A beam processing method includes that: the RIS array may send beam information about the RIS array to the base station, then obtain at least one target beam index sent by the base station, determine at least one piece of slot position information, determine a phase shift matrix for a target beam corresponding to the target beam index according to a direction of an incident beam, and perform a reflection and/or refraction operation on the incident beam sent by the base station based on the slot position information and the phase shift matrix.

Embodiments of the present disclosure provide methods and apparatuses for RIS node in a communication network. A method performed by a reconfigurable intelligent surface, RIS, node, comprising: communicating with a base station, BS, in a communication network, to attach to the BS, via an access procedure; further communicating with the BS according to scheduling in the communication network, to receive a configuration from the BS; and reflecting wireless signals in the communication network, at least based on the configuration. According to embodiments of the present disclosure, the RIS node can be configured dynamically by a base station. Therefore, embodiments of the present disclosure will provide a communication network with control capability on RIS nodes/devices and make the RIS nodes/devices to have manageable behaviors.

Methods, systems, and devices for wireless communications are described. During an operation for discovering reconfigurable surfaces, a sensing signal may be transmitted. Based on the sensing signal being transmitted, another signal may be detected at the device that transmitted the sensing signal, another device, or both. The device that detects the signal may combine the detected signal with a modulation sequence that is associated with a reconfigurable surface, where the reconfigurable surface may be assigned a set of unique modulation sequences and configured to apply a modulation sequence to received signals. Based on combining the detected signal with the modulation sequence, the device may determine whether the reconfigurable surface is present within a geographic region.

Disclosed is a method for wireless communication for determining the position of a wireless node. The method comprises receiving a set of reference signals from a set of at least four positioning devices, wherein the positioning devices are not arranged in a single plane. A signal propagation delay of each one of the set of reference signals is determined and a position of each one of the set of positioning devices is obtained. A convex localization problem is solved for the wireless node based at least in part on the determined signal propagation delay of each one of the set of reference signals and the position of each one of the set of positioning devices. The position of the wireless node is determined based at least in part on solving of the convex localization problem.

Methods, systems, and devices for wireless communications are described. For instance, a first wireless device may receive, from a controller of a reconfigurable surface, an indication of a capability of the controller of the reconfigurable surface to perform one or more operations associated with communications between the controller and the first wireless device. The first wireless device may communicate first information with the controller of the reconfigurable surface based on receiving the indication of the capability and may communicate with a second wireless device via the reconfigurable surface, where an adjustment for the reconfigurable surface for communicating with the second wireless device is based on the first information.

In an aspect, a wireless node may determine a sub-panel configuration associated with a reconfigurable intelligence surface (RIS) that includes a plurality of sub-panels. The wireless node may transmit or receive one or more signals via one or more sub-panels of the plurality of sub-panels in accordance with the sub-panel configuration.

It discloses a communication system design method based on an intelligent omni-surface, comprising step 1: constructing an optimization problem by minimizing a total power consumption of the communication system as an objective function, the communication system being a communication system based on an intelligent omni-surface; step 2: setting a constraint condition for the optimization problem constructed in the step 1, the constraint condition comprising a minimum rate constraint of a user, a phase shift constraint of the intelligent omni-surface and a length constraint of an allocated time slot; and step 3: solving the optimization problem after setting with the constraint condition to obtain solution for minimizing the total power consumption of the system. When lowest rate requirements of all users are met, the method reduces the total power consumption of the system and realizes omnidirectional coverage of a communication area, and has a good application value.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a network node may transmit, via a beam and via a first subset of intelligent reflection surfaces (IRSs), a first transmission comprising a first reference signal or a first sounding reference signal (SRS) request. The network node may obtain a first signal quality measurement based at least in part on the first transmission. The network node may transmit, via the beam and via a second subset of IRSs, a second transmission, the second transmission comprising a second reference signal or a second SRS request. The network node may obtain a second signal quality measurement based at least in part on the second transmission. The network node may identify at least one IRS based at least in part on the first signal quality measurement and the second signal quality measurement. Numerous other aspects are described.

Aspects of the disclosure include configuring beams of a transmitter and a receiver so that the beam spots from the different nodes overlap, such that the received signals of one or more nodes satisfy a service requirement such as rate value, a gain value or a SNR value, at a reconfigurable intelligent surface (RIS) that is used to redirect a signal between the different nodes. Examples of the transmitter and the receiver may be a base station and one or more user equipment (UE) in a downlink or uplink direction or between two UEs in a sidelink direction. Another aspect of the disclosure is providing control signaling in order to configure the overlapping area of the beam spots. For example, signaling information pertaining to one or more beam parameters is exchanged between the transmitter and the receiver in order to facilitate the beamforming that is performed at each device.

A base station selects, in response to a location request for a UE, RIS(s) to use for positioning purposes for the UE. The base station performs a process with the selected RISs to determine information used to configure the UE with RS configuration for using the selected RIS(s) for the positioning purposes. The base station sends the RS configuration to the UE. An RIS receives signals including RSs to be used for positioning purposes for a UE. The RIS time stamps the signals with the RSs and reflects signals including the RSs and corresponding time stamps. A UE receives a reference signal configuration for using RIS(s), receives RSs based on the configuration, and receives signals comprising RSs that have been reflected from the RIS(s). The UE performs timing estimates based on the received signals and sends indication of the timing estimates toward the base station.