Abstract: A method of transmission of Channel State Information Reference Signals (CSI-RSs) includes transmitting, from a base station (BS) to a user equipment (UE), the CSI-RSs using 24 antenna ports (APs) or 32 APs. A first CSI-RS configuration for the APs are configured by aggregating a predetermined number of second CSI-RS configurations. A number of APs per each of the second CSI-RS configurations is 2, 4, or 8.

Abstract: The present invention provides a user terminal that reports channel state information to base station apparatus in order to reduce the overhead of signaling required in beam measurements and to lower the complexity of beam measurements and calculation, and, in this user terminal, a receiving section that receives basis beam reference signals, each included in one or a plurality of basis beams transmitted from the base station, a determining section that determines a leading beam and a secondary beam to combine with the leading beam, based on the basis beam reference signals received, and a transmission section that transmits combination information about combination of the leading beam and the secondary beam to the base station apparatus, are provided.

Abstract: A user equipment (UE) is disclosed including a receiver that receives multiple Channel State Information Reference Signals (CSI-RSs) transmitted from a base station (BS) using first resources; wherein each of the multiple CSI-RSs is associated with each of the first resources. The UE includes a processor that performs resource selection in which at least a second resource is selected from the first resources. The UE includes a transmitter that transmits, to the BS, a first indicator that indicates the second resource. When the processor determines that the first resources are out-of-range in the resource selection, the first indicator indicates that the first resources are out-of-range.

Abstract: Provided are a user terminal, a feedback method at the user terminal, a base station and a method at the base station. The feedback method at the user terminal includes steps of: calculating first information related to receiving signal quality; combining the first information and a response signal to a hybrid automatic repeat request (HARQ) to be transmitted to a base station to generate a combined signal; carrying out signal processing on the combined signal to generate second information; and transmitting the second information to the base station.

Abstract: A hybrid channel quality measurement method is presented. The method includes: performing a first channel measurement according to Channel State Information Reference Signals (CSI-RSs), and transmitting a first channel measurement feedback to a base station according to a first channel measurement result; determining whether to perform a second channel measurement feedback based on Demodulation Reference Signals (DMRSs) after the first channel measurement feedback is performed; and performing a second channel measurement according to the DMRSs when determining to perform the second channel measurement feedback, and transmitting the second channel measurement feedback to the base station according to a second channel measurement result.

Abstract: A wireless communication method includes transmitting, from a base station (BS) to a user equipment (UE), a configuration information indicating a resource used in transmission of a Channel State Information-Reference Signal (CSI-RS) by higher layer signaling; and receiving, with the UE, the CSI-RS from the BS based on the configuration information. The configuration information indicates a mapping for CSI-RS transmission using a single antenna port (AP) to a single resource element per a resource block. In other aspects, a UE, a BS, and a system are also disclosed.

Abstract: A method and an apparatus for rate matching interleaving for polar codes are provided. The method includes: obtaining a first codeword bit sequence; dividing the first codeword bit sequence to obtain one or more segments; performing intra-segment and/or inter-segment interleaving on the one or more segments to generate an interleaved bit sequence.

Abstract: An embodiment of present disclosure provides a method of transmitting channel state information reference signals, and a base station. An embodiment of the present disclosure provides a method of transmitting channel state information reference signals (CSI-RSs), which is executed by a base station, and this method includes the steps of determining whether or not it is necessary to use aperiodic CSI-RSs in a communication system in which a base station to use periodic CSI-RSs is provided, generating an aperiodic CSI-RS trigger signal and communicating the aperiodic CSI-RS trigger signal to a mobile station when aperiodic CSI-RSs need to be used, and communicating aperiodic CSI-RSs to the mobile station in accordance with the aperiodic CSI-RS trigger signal.

Abstract: A user equipment in a wireless communication system includes a configuration information management unit configured to retain configuration information for transmitting a reference signal used for measuring interference in other user equipments, and a signal transmitter configured to transmit the reference signal based on the configuration information. When transmission of the reference signal contends with transmission or reception of another signal, the signal transmitter determines whether the reference signal is to be transmitted or not based on a predetermined priority level.

Abstract: An embodiment of the present invention provides a sounding reference signal (SRS) transmission method, a base station, and a user equipment, the SRS transmission method including: generating SRS configuration information for at least two UEs, such that an SRS of a first type of UE of the at least two UEs is non-orthogonal with an SRS of a second type of UE of the at least two UEs; transmitting the SRS configuration information of the at least two UEs.

