Abstract: A user apparatus includes a reception unit configured to receive from a base station apparatus DL-UL configurations specifying resources used for DL (Downlink), resources used for UL (Uplink), and flexibly used resources in TDD (Time Division Duplex), and to receive UL scheduling; a transmission unit configured to perform UL transmission to the base station apparatus based on the DL-UL configurations and the UL scheduling; and a control unit configured to control UL transmission not to exceed a predetermined UL resource usage rate.

Abstract: A user apparatus is disclosed including a receiving unit configured to receive DL (Downlink)-UL (Uplink) configuration indicating a resource used to DL, a resource used to UL and a flexible resource in TDD (Time division duplex) and receive an UL scheduling from a base station apparatus, a transmitting unit configured to transmit UL to the base station apparatus based on the DL-UL configuration and the UL scheduling, and a control unit configured to determine a target ratio not to exceed a ratio of using UL resource and indicate the target ratio as a UE (User Equipment) capability to the base station apparatus. In other aspects, a base station device is also disclosed.

Abstract: A base station configured to perform communication with a user apparatus in a radio communication system, including: a storage unit configured to store configuration information on an aggregated downlink control channel in which a plurality of downlink control channels in a plurality of slots are aggregated; and a transmission unit configured to transmit downlink control information, to the user apparatus, using the aggregated downlink control channel based on the configuration information.

Abstract: To enable communication to be performed with a communication scheme suitable for the future radio communication system where a plurality of user terminals is multiplexed in the power domain, a user terminal of the present invention is provided with a reception section that receives a downlink (DL) signal to the user terminal, and a decoding section that decodes the DL signal to the user terminal, where at least one of a cyclic prefix (CP) length, symbol length and transmission time interval (TTI) length is different between the DL signal to the user terminal and a DL signal to another user terminal multiplexed in the power domain.

Abstract: A terminal and base station are disclosed where the terminal includes a receiver that receives a signal of a downlink shared channel and a processor that controls reception of a demodulation reference signal included in the downlink shared channel. The processor controls reception of a demodulation reference signal based on one of a first mapping method or a second mapping method. The first mapping method being a method in which the demodulation reference signal is mapped to a fixed symbol within a slot of the downlink shared channel, and the second mapping method being a method in which the demodulation reference signal is mapped to a top symbol of symbols for which the downlink shared channel is scheduled.

Abstract: A user equipment that is used in a wireless communication system supporting an intermediate state between a connected state and an idle state includes: a comparison unit that, when uplink data is generated in the user equipment in the intermediate state, compares a size of the uplink data with a predetermined upper limit; and a transmitting unit that transmits the uplink data to a base station in a contention-based manner when the comparison unit determines that the size of the uplink data is less than the predetermined upper limit and transmits the uplink data to the base station in a contention-free manner when the comparison unit determines that the size of the uplink data is greater than the predetermined upper limit.

Abstract: Techniques for implementing resource sharing are disclosed in which radio resources for transmitting control information and data information are shared. An aspect of the present invention relates to a base station including a scheduling unit configured to assign control information and data information in units of a resource assignment unit in a common resource area, wherein the control information and the data information are to be transmitted to a user equipment in the common resource area; and a resource assignment indication unit configured to transmit resource assignment information of the data information to the user equipment by the control information.

Abstract: A user apparatus configured to perform communication with a base station in a radio communication system, including: a storage unit configured to store configuration information on an aggregated uplink control channel in which a plurality of uplink control channels in a plurality of slots are aggregated; and a transmission unit configured to transmit uplink control information, to the base station, using the aggregated uplink control channel based on the configuration information.

Abstract: Techniques for transmission and reception of a control channel with a directional beam are disclosed. One aspect of the present invention relates to a base station, comprising: a scheduling unit configured to allocate a radio resource to a user apparatus; and a signal processing unit configured to process a radio signal for transmission to and reception from the user apparatus, wherein the scheduling unit allocates control information for transmission to the user apparatus to a radio resource within a search space specific to the user apparatus, and the signal processing unit transmits the control information to the user apparatus with a transmission beam corresponding to the allocated radio resource among multiple types of transmission beams.

Abstract: Transmission and reception techniques for reference signals to implement proper precoding gain and channel estimation accuracy are disclosed. One aspect of the present invention relates to a base station, comprising: a communication control unit configured to control radio communication with a user apparatus; and a reference signal processing unit configured to indicate a reference signal configuration for each resource assignment unit to the user apparatus and transmit a reference signal to the user apparatus in accordance with the indicated reference signal configuration.

