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: The present invention is designed to properly control the transmission of UL signals transmitted in response to DL transmission, in future radio communication systems. A receiving section that receives downlink control information and downlink data, and a control section that controls the transmission of an acknowledgment signal in response to the downlink data, are provided, and the control section controls the timing for transmitting the delivery acknowledgment signal based on timing information included in the downlink control information.

Abstract: A terminal is disclosed including a transmitter that transmits a beam recovery request signal and a processor that controls the transmission of the beam recovery request signal. The transmission of the beam recovery request signal is controlled by the processor based on a received power that is measured using a channel state information reference signal (CSI-RS) resource or a synchronization signal (SS) block that is quasi co-located (QCL) with a demodulation reference signal of a downlink control channel. In other aspects, a radio communication method is also disclosed.

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: A radio communication device that avoids the trouble arising because of transmission and reception of a signal repeatedly several times, and performs communication appropriately with a radio base station is provided.

Abstract: A user equipment apparatus includes a signal reception unit configured to receive, from a base station, a signal including a plurality of code words, each formed by one or more code blocks in one carrier; and a received signal processing unit configured to process the signal including the plurality of code words. A user equipment apparatus also includes a transmission signal processing unit configured to encode information to be transmitted to a base station to generate one or more code blocks, and to generate a signal including a plurality of code words, each formed by the one or more code blocks; and a signal transmission unit configured to transmit the signal including the plurality of code words in one carrier.

Abstract: The present invention is designed to allow adequate communication even when the number of CCs that can be configured in a user terminal is expanded from that of existing systems and/or when CA is executed using unlicensed CCs. A user terminal communicates with a radio base station by means of carrier aggregation using a plurality of component carriers (CCs), and has a receiving section that receives DL signals transmitted from each CC, a transmission section that transmits UL signals, and a control section that controls transmission operations in the transmission section, and, when a plurality of CCs, including at least a first CC, which corresponds to a primary CC of an existing system, and a third CC, which is different from the first CC and a second CC that corresponds to a secondary CC of the existing system, are configured, the control section applies, to the third CC, UL signal transmission operations that are different from those of the second CC.

Abstract: A terminal is disclosed that includes a receiver that receives a downlink (DL) signal transmitted from each of a plurality of component carriers (CC) in dual connectivity and a processor that makes measurement of the DL signal based on a measurement requirement. The terminal further includes a first measurement requirement of a first secondary CC to which listening before transmission is applied is different from a second measurement requirement of a second secondary CC to which the listening before transmission is not applied.

Abstract: A user equipment (UE) is disclosed including a receiver that receives Sounding Reference Symbol (SRS) configuration information that indicates a first resource used for transmission of a predetermined reference signal from a base station (BS). The UE includes a transmitter that transmits an SRS using a second resource that is the first resource. The UE further includes a processor that determines a precoder applied to the SRS based on the predetermined reference signal. The transmitter transmits the SRS precoded using the determined precoder. The predetermined reference signal is a Channel State Information Reference Signal (CSI-RS), an SRS, or a Synchronization Signal Block (SSB)/Physical Broadcast Channel (PBCH).

Abstract: A user equipment (UE) includes a memory that stores a state of semi-persistent Channel State Information (CSI)-Reference Signal (RS) as a first state where the semi-persistent CSI-RS is activated or a second state where the semi-persistent CSI-RS is deactivated; a receiver that receives a predetermined trigger information; and a processor that changes the state in the memory and causes a transmitter to perform aperiodic CSI reporting based on the predetermined trigger information.

Abstract: A user terminal includes: a reception section that receives a downlink signal including a demodulation reference signal; a signal separation section that separates the demodulation reference signal from the downlink signal based on an expansion pattern obtained by applying a set expansion method to expand a basic pattern; and a channel estimation section that uses the demodulation reference signal to compute a channel estimation value. The basic pattern indicates resource elements to which a demodulation reference signal of 8 layers is mapped, and the expansion pattern indicates resource elements to which a demodulation reference signal of 16 layers is mapped.

Abstract: A method of acquiring Channel State Information (CSI) in a wireless communication system includes transmitting, from a Base Station (BS) to a User Equipment (UE), a resource setting including time-domain behavior of CSI-Reference Signals (RSs) transmission that designates aperiodic, periodic, or semi-persistent; and transmitting, from the BS to the UE, the CSI-RSs based on the designated aperiodic, periodic, or semi-persistent. The resource setting includes precoding information that indicates whether precoders applied to the CSI-RSs is the same or different. The resource setting includes periodicity and a timing offset value of the CSI-RS transmission when the periodic or the semi-persistent is designated. The resource setting includes frequency-domain information that designates a wideband or a partial band used for the CSI-RS transmission. The resource setting includes a transmission bandwidth of the CSI-RS transmission when the partial band is designated.

Abstract: In user terminal 20, control section 202 determines signal waveforms according to a signal-waveform switching pattern notified by control section 102 of base station 10, and indicates the signal waveforms to preprocessing section 205, signal detection section 207, and post-processing section 208 for each TTI. Configuration IDs are assigned to respective signal-waveform switching patterns, and signal waveforms that are to be transmitted in TTIs and that are specified by the TTI index are configured for each of the Configuration IDs. With this configuration, a plurality of signal waveforms whose symbol lengths are different from one signal waveform to another are used together while no symbol spans two adjacent TTIs.

Abstract: The present invention is designed so as to enable proper beam management (including, for example, reporting and/or indication of beams). According to the present invention, a user terminal has a receiving section that receives a downlink (DL) control channel for a first search space, and a control section that specifies a beam that is used to transmit and/or receive a DL control channel for the first search space based on associations between antenna ports of demodulation reference signals and mobility measurement signals.

Abstract: The invention is designed to switch beams quickly. A user terminal, according to the present invention, has a receiving section that receives a downlink (DL) signal, and a control section that controls a beam to use to transmit and/or receive the DL signal. When the DL signal is transmitted and/or received using one or more candidate beams, the control section selects the beam based on the measurement results of the demodulation reference signals of one or more antenna ports that respectively correspond to the one or more candidate beams.

Abstract: The present invention is designed to suitably mitigate the decrease in communication throughput even when type-II feedback is used. According to one aspect of the present invention, a user terminal has a control section that determines a beam pattern that shows a fixed set of beams, and determines at least one beam that is not included in the beam pattern; and a transmission section that transmits feedback information related to the beam pattern and the at least one beam that is determined.

Abstract: To suppress continuation of deterioration of communication quality due to beam failure, also in the case of using beam forming in both transmission and reception, a user terminal according to one aspect of the present invention is characterized by having a control section that controls a transmission beam, and a transmission section that transmits a signal using the transmission beam, where when the control section updates the transmission beam, the transmission section transmits information about transmission beam update, using an updated transmission beam.

Abstract: The present invention is designed so that synchronization can be adequately established even when a band to use is limited to a narrow band than the minimum system bandwidth (1.4 MHz) that is supported in existing LTE.

Abstract: The present invention is designed so that interference measurements are configured flexibly even when transmission is made in multiple layers. A user terminal has a receiving section that receives a DL signal, and a control section that controls the measurement of the DL signal, the receiving section receives information related to an interference measurement resource including a combination of a plurality of ports and/or channels, and the control section controls the measurement of the DL signal based on the information related to the interference measurement resource.