Abstract: A user equipment in a radio communication system including the user equipment and a base station, including: an uplink transmission power information calculation unit configured to calculate uplink transmission power information of a serving cell using a parameter that may be changed dynamically; and a signal transmission unit configured to include, in control information in which the uplink transmission power information is set, identification information for identifying a parameter used for calculation of the uplink transmission power information, and to transmit the control information in which the identification information is included to the base station.

Abstract: A terminal is disclosed that includes a processor that determines a cyclic shift to be applied to a demodulation reference signal, based on a plurality of candidates configured by higher layer signaling and based on a field, for indicating a physical uplink control channel (PUCCH) resource for an uplink control information (UCI), included in a downlink control information. The terminal further includes a transmitter that transmits the UCI using a PUCCH format, in which the determined cyclic shift is applied to the demodulation reference signal and to which an orthogonal code having a sequence length less than 5 is applied, where the processor controls a frequency-domain orthogonal cover code (freq-domain OCC) to be applied for the PUCCH format, and where a number of bits of the UCI is more than 2. In other aspects, a base station and another terminal are also disclosed.

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 radio base station is disclosed including a first communication device that supports a cell; and a second communication device that is connected to the first communication device and controls the first communication device, wherein the second communication device transmits a radio resource control message including a reference system frame number and a reference time associated with the reference system frame number, to a terminal through the first communication device, and the first communication device transmits an acknowledgment to the transmission of the radio resource control message, to the second communication device. In other aspects, a radio communication method and a radio communication system are also disclosed.

Abstract: A user apparatus is provided. The user apparatus includes a control unit configured to determine, when a predetermined operation is triggered in a case of a predetermined-condition-based handover having been configured, which of an operation of the predetermined-condition-based handover or the predetermined operation is to be given priority. The control unit stops or suspends an operation that has not been given the priority.

Abstract: A user equipment includes a receiving unit configured to receive system information from a cell, a control unit configured to determine, based on an information element and identifiers, whether or not the cell is a candidate to be selected, the information element indicating other uses included in the system information and identifiers being of a plurality of closed access groups (CAGs) identifying groups of subscribers who are allowed to access the cell, and a communication unit configured to perform access to the cell in a case in which the control unit determines that the cell is the candidate to be selected.

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 equipment is disclosed including a transmitting unit; a receiving unit; and a control unit. The control unit starts connection to a second node different from a first node to which the user equipment is connected, in response to transmission, to the second node, of a connection request to the second node by the transmitting unit, or reception of the connection request from the second node by the receiving unit.

Abstract: A user equipment UE (10) includes a control unit (15) which performs a 2-step random access procedure in which MsgA is transmitted and MsgB including a response to MsgA is received, a transmitting unit (11) which transmits MsgA, and a receiving unit (13) which receives MsgB. MsgA includes at least one of a random access preamble to be transmitted on a physical random access channel and predetermined information to be transmitted on a physical uplink channel. The control unit (15) obtains or decides at least one parameter among an adjustment value of a physical uplink channel transmission timing, information on allocation of the physical uplink channel, and an identifier allocated to the UE (10), outside of the 2-step random access procedure. The control unit (15) causes the transmitting unit (11) to transmit MsgA based on the obtained or decided parameter.

Abstract: The present invention is designed to reduce the decrease of uplink throughput in the event a user terminal connects with a plurality of radio base stations. A user terminal (20) according to an example of the present invention provides a user terminal to connect with a plurality of radio base stations including at least a first radio base station and a second radio base station, and this user terminal has a PH report generating section (411) that calculates the PH (Power Headroom) of each radio base station and generates PH reports, and a transmission section (203) that transmits either the PUSCH (Physical Uplink Shared Channel) bandwidth of the first radio base station, a PH report per resource block, or information about the transmission power density, and a PH report for the first radio base station, to the second radio base station.

Abstract: A user equipment includes a control unit configured to, in a case where an SUL (Supplementary Uplink) is configured for a serving cell and the user equipment supports the SUL, determine to use the SUL for a random access procedure, a transmitting unit configured to transmit a first signal according to the random access procedure in the serving cell, and a receiving unit configured to receive a second signal in response to the first signal according to the random access procedure in the serving cell.

