Abstract: A beam determination method, a downlink transmission decoding method performed in a communication system, and corresponding user equipments and base stations are disclosed. The base station has a plurality of transmission beams, and may dynamically select a beam for transmitting downlink control information and downlink data information from a plurality of beams. The downlink transmission decoding method performed by the user equipment includes: determining M preferred beams in the plurality of transmission beams of the base station; and receiving, through one or more reception beams corresponding to any one or more of N preferred beams in the M preferred beams, downlink control information transmitted by the base station, wherein N?M, the base station transmitting signaling including same downlink control information through the N preferred beams during the transmission time period of the downlink control information.

Abstract: Provided are a method used for indicating and determining a parameter value of Listen-Before-Talk (LBT) parameters, a base station and a user equipment, the method including: determining a parameter value of LBT parameters, the LBT parameters including an LBT type, an LBT priority, and a start position of a physical uplink shared channel PUSCH; determining an index for carrying out joint indication of the LBT parameters on the basis of a subset of a full set which is formed by combining possible parameter values of each LBT parameter; generating downlink control information including the index; and sending the downlink control information to a user equipment.

Abstract: A terminal is disclosed that includes a processor that determines a number of Physical Downlink Control Channel (PDCCH) candidates per aggregation level, based on information about a search space corresponding to a Subcarrier Spacing (SCS) and a receiver that monitors the PDCCH candidates in the search space based on the information about the search space. In other aspects, a radio communication method and a base station are also disclosed.

Abstract: Disclosed are a method for determining a hybrid automatic repeat request (HARQ) process number (HPN) allocated to downlink link (DL) data, a method for notifying a HPN allocated to the DL data, a method for allocating a HPN to DL data, a base station, and a user equipment. The method for determining a HPN allocated to DL data includes: receiving DL control information (DCI) associated with DL data; determining, according to the DCI, whether the DL data satisfies a predetermined condition; and when the DL data satisfies the predetermined condition, determining the HPN allocated to the DL data based on a HPN field and an additional field in the DCI.

Abstract: The present disclosure provides a downlink control information transmission method, including generating more than one downlink control information (DCI) according to scheduling information of a user equipment (UE); determining a detection order of the more than one DCI and positions of the more than one DCI in a searching space; adding a position indication field to a respective DCI according to the detection order of the more than one DCI and the positions of the more than one DCI in the searching space; wherein, the position indication field is used to indicate a position of a next DCI of the respective DCI in the detection order; in which, a position indication field in a last DCI in the detection order is used to indicate a position of a first DCI in the detection order; and transmitting the more than one DCI in the searching space according to the positions of the more than one DCI in the searching space. The present disclosure also provides a UE-side method, a corresponding base station and a UE.

Abstract: The present invention is designed so that communication can be carried out adequately even when the bandwidth to use is limited to partial reduced bandwidths in a system bandwidth. According to an example of the present invention, a user terminal, in which the bandwidth to use is limited to a partial reduced bandwidth in a system bandwidth, has an acquiring section that acquires EPDCCH (Enhanced PDCCH) configuration information based on information that is reported from a radio base station without using a PDCCH (Physical Downlink Control Channel), and a receiving section that detects a user terminal-specific search space (USS: UE-specific Search Space) of an EPDCCH based on the EPDCCH configuration information.

Abstract: In scheduling transmission of UL data in a plurality of subframes using single DCI, asynchronous re-transmission control of this UL data is appropriately performed. A user terminal according to an aspect of the present invention includes a receiving section that receives downlink control information (DCI) and a control section that controls transmission of an uplink shared channel in each of a plurality of subframes based on the DCI. The control section determines an HARQ process number (HPN) to use in each of the plurality of subframes based on a HPN field included in the DCI.

Abstract: The present invention is designed to prevent communication performance from dropping in long TTI when preemption of long TTI by short TTI occurs. According to one aspect of the present invention, a user terminal has a receiving section that receives downlink (DL) data based on downlink control information (DCI) in a first transmission time interval (TTI), a transmission section that transmits delivery acknowledgement information in response to the DL data, and a control section that controls timing of transmitting the delivery acknowledgement information when indication information regarding preemption of the first TTI by a second TTI shorter than the first TTI is received in the receiving section.

Abstract: Provided are a method for controlling a transmission power, a mobile station and a base station. The method for controlling the transmit power can be applied to a mobile station, and the method includes: acquiring a power control pattern, which is information related to a scheme of controlling the transmission power; determining a reference power control parameter for the mobile station according to the power control pattern; and determining the transmission power of the mobile station based on the reference power control parameter. The method for controlling the transmission power according to the embodiments of the present disclosure enables the user equipment to transmit signals to the base station at a proper transmission power, and further enables the base station side to distinguish different user equipments according to differences of received powers of a plurality of users that adopt Non-orthogonal Multiple Access.

