including the threshold value is satisfied by the first type of measurement result.