Abstract: A user equipment includes a receiving unit configured to receive, from a base station apparatus, information designating a Bandwidth Part (BWP) of a cell, a control unit configured to configure a BWP to be activated, based on a parameter dedicated to the user equipment included in the information, when: the cell is a Special Cell (SpCell) and a configuration by a Radio Resource Control (RRC) is executed; or the cell is a Secondary Cell (SCell) and a Media Access Control (MAC) layer is activated, and a communication unit configured to communicate with the base station apparatus by using the BWP to be activated, wherein the parameter is configured in information for designating the BWP of the cell, irrespective of the number of BWPs configured for the cell.

Abstract: A terminal includes a receiver that receives an index specifying configuration information for transmitting a random access preamble; and a controller that configures, in response to the receiver receiving additional information that specifies a time domain resource for transmitting the random access preamble, the time domain resource specified by the additional information, the time domain resource being configured by replacing a time domain resource for transmitting the random access preamble included in the configuration information specified by the index with the time domain resource specified by the additional information.

Abstract: A terminal according to one aspect of the present disclosure includes a receiving section that receives a configuration indicating that disabling or enabling of a transform precoder for a physical downlink shared channel (PUSCH) is dynamically switched by at least one of downlink control information (DCI) and a Medium Access Control Control Element (MAC CE), and a control section that uses, as a period from reception of the DCI until transmission of the PUSCH, a second period longer than a first period in a case where the waveform is not switched. According to one aspect of the present disclosure, it is possible to easily perform switching of a waveform.

Abstract: A terminal includes a communication unit configured to perform communication to which dual connectivity is applied with a base station, a receiving unit configured to receive, from the base station, signaling indicating an indication to perform activation of a secondary cell group and signaling indicating an indication to perform deactivation of the secondary cell group, and a control unit configured to perform the deactivation of the secondary cell group and perform switching to a band including a synchronization signal, in a case where the receiving unit receives the signaling indicating the indication to perform the deactivation of the secondary cell group.

Abstract: A terminal includes a reception unit that receives, from a base station, a message for requesting to report a terminal capability, a control unit that configures information for reporting a parameter associated with a codebook based on information for indicating a range of the parameter associated with the codebook included in the message for requesting the report of the terminal capability, and that includes, in a message for reporting the terminal capability, the information for reporting the parameter associated with the codebook, and a transmission unit that transmits the message for reporting the terminal capability to the base station.

Abstract: A terminal includes a receiving unit that receives configuration information for transmitting a random access preamble; and a control unit that configures, when a two-step random access procedure is applied, a time domain resource specified by an index for the two-step random access procedure included in the configuration information, as a time domain resource for transmitting the random access preamble.

Abstract: A terminal includes a control unit that releases a resource of a secondary cell group in response to deactivation of the secondary cell group, in which the control unit performs a random access procedure to the secondary cell group in response to activation of the secondary cell group.

Abstract: A network configures different values for a secondary cell identifier assigned to a secondary cell, and a serving cell identifier assigned to a primary secondary cell, the primary secondary cell being a primary cell in a plurality of the secondary cells included in the same cell group, and transmits configuration information including the secondary cell identifier and the serving cell identifier to a terminal.

Abstract: UE (200) executes dual connectivity in which it simultaneously connects to a radio base station and other radio base station. The UE (200) includes a transmitting unit (210) that transmits to the radio base station and the other radio base station uplink transmission related information indicating an uplink transmission state, and a control unit (230) that controls transmission or stop of transmission of the uplink transmission related information of a predetermined type.

Abstract: A FrontHaul Multiplexer (FHM) for relaying communications between a signal processing device and a plurality of radio devices includes a storage unit that stores a table in which device identification information of each of the plurality of radio devices is associated with beam identification information assigned to the radio device; a scheduling information reception unit that receives, from the signal processing device, scheduling information of a user terminal performing radio communications with the plurality of radio devices; a determination unit that acquires from the table the device identification information associated with the beam identification information of uplink included in the scheduling information and then determines from the acquired device identification information the radio device in charge of the user terminal; and a transmission unit that transmits to the signal processing device an uplink signal transmitted from the determined radio device.

Abstract: A terminal includes a communication unit configured to perform communication to which dual connectivity is applied with a base station, a receiving unit configured to receive signaling indicating whether terminal-triggered secondary cell group activation or deactivation is enabled from the base station, a transmitting unit configured to transmit a response to the signaling to the base station, and a control unit configured to perform the secondary cell group activation or deactivation based on the signaling.