Abstract: The present invention is designed so that it is possible to prevent the number of times to perform blind decoding from increasing in cross-carrier scheduling in enhanced carrier aggregation. A user terminal can communicate with a radio base station by using six or more component carriers, and has a control section that exerts control so that, when cross-carrier scheduling is configured by the radio base station and the number of component carriers to be scheduled by a scheduling-source component carrier exceeds a predetermined value, a user terminal-specific search space is determined on a per component carrier basis based on higher layer signaling that configures a CIF (Carrier Indicator Field) value in association with a cell index.

Abstract: A method for notifying a repetition pattern of uplink data, a method for determining a repetition pattern of uplink data, and a corresponding user equipment (UE) and base station are provided, wherein the base station is notified of a repetition pattern selected by the UE, so that the base station can correctly determine a transmitting timing of feedback information, thereby preventing a problem in which a transmitting timing of expected feedback information of the UE is inconsistent with the transmitting timing of the feedback information determined by the base station.

Abstract: In order to measure and report reception quality appropriately in a radio communication system (LAA system) supporting LBT with an unlicensed band, the present invention provides a user terminal capable of communicating with a radio base station using a first frequency carrier configured with LBT (Listen Before Talk). The user terminal has: a control section that, when a beacon reference signal of a connecting cell is detected by LBT, determines that a channel of the connecting cell is in an idle state (LBTidle) and controls to measure reception quality in an LBTidle subframe; an obtaining section that obtains a measurement result of the reception quality in the LBT period; and a transmission section configured to transmit the measurement result.

Abstract: A radio base station is disclosed. The radio base station has a transmitter that transmits downlink (DL) data and a measurement signal to a user terminal and a processor that executes control of transmission of the DL data and the measurement signal based on a result of listening, which is performed before signals are transmitted. The processor applies different conditions to listening that is performed before the DL data is transmitted and listening that is performed before the measurement signal is transmitted.

Abstract: The present invention is designed so that it is possible to feed back HARQ-ACKs adequately even when a plurality of component carriers are configured in a radio communication system. The present invention provides a receiving section that receives DL signals transmitted from a plurality of component carriers (CCs), and a control section that controls transmission of an HARQ-ACK in response to a received DL signal based on a counter DAI included in the downlink control information, and the counter DAI is configured to three or more bits in predetermined downlink control information. Also, the counter DAI can be comprised of varying numbers of bits depending on the number of CCs configured in the user terminal or the number of CCs where listening is applied to DL transmission.

Abstract: The present invention is designed so that communication can be carries out adequately even when the number of component carriers that can be configured in a user terminal is expanded from that in existing systems. According to one aspect of the present invention, a user terminal communicates by using a plurality of component carriers (CCs), and has a data buffering section that stores uplink data, a generating section that generates a BSR MAC CE (Medium Access Control Control Element), in which a given index corresponding to a buffer size is included, based on BSR (Buffer Status Report) tables, in which amounts of uplink data that is stored (buffer sizes) and indices are associated, and a transmission section that transmits the BSR MAC CE, and one of the BSR tables is a first BSR table for use when more than five CCs are configured in the user terminal.

Abstract: A terminal is disclosed including a processor that controls a period to hold an uplink control information (UCI) based on information provided by a downlink control information (DCI) and a transmitter that transmits multiple UCIs, including the UCI held in the period, together. In other aspects, a radio communication method for a terminal and a base station are also disclosed.

Abstract: Some techniques for implementing estimation of channel states with high accuracy and efficient feedback of the channel states in 3D MIMO are disclosed. One aspect of the present invention relates to user equipment for implementing 3D MIMO (3-Dimensional Multiple-Input Multiple-Output) communication, comprising: a channel state information generation unit configured to measure channel states of antenna ports of 3D MIMO antennas in a base station with reference signals transmitted from the antenna ports and generate channel state information based on the measured channel states; and a channel state information feedback unit configured to use different channel state information feedback means for antenna ports in respective dimensions of the antennas to feed the generated channel state information back to the base station.

Abstract: A terminal is disclosed that includes a receiver that performs, using a first time interval or a second time interval, a receiving process for downlink control information indicating a transmission direction per given time interval and a processor that determines the transmission direction based on the downlink control information. In other aspects, a radio communication method is also disclosed.

Abstract: Provided is user equipment of a radio communication system that supports D2D communication, the user equipment including a selector that selects a plurality of control information resources for repeatedly transmitting control information from a control information resource pool and that selects a plurality of data resources for repeatedly transmitting data from a data transmission resource pool; and a transmitter that repeatedly transmits the control information including information that specifies the data resources using the control information resources and repeatedly transmits the data using the data resources, wherein the selector selects the control information resources and the data resources so that a control information resource for transmitting the control information for a first time among the control information resources and a data resource for transmitting the data for a first time among the data resources are in a same subframe.

Abstract: The present invention provides a method for configuring a hybrid automatic repeat request (HARQ) mode in a base station, a communication method for use by user terminal supporting communication capabilities of the first type, a base station and user terminal. This user terminal includes a transmission section that transmits information about a capability for supporting HARQ bundling, to a radio base station, and the transmission section transmits bundled HARQ-ACKs to the radio base station based on the capability.