A wireless access point (AP) may communicate with a user equipment (UE) device via reflection off a reflective device having an array of fixed or adjustable reflectors in different orientations. The AP may illuminate different portions of an area by pointing a signal beam to different reflectors and/or by controlling the reflective device to electrically rotate the reflectors. The AP may calibrate the position of the reflective device and may establish wireless communications with the UE device by performing a sweep of signal beams over the reflectors and/or by controlling the reflective device to sweep over different reflector orientations. The AP may track movement of the UE device over time. The AP may sweep the AP beam over a subset of the reflectors around an active reflector to maintain communications with the UE device even as the UE device moves over time.

Provided are a method and device for performing groupcast transmission in a wireless communication system. A transmission terminal can transmit, through a plurality of beams, a discovery signal and a message notifying the starting of a groupcast service, and find the best transmission beam for a reception terminal on the basis of which resource the reception terminal uses to transmit feedback to the message. Thereafter, the transmission terminal can transmit data to the reception terminal by using the best transmission beam.

A user equipment (UE) device may communicate with a wireless access point (AP) via reflection off a reconfigurable intelligent surface (RIS). The RIS may begin to sweep antenna elements over one or more sets of signal beams beginning at an initial time while reflecting signals transmitted by the AP. The UE may record times at which the UE receives reference signals reflected by the RIS. The UE may select an optimal signal beam of the RIS based on the time periods between the initial time and the times at which the reference signals were received. The UE may inform the AP of the optimal signal beam and the RIS may use the optimal signal beam to reflect wireless data between the AP and the UE. Multiple signal beam sweeps may eliminate uncertainty or ambiguity in signal beam selection associated with timing drift or offsets between the RIS and the UE.

In accordance with an embodiment, a method includes sending a first message to a network device includes capability information of a terminal device that indicates antenna ports supported by P frequency domain units of the terminal device, and an antenna port supported by an i.sup.th frequency domain unit in the P frequency domain units includes an antenna port associated with the i.sup.th frequency domain unit and an antenna port that can be switched to the i.sup.th frequency domain unit in antenna ports associated with N.sub.i frequency domain units in the P frequency domain units; and receiving configuration information from the network device, where the configuration information configures at least two sounding reference signal (SRS) resources for a first frequency domain unit of the terminal device, and the first frequency domain unit is associated with first uplink transmission configuration information.

Methods, systems, and devices for wireless communications at a user equipment (UE) are described. Aspects of the described techniques may include the user equipment measuring signal aspects for a plurality of respective receive beams for receiving communications associated with a synchronization signal block transmitted by a base station on a transmit beam. From the measured signal aspects, the UE may determine that a receive beam from the plurality of receive beams is a preferred beam for receipt of communications from the base station transmitted on the transmit beam. With the determined preferred beam, the UE may initiate a beam-sweeping procedure to re-measure the plurality of UE receive beams, where the UE measures the first UE receive beam before measuring others of the plurality of UE receive beams.

A beam sweep configuration of at least one beam sweep is exchanged between nodes of a network. The beam sweep configuration may be indicative of a time-duplex configuration of a plurality of beams of the at least one beam sweep. A beam configuration may be determined based on a receive property of pilot signals transmitted and/or received in the beam sweep.

There are provided mechanisms for configuring resolution of uplink data. An exemplary radio equipment controller (REC) of an access node includes an interface (RCE-RE interface) to a radio equipment (RE) and processing circuitry. The processing circuitry is configured to cause the REC to provide instructions to the RE regarding a resolution in time and/or frequency domain with which beam direction reports are to be transmitted to the REC on the REC-RE interface. The beam direction reports are based on uplink appointed reference symbols for sounding received by the RE on a radio interface and is to be transmitted from the RE to the REC. The REC may thus configure the resolution of the beam direction reports that are received by the REC.

Beam sweep configuration (4001, 4002) of at least one beam sweep (391-394) is exchanged between nodes (101, 102) of a network. The beam sweep configuration may be indicative of a time-duplex configuration of a plurality of beams of the at least one beam sweep (391-394).

Disclosed are an electronic device and a communication method in a wireless communication system. Provided is a transmit-side electronic device in a wireless communication system, the electronic device including a processing circuit configured to determine a group common beam for communication with a group of terminal devices in the wireless communication system, the group of terminal devices comprising one or more terminal devices; and transmit information about the group common beam to at least one of the terminal devices by using the determined group common beam.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station and via a reconfigurable intelligent surface (RIS), a synchronization signal block (SSB) corresponding to a first SSB type configured for RIS-assisted procedures. The UE may select a random access channel (RACH) occasion including multiple physical random access channel (PRACH) transmission slots based at least in part on receiving the SSB corresponding to the first SSB type. The UE may transmit, to the base station, a PRACH communication in the multiple PRACH transmission slots of the RACH occasion. Numerous other aspects are described.