The apparatus may be a first network node including a UE, a base station, or a RIS. The first network node may be configured to perform a beam training procedure with a second network node, a third network node, and a fourth network node, where the second network node and the third network node are configurable to provide, between the first network node and the fourth network node, an electromagnetic radiation reflection relay service and a buffering relay service, respectively. The first network node may also be configured to transmit, based on the beam training procedure, at least one of (1) a first communication to the second network node, or a second communication to the third network node, including first information corresponding to an operational state of the second network node and an operational state of the third network node and second information destined for the fourth network node.

The present application discloses a method and device in a node for power control in wireless communications. A first node first measures a first reference signal to obtain a first PL (Pathloss); the first reference signal is a synchronization signal indicating a first identifier, or the first reference signal is spatially correlated with a synchronization signal indicating a first identifier; then calculates first power, and adopts the first power to transmit a first radio signal on a first cell; the calculating first power depends on the first PL and a first parameter value; the first parameter value depends on the first identifier associated with the first reference signal. The present application solves the problem of uplink signal power control in the communication system to reduce complexity and improve performance.

Sidelink reference signal (SL-RS) configurations are determined for transmission from multiple transmitting user equipment devices (UE) to one receiving UE. A master wireless communications device is assigned from among the transmitting UEs, the receiving UE, or a base station. The master wireless communications device assigns a sidelink reference signal configuration to each participating UE. The sidelink reference signal configuration may include a designation of resources for the SL-RS, a cyclic shift, a comb offset, a port, or report configurations. By adding a cyclic shift, comb offset, port, or report configuration, SL-RS signals from the transmitting UEs may be multiplexed and transmitted to the receiving UE using the same sidelink resources. Thus, transmitting UEs may be trained to select optimum beams, according to the assigned SL-RS configuration of each, and may transmit a same transport block (TB), a joint TB, or a different TB.

A method for operating infrastructure equipment in a wireless communications network is provided. The equipment transmits and receives signals from a communication device and a reconfigurable intelligent surface (RIS). During operation, a signature value associated with the communication device is determined, and one or more beams for signal transmission are selected based on the signature value. The selected beams include a direct beam between the infrastructure and the communication device and beams involving the RIS. The infrastructure equipment controls the RIS configuration to generate these beams, enabling efficient signal transmission between the communication device and the infrastructure.

In an aspect, a reconfigurable intelligent surface (RIS) controller may perform one or more channel sensing operations to detect whether there are active transmissions on one or more wireless communications channels from one or more network entities that the RIS controller is configured to assist. The RIS may transition a RIS surface coupled to the RIS controller from a deactivated state to an activated state based on detection of the active transmissions on the one or more wireless communications channels from the one or more network entities that the RIS controller is configured to assist.

A method of inter-cell coordination for intelligent reflecting surface (IRS) assisted wireless network is provided. The method includes: receiving mode information corresponding to a first intelligent reflecting surface and a second intelligent reflecting surface; performing a channel measurement according to the mode information to generate a measurement report; transmitting the measurement report to a serving base station; and performing data transmission via the first intelligent reflecting surface and the second intelligent reflecting surface configured according to the measurement report.

The technology described herein is directed towards remotely controlling the direction and the signal strength of a beam reflected from a reconfigurable intelligent surface. A modular design of interconnected, communicatively coupled fundamental modules of unit cells facilitates a straightforward assembly process in which the aperture of the reconfigurable intelligent surface can be scaled by tiling together the modules. The reconfigurable intelligent surface aperture can be remotely fine-tuned with respect to gain and beam reflection direction upon receiving a control signal (e.g., a nine-bit digital code through infrared). Depending on a given scenario, the reflected beam be controlled to reflect an electromagnetic wave (e.g., mmWave) as a concentrated, high-gain coverage beam in a specified direction, a more expansive, low-gain coverage area beam in the specified direction, or something in between, e.g., medium signal strength and medium coverage area.

The present disclosure relates to a beam configuration technique for a reconfigurable intelligent surface. A method of a base station may comprise: generating first installation information of the base station including information on at least one transmission beam; requesting second installation information of an RIS from an RIS controller, the RIS being located nearby the base station; receiving, from the RIS controller, the second installation information including information on at least one reflection beam of the RIS; and determining at least one shadowed area covered by the at least one transmission beam and the at least one reflection beam based on the first installation information and the second installation information.

A method performed by a network node for handling beam-based communication between a terminal and a radio network node in a wireless communications network. The wireless communication network includes a Reconfigurable Intelligent Surface, RIS, for reflecting radio signals between the terminal and the radio network node. The RIS is controlled by the network node which predicts for each terminal, one or more first communication parameters to be used for the beam-based communication between the terminal and the radio network node. The network node configures each terminal, radio network node and RIS based on the predicted parameters. In response to a predicted change the network node estimates for each terminal, one or more second communication parameters to be used for the beam-based communication. Based on an evaluation of the predicted change, the network node updates the configuration of each terminal, radio network node and RIS according to the second communication parameters.

Disclosed is a communication method using a meta-surface, the communication method including providing, by a base station, a control signal to a beam steering apparatus including a reconfigurable meta-surface; performing, by the beam steering apparatus, time synchronization with the base station by using the control signal; performing, by the beam steering apparatus, beam sweeping with a plurality of different beams formed by reconfiguring the meta-surface; and performing communication, by a user terminal, with the base station by using one of the plurality of beams swept by the beam steering apparatus, wherein the time synchronization, the beam sweeping, and the communication may be performed periodically.