Abstract: The user equipment comprises a reception unit configured to receive allocation information of reference signals from a base station apparatus or a first user equipment, the reference signals being used in a device-to-device direct communication; a control unit for determining a device-to-device direct communication signal based on the allocation information of reference signals used in the device-to-device direct communication; and a transmitter configured to transmit the determined device-to-device direct communication signal to a second user equipment, wherein the allocation information of reference signals used in the device-to-device direct communication includes a transmission density of the reference signals used in the device-to-device direct communication.

Abstract: A user device includes a control unit that arranges a reference signal or a gap in a signal of D2D direct communication and a transmitting unit that transmits the signal of the D2D direct communication and information related to the reference signal or the gap to another user device.

Abstract: A user equipment for performing inter-terminal direct communication with one or a plurality of user equipments, includes a receiving unit configured to receive a synchronization signal or a reference signal transmitted from the plurality of user equipments; a control unit configured to control transmission power of the inter-terminal direct communication, based on the received synchronization signal or the received reference signal transmitted from the plurality of user equipments; and a transmitting unit configured to perform transmission of the inter-terminal direct communication by applying the controlled transmission power, to at least one of the plurality of user equipments.

Abstract: A communication device includes a transmitter that transmits data; and a controller that causes, based on information indicating priority levels of respective radio resources of a plurality of radio resources and a priority level of the data, the transmitter to transmit the data using a radio resource provided with a priority level corresponding to the priority level of the data.

Abstract: A disclosed communication apparatus includes a receiver configured to receive control information for a specified communication apparatus from a base station; and a transmitter configured to identify, based on the control information, a resource used by the specified communication apparatus for communication, and to execute a process of not performing transmission using the identified resources.

Abstract: A user equipment includes a receiving unit that executes sensing for a part of candidate resources to be used for transmission of inter-terminal direct communication, a control unit that determines a resource to be used for transmission based on a result of the sensing, and a transmitting unit that transmits a message to another units of user equipment using the determined resource.

Abstract: According to one aspect of the present invention, a user terminal has a transmission section that is capable of transmitting a plurality of waveforms including a first waveform and a second waveform while switching therebetween, wherein the first waveform is based on a first transmission scheme and the second waveform is based on a second transmission scheme, and transmits the first waveform at a given timing, by using a given cell, and a control section that calculates a power headroom for the second waveform, which is one of the plurality of waveforms and which is not transmitted at the given timing. According to one aspect of the present invention, communication can be continued adequately even when communication is performed by using multiple waveforms.

Abstract: A communication apparatus is disclosed including a reception unit configured to receive assignment information of an uplink resource from a base station; and a transmission unit configured to transmit, to the base station, by the uplink resource, a signal received by a sidelink resource associated with the uplink resource. In another aspect, another communication apparatus is also disclosed.

Abstract: A user apparatus has a request unit configured to transmit a scheduling request to a base station apparatus, an acquisition unit configured to receive information indicative of a resource pool based on the scheduling request from the base station apparatus, and a communication unit configured to perform sidelink transmission to another user apparatus using the resource pool.

Abstract: A terminal is disclosed including a transmitter that transmits a signal to which precoding is applied and a processor that: if given information is notified to the terminal, determines the precoding based on feedback information; and if the terminal is not notified of the given information, determines the precoding based on a reference signal. In other aspects, a radio communication method for a terminal, a base station, and a system are also disclosed.

Abstract: A user equipment includes a measuring unit that executes sensing of a resource set with which signals from one or more other units of user equipment are transmitted; a control unit that determines, based on a measurement result of the resource set by the sensing, whether to operate as a first device that allocates a resource in the resource set associated with a cluster or to operate as a second device to which a resource is allocated by the first device in the cluster formed of a plurality of units of user equipment; and a communication unit that executes communication with the one or more other units of user equipment.

Abstract: A communication device includes a transmitter that transmits data; and a controller that generates, in response to a predetermined trigger, a request signal including information on a time and frequency location of a radio resource to be used by the transmitter.

Abstract: A communication device includes a receiving unit that receives at least one of configuration information of a same center frequency used for downlink reception and sidelink reception in one slot or configuration information of a same center frequency used for uplink transmission and sidelink transmission in the one slot; and a control unit that configures, based on the received configuration information, at least one of the same center frequency for the downlink reception and the sidelink reception in the one slot or the same center frequency for the uplink transmission and the sidelink transmission in the one slot.

Abstract: The present invention is directed to suppress deterioration of communication throughput and so on even when a group common TPC command is used. In accordance with one aspect of the present disclosure, a user terminal has a receiving section that receives downlink control information (DCI) regarding transmit power control (TPC) commands transmitted in a common search space and a control section that identifies a position of a TPC command corresponding to each of carriers included in the DCI based on information regarding positions of the TPC commands for the respective carriers in a cell.

Abstract: A user terminal according to one aspect of the present invention has a transmitting/receiving section that performs transmitting or receiving processes for signals based on downlink control information, and a control section that decides to use different codebooks for the processes for a plurality of signals. According to one aspect of the present invention, it is possible to switch between and use a number of codebooks, so that the drop in communication throughput and the like can be reduced.

Abstract: A user equipment in one embodiment of the present invention includes a random access control unit for deciding whether a condition that same transmission power is usable when changing a transmission beam and retransmitting a preamble is satisfied, and determining transmission power of the preamble based on the deciding, and a transmission unit for transmitting the preamble using the determined transmission power.

Abstract: A user terminal according to one aspect of the present invention is characterized by having a receiving section that receives a power control ID, a control section that controls transmit power according to a transmit power parameter set specified by the power control ID, and a transmitting section that transmits a signal corresponding to an object set specified by the power control ID, using the transmit power. According to one aspect of the invention, it is possible to suppress a reduction in communication throughput, even in the case of using beam specific transmit power control.

Abstract: The apparatus according to one aspect of the present invention communicates using beams, and has a receiving section that receives information about a beam of another apparatus, and a control section that decides whether or not to select a transmitting beam autonomously, based on whether certain information is present or not. According to one aspect of the present invention, even when certain apparatus is capable of selecting beams autonomously, it is still possible to reduce the decline in communication throughput and so forth.

Abstract: According to one aspect of the present invention, a user terminal has a transmitting/receiving section for transmitting and/or receiving signals by using a certain beam, and a control section that exerts control for switching between a first beam selection process for selecting the certain beam by using information about a reported beam and a second beam selection process for selecting the certain beam autonomously, based on information about a certain switching condition. According to the present invention, even when multiple beam selection methods are used, it is still possible to prevent the situation where unexpected beam selection methods are used.

Abstract: A user apparatus in a wireless communication system including a base station and a user apparatus, includes a signal reception part that receives, from the base station, a plurality of power control parameters that become candidates for power control parameters to be used by the user apparatus, a transmission power determination part that selects power control parameters to be used, from the plurality of power control parameters, and determines a transmission power of a UL signal, based on the selected power control parameters and a pathloss estimation value, and a signal transmission part that transmits the UL signal using the transmission power determined by the transmission power determination part.