This specification provides a beam failure recovery method in a wireless communication system. In this specification, a beam failure recovery method performed by a UE includes: receiving, from a base station, control information related to a candidate beam configuration for the beam failure recovery; selecting an RS having a quality of the threshold or more among the RSs related to the candidate beam identification; and; transmitting, to the base station, a beam failure recovery request based on an uplink (UL) resource related to the selected RS.

A method and user equipment (UE) for configuring a secondary cell in a dual connectivity (DC) mode by a UE. The method includes connecting to a primary cell and the secondary cell based on configurations received from a network, identifying at least one parameter related to performance of the UE for the secondary cell, comparing the at least one parameter with a threshold and releasing connection with the secondary cell based on a result of the comparison.

The present invention discloses a power control apparatus and method in a wireless communication system. According to the present invention, among FUE units neighboring to an MUE unit of a victim cell, an FUE unit of an aggressor cell may be derived on the basis of information on RSRP of the FUE unit registered in a closed subscriber group, and a threshold interference value of the FUE unit. Also, power of the derived FUE unit of the aggressor cell may be gradually decreased until an interference of the MUE unit of the victim cell becomes greater than a predefined threshold interference value, and an SINR of the FUE unit of the aggressor cell becomes equal to or greater than a target SINR. Accordingly, CCI can be reduced in a heterogeneous network environment, data transmission speed can be improved, and latency time can be reduced by reducing feedback time.

A wireless device receives one or more messages comprising configuration parameters. The configuration parameters indicate pathloss reference signals (RSs) for PUSCH pathloss estimation for transmissions via first and second panels. A medium access control control element (MAC CE) is received. The MAC CE indicates first pathloss RSs of the plurality of pathloss RSs for the first panel. The MAC CE indicates second pathloss RSs of the plurality of pathloss RSs for the second panel. A downlink control information (DCI) is received. The DCI indicates a first pathloss RS. The DCI indicates a second pathloss RS. The wireless device transmits, via the first panel, a first uplink transport block with a first uplink transmission power determined based on the first pathloss RS. The wireless device transmits, via the second panel, a second uplink transport block with a second uplink transmission power determined based on the second pathloss RS.

A wireless device receives a DCI from a base station. The DCI comprises a power control command of an uplink shared channel, a CSI request field, a hybrid automatic repeat request process number, and a redundancy version. Validation of the DCI for an activation of a semi-persistent CSI reporting is performed based on: a radio network temporary identifier of the semi-persistent CSI reporting, the hybrid automatic repeat request process number being set to a first value, and the redundancy version being set to a second value. The semi-persistent CSI reporting indicated by the CSI request field is activated in response to the validation being achieved. A semi-persistent CSI report is transmitted, based on the activated semi-persistent CSI reporting, via the uplink shared channel with a transmission power determined based on the power control command.

A wireless device receives a DCI from a base station. The DCI comprises a power control command of an uplink shared channel, a CSI request field, a hybrid automatic repeat request process number, and a redundancy version. Validation of the DCI for an activation of a semi-persistent CSI reporting is performed based on: a radio network temporary identifier of the semi-persistent CSI reporting, the hybrid automatic repeat request process number being set to a first value, and the redundancy version being set to a second value. The semi-persistent CSI reporting indicated by the CSI request field is activated in response to the validation being achieved. A semi-persistent CSI report is transmitted, based on the activated semi-persistent CSI reporting, via the uplink shared channel with a transmission power determined based on the power control command.

A wireless device includes a radio, a first directional antenna, a second directional antenna, an omnidirectional antenna, and a switch selectively coupled between the radio and the first directional antenna, the second directional antenna, and the omnidirectional antenna. A processor is coupled to the switch and to, for a frame: determine, based on an arbitration table, a destination medium access control address of a client wireless device and identifiers of antennas for transmitting the frame and receiving acknowledgement data; cause the switch to couple the radio to the first directional antenna; transmit the frame to the client wireless device via the first directional antenna, wherein the first client wireless device is located along a first direction with respect to the wireless device; cause the switch to couple the radio to the omnidirectional antenna; and receive an acknowledgment, corresponding to the frame, from the client wireless device via the omnidirectional antenna.

A wireless device includes a radio, a first directional antenna, a second directional antenna, an omnidirectional antenna, and a switch selectively coupled between the radio and the first directional antenna, the second directional antenna, and the omnidirectional antenna. A processor is coupled to the switch and to, for a frame: determine, based on an arbitration table, a destination medium access control address of a client wireless device and identifiers of antennas for transmitting the frame and receiving acknowledgement data; cause the switch to couple the radio to the first directional antenna; transmit the frame to the client wireless device via the first directional antenna, wherein the first client wireless device is located along a first direction with respect to the wireless device; cause the switch to couple the radio to the omnidirectional antenna; and receive an acknowledgment, corresponding to the frame, from the client wireless device via the omnidirectional antenna.

To measure received quality appropriately. A user terminal according to one aspect of the present invention includes: a receiving section that receives a reference signal in one or more reference signal resources for a measurement of a channel state; and a measurement section that measures a first received power of the reference signal and a second received power in radio resources associated with the one or more reference signal resources, wherein the measurement section derives received quality of a cell, based on the first received power and the second received power.

Disclosed in the present application are a signal transmission method and device. The method comprises: a receiving node receiving a request-to-send signal sent by a sending node; and the receiving node sending, according to the request-to-send signal, an allow-to-send signal to the sending node, the allow-to-send signal comprising beam information concerning N candidate beams.