Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive and measure channel state information (CSI) reference signals (CSI-RS)s transmitted by a network entity. The UE may select and report downlink and uplink beams separately based on the measurements of the CSI-RS. Selecting and reporting the downlink and uplink beams separately may increase throughput in the case that the best uplink beam is different from the best downlink beam. Additionally, a UE may select an uplink beam on which the UE does not limit transmission power for maximum possible exposure (MPE) reasons. The network entity may indicate to the UE, for example via radio resource control (RRC) signaling, whether to select and report a downlink beam and an uplink beam separately or jointly.

A repeater device receives a first configuration that associates reference signal (RS) resources and receive/transmit (Rx/Tx) beam pairs configurable at the repeater device for repeating one of: (i) a downlink (DL) radio frequency (RF) signal received on a backhaul link from the base station to a user equipment (UE) over an access link; and (ii) an uplink (UL) RF signal from the UE to the base station. The device: receives a second configuration for measuring and reporting self-interference of a first list of the RS resources; configures the repeater device with Rx/Tx beam pairs identified in the first list of RS resources; measures self-interference received on an Rx beam of first Rx/Tx beam pairs; and generates and forwards, to the base station, a self-interference measurement report comprising a second list of Rx/Tx beam pairs from the first list of Rx/Tx beam pairs that cause self-interference above a threshold value.

Systems, methods, and circuitries are provided for performing beamforming in sidelink communication. In one example, a method includes transmitting reference signals to a receiving (RX) UE using different transmit (TX) beams; receiving a signal indicative of an initial TX beam from the RX UE; detecting degradation of a link associated with the initial TX beam; and in response, selecting a revised TX beam for transmitting subsequent sidelink transmissions to the RX UE.

A beam determining method is applied to a network device, and includes: determining beam configuration information, wherein the beam configuration information at least includes parameters configured to indicate a receiving beam corresponding to at least one of N repeated transmissions of a downlink channel, where N is a natural number; and determining a transmitting beam corresponding to the at least one of the N repeated transmissions according to beam parameters corresponding to the at least one of the N repeated transmissions of the downlink channel.