Abstract: In one aspect of the present invention, a first base station for communicating with user equipment together with a second base station according to dual connectivity includes a data storage unit configured to store data to be transmitted from the first base station to the user equipment; a reception unit configured to receive from the second base station information indicating whether data to be transmitted from the second base station to the user equipment exist; and a state control unit configured to, when information indicating that data to be transmitted from the second base station to the user equipment exist is received, prevent the user equipment from releasing a radio resource or transitioning to a discontinuous reception state, even if the amount of to-be-transmitted data stored in the data storage unit is less than or equal to a predetermined threshold.

Abstract: A user equipment includes a transmission unit that transmits, to a base station, information indicating a specific band combination supported by the user equipment for carrier aggregation and combinations of maximum numbers of Multiple-input and multiple-output (MIMO) layers to be applied to respective component carriers of frequency bands included in the specific band combination, the combinations of the maximum numbers of MIMO layers being supported by the user equipment; and a control unit that applies a default value as the maximum numbers of MIMO layers to be applied, by the user equipment, to the respective component carriers of the frequency bands included in the specific band combination, when a signal indicating the maximum numbers of MIMO layers to be applied, by the base station, to the respective component carriers of the frequency bands included in the specific band combination is not received from the base station.

Abstract: A terminal includes a receiving unit that receives, from a base station, a message that requests a report on terminal capability; a control unit that includes information for reporting a parameter for a codebook per band and information for reporting a parameter for a codebook per band combination in a message for reporting the terminal capability, the information for reporting the parameter for the codebook per band and the information for reporting the parameter for the codebook per band combination being included based on information for specifying a type of a codebook included in the message that requests the report on the terminal capability; and a transmitting unit that transmits the message for reporting the terminal capability to the base station.

Abstract: A base station apparatus, that is a first base station apparatus, is disclosed including a reception unit configured to receive, from a terminal, a configuration number of component carriers for a second base station apparatus among the first base station apparatus and the second base station apparatus that are used for dual connectivity; and a transmission unit configured to transmit the configuration number to the second base station apparatus. In other aspects, a terminal, a transmission method performed by a first base station apparatus, and a transmission method performed by a terminal are also disclosed.

Abstract: A terminal includes a transmitting unit that transmits a signaling message including information indicating a context to be established with a base station when there is one device corresponding to a transmission source address of the context to be established with the base station, the one device being connected to the terminal; and a control unit that attaches, to data, a compressed header corresponding to the context, when the data received from the one device is to be transmitted after transmitting the signaling message, wherein the transmitting unit transmits, to the base station, the data to which the compressed header is attached, the data not including a context identifier for identifying the context.

Abstract: A terminal includes: a receiving unit that receives a message requesting a report of a terminal capability, from a base station; a control unit that includes, in a message reporting the terminal capability, a terminal capability that is related to measurement using a reference signal for acquiring information regarding a channel state, for each band combinations that are selected from a plurality of bands that are terminal capability report targets included in the message requesting the report of the terminal capability; and a transmitting unit that transmits the message reporting the terminal capability to the base station. A range of a target time domain is specified for the terminal capability related to the measurement.

Abstract: Disclosed is a second base station device communicating with a first base station device. The second base station device includes a receiver configured to receive, from the first base station device, information for limiting radio resource allocation; a controller configured to allocate a radio resource based on the received information for limiting radio resource allocation; and a transmitter configured to transmit information for limiting radio resource allocation to the first base station device. The information for limiting radio resource allocation includes information indicating at least one of a frequency domain and a time domain indicating a location of a radio resource.

Abstract: A terminal includes a receiver that receives an index specifying configuration information for transmitting a random access preamble; and a controller that configures, in response to the receiver receiving additional information that specifies a time domain resource for transmitting the random access preamble, the time domain resource specified by the additional information, the time domain resource being configured by replacing a time domain resource for transmitting the random access preamble included in the configuration information specified by the index with the time domain resource specified by the additional information.

Abstract: A terminal includes a receiver that receives an index that specifies configuration information for transmitting a random access preamble; and a controller that configures, when the receiver receives additional information that specifies a time domain resource for transmitting the random access preamble and the index falls within a specific numerical range, the time domain resource specified by the additional information, the time domain resource being configured by replacing a time domain resource for transmitting the random access preamble included in the configuration information specified by the index with the time domain resource specified by the additional information.