Abstract: A user equipment apparatus in a radio communication system in which uplink communication and downlink communication are dynamically changed includes a reception unit configured to receive, from a base station, control information indicating a resource for an uplink demodulation reference signal in a subframe used for transmitting uplink data; and a transmitting unit configured to transmit the uplink demodulation reference signal according to the control information; wherein the resource for the uplink demodulation reference signal is multiplexed into a part of resources corresponding to one or more symbols at a beginning of a data segment in the subframe used for transmitting the uplink data.

Abstract: To suppress decrease in throughput even in the case of combining NOMA and MIMO to use, a radio base station according to one aspect of the present invention has a transmission section that transmits a DL signal to each of a plurality of user terminals with a single or a plurality of streams, and a control section that controls so as to perform power multiplexing on DL signals transmitted to the user terminals to transmit, where the control section sets a multiplexing power ratio of the DL signals to perform power multiplexing for each stream.

Abstract: Disclosed are a method and an encoder for performing polar coding on an input data sequence to generate a polar code. The encoding method including: generating, based on a first order index set, a second order index set for parent code length of the polar code, each order index of the first or second order index set representing a priority order of transmitting an information bit in a bit position indicated by the order index relative to transmitting information bits at bit positions indicated by other indexes; spreading, according to the second order index set, the input data sequence to a data sequence with bit number equal to the parent code length; performing polar coding on the spread data sequence to generate the polar code.

Abstract: A user apparatus in a radio communication system including a plurality of base stations, including a reception unit that receives, from a connecting base station, control information to be used for reducing a signal of a control channel, that causes interference, sent from an interference base station for the user apparatus, and an interference reducing unit that reduces the signal of the control channel that causes the interference by using the control information to obtain a desired signal sent from the connecting base station.

Abstract: Disclosed is a reference signal transmission scheme in which interference between adjacent cells is considered in a communication scheme in which uplink communication and downlink communication are dynamically switched. A feature of the present invention relates to a user equipment including a transmitting and receiving unit that performs transmission and reception of a radio signal with a base station in accordance with a communication scheme in which uplink communication and downlink communication are dynamically switched and a signal processing unit that processes the radio signal, wherein the transmitting and receiving unit transmits an uplink reference signal generated by the signal processing unit in fixed uplink radio resources in the communication scheme.

Abstract: A communication apparatus in a radio communication system, including: a reception unit configured to receive control information including puncture information which indicates that there is a puncture resource in resources allocated to the communication apparatus from another communication apparatus; and a decoding unit configured to decode data received from the other communication apparatus in the allocated resources, wherein the decoding unit performs the decoding using the puncture information included in the control information received by the reception unit.

Abstract: A user equipment which is used in a radio communication system, the user equipment including: a receiver unit configured to receive control information, which is used to acquire a desired signal from a multiplexed signal into which a plurality of user signals are multiplexed in a power domain, from a base station via a downlink physical control channel; and a desired signal acquiring unit configured to acquire the desired signal from the multiplexed signal using the control information, wherein the receiver unit receives configuration information indicating a notification method of the control information from the base station by upper layer signaling and receives the control information on the basis of the configuration information.

Abstract: Disclosed is a scheme of transmitting various types of radio signals for which interference between adjacent cells is considered in a radio communication system (for example, dynamic TDD) in which uplink communication and downlink communication can be dynamically switched. A feature of the present invention relates to user equipment including a transceiver that performs transmission and reception of a radio signal with a base station in accordance with a communication scheme in which uplink communication and downlink communication are dynamically switched and a signal processor that processes the radio signal, wherein the transceiver transmits a connection request signal generated by the signal processor in fixed uplink radio resources of the communication scheme.

Abstract: Provided is a user equipment in a radio communication system that includes a plurality of user equipments and a base station and supports a communication scheme in which uplink radio resources are shared by the plurality of user equipments, and the user equipment includes a receiving unit that receives ACK or NACK from the base station with respect to an uplink signal, a control unit that determines that retransmission of the uplink signal is performed when the receiving unit receives NACK with respect to the uplink signal or when none of ACK and NACK are received with respect to the uplink signal, and a transmitting unit that transmits an uplink signal of a next transmission timing in accordance with a first retransmission scheme when the receiving unit receives ACK or retransmits the uplink signal in accordance with a second retransmission scheme when the control unit determines that the retransmission of the uplink signal is performed.

Abstract: A radio communication apparatus functioning as a transmitter in a radio communication system including the transmitter and a receiver includes a first data generation unit that generates first data which are to be transmitted in accordance with a first transmission scheme, a second data generation unit that generates second data which are to be transmitted in accordance with a second transmission scheme, a transmission parameter determination unit that determines a first transmission parameter for the first data and a second transmission parameter for the second data, and a transmission unit that, when the second data are generated during transmission of the first data, punctures a portion of a resource allocated for the transmission of the first data, transmits the first data using the first transmission parameter in an unpunctured portion, and transmits the second data using the second transmission parameter in the punctured portion.