Abstract: A radio base station determines an allocation number of header compression sessions capable of being configured by each of a radio base station and another radio base station on which a user equipment performs dual connectivity, based on a maximum number of header compression sessions capable of being configured by the user equipment, and transmits allocation information indicating the allocation number to the other radio base station. In other aspects, a user equipment and a radio communication system are also disclosed.

Abstract: A user equipment includes a receiving unit configured to receive system information from a cell, a control unit configured to determine whether the cell is a candidate to be selected based on an information element indicating other uses included in the system information and a combination of an identifier of a public land mobile network (PLMN) and an identifier of a network, and a communication unit configured to perform access to the cell in a case in which the control unit determines that the cell is the candidate to be selected.

Abstract: A user terminal is disclosed that includes a receiver that receives a downlink signal using multiple cells and a transmitter that periodically transmits multiple channel state information using a predetermined transmission time unit length. The user terminal also includes a processor that controls transmission of the channel state information by configuring a transmission period and timing of the multiple channel state information per cell based on a notification from a higher layer.

Abstract: A user apparatus includes a communication unit configured to communicate with a first base station apparatus and a second base station apparatus, wherein the first base station apparatus is a master node in a New Radio (NR) radio communication system and the second base station apparatus is a secondary node in the NR radio communication system; a reception unit configured to receive from the first base station apparatus an instruction to measure a system frame number and frame timing difference (SFTD) representing a system frame number and frame timing difference between cells; a control unit configured to measure SFTD between a cell of the first base station apparatus and a cell of the second base station apparatus based on the instruction to measure SFTD; and a transmission unit configured to transmit to the first base station apparatus a measurement result including the measured SFTD.

Abstract: A UE (200) performs a random access procedure with a gNB (100). The UE (200) transmits to a network via a radio base station at least one of a synchronization signal block used for performing the random access procedure, a reception quality in the synchronization signal block, a group of random access preambles, and number of times for which power ramping was performed in the random access procedure.

Abstract: Upon receiving, from UE (200), SCG Failure Information that indicates that a radio link failure has occurred in a secondary cell group, eNB (100A) transmits, to gNB (100B), Secondary Node Modification Request to instruct to release a resource of a split bearer of only a predetermined layer and the layers below thereof in the secondary cell group. Based on the received Secondary Node Modification Request, the gNB (100B) releases the resource of the split bearer below the predetermined layer in the secondary cell group. The eNB (100A) deletes setting itself of the secondary cell group when a bearer belonging to the secondary cell group other than the split bearer is not set.

Abstract: A user apparatus includes a transmission unit for transmitting a signal related to a random access procedure in a serving cell; a reception unit for receiving a signal related to the random access procedure in the serving cell; and a control unit for determining a carrier to be used for the random access procedure, the carrier being configured to the serving cell. The control unit determines whether a first carrier is configured to the serving cell, determines whether the first carrier of the serving cell is supported when the first carrier is configured to the serving cell, and determines to use the first carrier for the random access procedure when the first carrier of the serving cell is supported. An operation of determining the carrier to be used for the random access procedure is performed in at least one of a MAC layer and an RRC layer.

Abstract: A user equipment includes a communication unit that performs communication to which dual connectivity configured by a master cell group and a secondary cell group is applied, a control unit that detects an occurrence of a failure in the master cell group, and a transmitting unit that transmits information related to the occurrence of the failure in the master cell group to a master node of the master cell group, in which, in a state in which the communication unit continues a connection with a secondary node of the secondary cell group, the control unit changes a primary cell to another cell by handover in the same radio access technology (RAT).

Abstract: A user apparatus includes a communication unit configured to communicate with a first base station apparatus and a second base station apparatus, wherein the first base station apparatus is a master node in an NR radio communication system and the second base station apparatus is a secondary node in an E-UTRA radio communication system; a reception unit configured to receive from the first base station apparatus an instruction to measure a system frame number and frame timing difference (SFTD) representing a difference in a system frame number and frame timing difference between cells; a control unit configured to measure SFTD between a cell of the first base station apparatus and a cell of the second base station apparatus based on the instruction to measure SFTD; and a transmission unit configured to transmit to the first base station apparatus a measurement result including the measured SFTD.