Abstract: A terminal is disclosed including a receiver that receives a downlink control information and a downlink shared channel that is scheduled by the downlink control information. The terminal also includes a processor that determines an allocation of the downlink shared channel in a time domain based on a first timing indicated by a first time unit and a second timing indicated by a second time unit that are obtained from information notified by the downlink control information. In other aspects, a radio communication method is also disclosed.

Abstract: The present invention is designed to appropriately select PUCCH resources used to transmit HARQ-ACK. According to one aspect of the present invention, a user terminal has a control section that monitors candidate resources of one or more downlink (DL) control channels (DL) transmitted in multiple different time and/or frequency resources, and detects one or more downlink control information (DCI), and a transmission section that transmits delivery acknowledgment information in response to a downlink (DL) data channel by using an uplink (UL) control channel, and the control section selects resources for the UL control channel based on the DCI.

Abstract: A method of beam information feedback in a wireless communication system is disclosed including transmitting, from a base station (BS) to a user equipment (UE), reference signals using multiple beams, and transmitting, from the UE to the BS, first feedback information that indicates at least one of a first correlation level between a pair of beams within each of beam groups and a second correlation level between a pair of the beam groups. The multiple beams are grouped into the beam groups.

Abstract: A user equipment (UE) includes a receiver that receives a Reference Signal (RS) from a base station (BS), and a transmitter that transmits, to the BS, only precoding-related information used for precoding in the BS in response to the RS. The precoding-related information is at least one of a RS Resource Indicator (RRI) that identifies a radio resource used for RS BS transmission, a Precoding Matrix Indicator (PMI), a Rank indicator (RI), and a Reference Signal Received Power (RSRP). The transmitter only periodically transmits the only precoding-related information. The receiver receives a signal precoded using the precoding-related information by the BS.

Abstract: A user equipment (UE) is disclosed including a receiver that receives resource set information that indicates the number of selectable Channel State Information Reference Signal (CSI-RS) resources between a first CSI-RS group and a second CSI-RS group, CSI-RSs using first CSI-RS resources in the first CSI-RS group, and CSI-RSs using second CSI-RS resources in the second CSI-RS group. The UE includes a processor that selects at least a CSI-RS resource from the first CSI-RS resources and the second CSI-RS resources based on the resource set information. The UE includes a transmitter that performs CSI reporting that indicates the selected CSI-RS resource.

Abstract: To properly perform communication also in the case of supporting activation of a plurality of BWPs, a user terminal according to one aspect of the present disclosure has a receiving section that receives downlink control information for indicating activation of a predetermined BWP among one or more partial frequency bands (BWP: Bandwidth Part) configured within a carrier, and a control section that controls activation of one or a plurality of BWPs based on at least one of the downlink control information, MAC control information and higher layer signaling.

Abstract: A terminal is disclosed including a processor that increments a beam failure instance counter in a higher layer, based on a beam failure instance indication received from a physical layer; a transmitter that, when the beam failure instance counter is greater than or equal to a predetermined threshold, transmits a random access preamble based on a transmission instruction from the higher layer; and a receiver that monitors, within a predetermined response window period, a physical downlink control channel (PDCCH) for a response to the random access preamble based on a predetermined search space setting. In another aspect, a radio communication method for a terminal is also disclosed.

Abstract: To determine an appropriate spatial resource for an uplink control channel. A user terminal includes a receiving section that receives, by a higher layer, a plurality of pieces of spatial relation information related to spatial resources for an uplink control channel, and receives, through a medium access control-control element, indication information indicating at least one piece of spatial relation information associated with at least one uplink control channel resource among the plurality of pieces of spatial relation information, and a control section that determines a partial band to which the indication information is applied, and controls transmission of an uplink control channel in the partial band by using the at least one piece of spatial relation information and the at least one uplink control channel resource.

Abstract: To perform a beam failure recovery procedure by using an appropriate radio resource, a user terminal includes a transmitting section that transmits a beam failure recovery request, and a control section that controls transmission of the beam failure recovery request by using at least one of an uplink shared channel, an uplink control channel, a sounding reference signal, and a random access channel indicated by a downlink control channel.

Abstract: To appropriately configure frequency resources used for a beam failure recovery procedure, a user terminal includes: a transmitting section that transmits a beam failure recovery request when detecting a beam failure; a receiving section that receives a response to the beam failure recovery request; and a control section that controls determination of at least one of a frequency resource used to transmit the beam failure recovery request, and a frequency resource used to receive the response.