A base station may identify one or more beams toward a node for communication with at least one UE. The one or more beams may correspond to a plurality of beams from the node. The base station may transmit, to the node, an indication to adjust a surface phase of the node corresponding to the one or more beams or one of the plurality of beams from the node. The base station may select at least one beam of the plurality of beams from the node for communication with the at least one UE. The base station may communicate with the at least one UE via the node and the at least one beam. The at least one beam of the plurality of beams from the node may be based on a defocusing operation associated with a virtual focal point.

A base station may identify one or more beams toward a node for communication with at least one UE. The one or more beams may correspond to a plurality of beams from the node. The base station may transmit, to the node, an indication to adjust a surface phase of the node corresponding to the one or more beams or one of the plurality of beams from the node. The base station may select at least one beam of the plurality of beams from the node for communication with the at least one UE. The base station may communicate with the at least one UE via the node and the at least one beam. The at least one beam of the plurality of beams from the node may be based on a defocusing operation associated with a virtual focal point.

The present disclosure relates to a mobile terminal, a base station and respective operation methods. The mobile terminal comprises circuitry, which in operation assumes that a base station is configured to use one of a plurality of transmission beams, receives a downlink control channel candidate and a corresponding demodulation reference signal using one of a plurality of reception beams corresponding to the assumed one of the plurality of transmission beams, performs channel estimation based on the received demodulation reference signal, and, depending on the quality, demodulates the downlink control channel candidate using the channel estimation. The channel estimation is performed using a demodulation reference signal sequence which is generated observing an association which is associating the generated sequence with the assumed one of the plurality of transmission beams such that at least two of the plurality of transmission beams are associated with different demodulation reference signal sequences.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit a measurement report based at least in part on a set of measurements of one or more reference signals received using a set of candidate beams; transmit a negative acknowledgement for a downlink transmission scheduled for one or more beams of the set of candidate beams; and monitor one or more new beams of the set of candidate beams for a retransmission of the downlink transmission. Numerous other aspects are provided.

A method for receiving system information (SI) by a terminal in a wireless communication system supporting carrier aggregation (CA), according to one embodiment of the present specification, comprises: transmitting an RRC connection request message to a base station; receiving an RRC connection setup message from the base station; transmitting an RRC connection setup complete message to the base station; receiving an RRC reconfiguration message related to configuration of a secondary cell (SCell) from a primary cell (pCell) of the base station; and receiving a synchronization signal (SS) from the SCell based on the RRC reconfiguration message.

A method for receiving system information (SI) by a terminal in a wireless communication system supporting carrier aggregation (CA), according to one embodiment of the present specification, comprises: transmitting an RRC connection request message to a base station; receiving an RRC connection setup message from the base station; transmitting an RRC connection setup complete message to the base station; receiving an RRC reconfiguration message related to configuration of a secondary cell (SCell) from a primary cell (pCell) of the base station; and receiving a synchronization signal (SS) from the SCell based on the RRC reconfiguration message.

Disclosed are a method and device for transmitting an uplink channel for multiple transmission reception points (TRPs) in a wireless communication system. A method for transmitting an uplink channel, according to one embodiment of the present disclosure, may comprise the steps of: mapping the uplink channel to N (N is an integer greater than or equal to 2) resource regions within one slot; and transmitting the mapped uplink channel to a network. The N resource regions include a first resource region and a second resource region, the uplink channel mapped to the first resource region is transmitted on the basis of a first transmission beam, the uplink channel mapped to the second resource region is transmitted on the basis of a second transmission beam, and at least a start symbol in each of the first resource region and the second resource region may include a reference signal.

Methods and apparatuses for transmission or reception using beamforming in a wireless communication system are disclosed herein. In one method, a user equipment receives a second signal indicating a first information. The UE derives at least one specific UE beam based on the first information. The UE uses the at least one specific UE beam to receive or transmit at least one transmission, in which the at least one transmission is periodic channel state indication, scheduling request, and/or scheduling information for downlink assignment or uplink resource.

Methods and apparatuses for transmission or reception using beamforming in a wireless communication system are disclosed herein. In one method, a user equipment receives a second signal indicating a first information. The UE derives at least one specific UE beam based on the first information. The UE uses the at least one specific UE beam to receive or transmit at least one transmission, in which the at least one transmission is periodic channel state indication, scheduling request, and/or scheduling information for downlink assignment or uplink resource.

Systems and methods relating to transmission and use of Discovery Reference Signal (DRS) signals are disclosed in herein. In some embodiments, a method of operation of a Transmission Point (TP) in a cellular communications network comprises transmitting, from the TP, a same one or more DRS signals using at least two different transmit beams in at least two different time resources. Each transmit beam is characterized by a direction in which it is transmitted. In this manner, the TP is enabled to reuse DRS resources, which in turn enables transmission of DRS signals on a larger number of transmit beams and, correspondingly, adaptation of measurement procedures at wireless devices to obtain measurements on those transmit beams.