Systems, methods, and apparatus for beam steering and switching are disclosed. In one or more examples, a method for operating a communication system comprises switching, at least one switch in a rearrangeable switch network, to control input levels to power amplifiers in a power distribution network. The method further comprises outputting, by the power amplifiers in the power distribution network, power to a plurality of antenna elements. Further, the method comprises steering and distributing power, by the antenna elements, in beams associated with each of the antenna elements according to a level of the power in each of the antenna elements.

Disclosed are a method and an apparatus by which user equipment controls transmission power of a sidelink signal in a wireless communication system that supports a sidelink, according to various embodiments. Disclosed are a method and an apparatus by which user equipment controls transmission power of a sidelink signal in a wireless communication system that supports a sidelink, wherein the method comprises the steps of: calculating required power for each antenna unit included in a plurality of antenna units to which the sidelink signal is transmitted; determining reference transmission power on the basis of the required power calculated for the plurality of antenna units; and allocating transmission power for the plurality of antenna units on the basis of the reference transmission power.

Disclosed are a method and an apparatus by which user equipment controls transmission power of a sidelink signal in a wireless communication system that supports a sidelink, according to various embodiments. Disclosed are a method and an apparatus by which user equipment controls transmission power of a sidelink signal in a wireless communication system that supports a sidelink, wherein the method comprises the steps of: calculating required power for each antenna unit included in a plurality of antenna units to which the sidelink signal is transmitted; determining reference transmission power on the basis of the required power calculated for the plurality of antenna units; and allocating transmission power for the plurality of antenna units on the basis of the reference transmission power.

Embodiments of the present disclosure provide a beamforming method and device based on phase shifter switching control, and a system. The method includes: acquiring a channel vector of a channel of each of low-load terminals; acquiring, based on the channel vector, contribution degrees of phase shifters corresponding to the channel; sequentially changing a connected state of each of the phase shifters from closing to opening based on the contribution degrees of the phase shifters corresponding to the channel, calculating a to-be-processed signal-to-interference-plus-noise ratio (SINR) of the low-load terminal after changing the connected state of the phase shifter once, stopping to change the connected state of the phase shifter if the to-be-processed SINR meets a preset condition, and changing the connected state of the phase shifter meeting the preset condition to the closing.

A method performed by an open radio access network (O-RAN) distributed unit (O-DU) in a wireless communication system, the method includes: generating a control plane message comprising User Equipment (UE) scheduling information; and transmitting the control plane message to an open radio access network (O-RAN) radio unit (O-RU). The control plane message further includes section extension information. The section extension information comprises bit masking information indicating antennas to be combined.

Various aspects to reduce interferences in presence of a reconfigurable intelligent surface (RIS) are provided. In an aspect, a first device perform a first transmission using a first set of beams of the first device in response to an activated RIS for serving a second device to facilitate communication between the first device and the second device not being present. The first device may further perform a second transmission using a second set of beams of the first device in response to the activated RIS being present, the second set of beams being a subset of the first set of beams that excludes one or more beams of the first set of beams.

A design for reference signals dedicated for positioning measurements in UL and DL directions and a mechanism for Tx/Rx beam pair selection for positioning is disclosed. The design can improve performance of positioning operation in NR communication systems, can improve resource efficiency of positioning operation in NR communication systems, and can reduce the amount of resources needed for PRS transmission, reduce latency and increase the positioning measurement quality.

A relay device relaying, to a reception device, a signal stream transmitted by a transmission device through MIMO transmission, the relay device including a lattice base reduction processing unit transforming bases of the signal stream transmitted by the transmission device through MIMO transmission, to increase orthogonality of a lattice of the signal stream, a MIMO equalization unit detecting, by equalization, reception symbols in the signal stream with the bases transformed by the lattice base reduction processing unit, a symbol quantization unit performing quantization by mapping the reception symbols detected by the MIMO equalization unit, to a region on a complex plane delimited by quantization threshold values, and a transmission unit transmitting, to the reception device, at least a signal quantized by the symbol quantization unit.

A relay device relaying, to a reception device, a signal stream transmitted by a transmission device through MIMO transmission, the relay device including a lattice base reduction processing unit transforming bases of the signal stream transmitted by the transmission device through MIMO transmission, to increase orthogonality of a lattice of the signal stream, a MIMO equalization unit detecting, by equalization, reception symbols in the signal stream with the bases transformed by the lattice base reduction processing unit, a symbol quantization unit performing quantization by mapping the reception symbols detected by the MIMO equalization unit, to a region on a complex plane delimited by quantization threshold values, and a transmission unit transmitting, to the reception device, at least a signal quantized by the symbol quantization unit.

Aspects of the disclosure relate to beam configuration for RF repeaters. An RF repeater is configured to measure received power of one or more signals in the repeater for each of a plurality of beam directions. Further, the repeater determines a beam forming configuration for a fronthaul link between the repeater and at least one base station based on the measured received power of each of plurality of beam directions. The repeater may also be configured to determine beam configurations for access links between the repeater and user equipment.