Aspects of the present disclosure relate to a node for wireless communication configured to receive a configuration with parameters for reception and measurement of sensing signals and a second set of parameters for transmitting or reflecting signals, wherein at least one parameter of the first set of parameters indicates a metric of the sensing signals for measurement, and at least one parameter of the second set of parameters indicates at least one condition for outputting signals by transmitting or reflecting the output signals, receive a first sensing signal according to the received configuration, measure a value of the metric for the received first sensing signal according to the received configuration, and determine at least one parameter associated with a second signal based on the measured value of the metric or the condition for outputting the second signal according to the received configuration.

The technology described herein is directed towards a reconfigurable intelligent surface (RIS) based on microelectromechanical systems (MEMS) technology, in which MEMS micro-actuators are coupled to unit cells of the RIS. A unit cell's split ring includes a gap into which a laterally moveable metallic insert, of a laterally moveable beam, is inserted or retracted based on controlled voltages applied to MEMS actuators. When actuated, an actuator pushes the inserts attached to the laterally movable beam respect to the split rings' gaps (e.g., of a unit cell subgroup). The amount of lateral displacement of the metallic inserts is based on the voltages applied to the actuators, which changes the structure of the unit cell's geometry, whereby analog-like tuning of the unit cell's characteristics (including phase shift) is obtained. When combined with the voltage-controlled phase shifts of other unit cells of the RIS, beamforming of a reflected incoming electromagnetic wave is achieved.

A method of operating a re-configurable reflective device, RRD (109) is provided. One or more wireless communication devices (102, 103, 104) are served by an access node (101) via the RRD (109) using multiple spatial data streams. The RRD (109) comprises multiple reflective elements (1094), the multiple reflective elements (1094) being grouped into a plurality of subsets (691-697), the multiple reflective elements (1094) of each subset (691-697) being re-configurable to provide multiple spatial filters. The method comprises obtaining, from the access node (101) and for each subset (691-697) of the plurality of subsets (691-697), a respective first indicator indicative of a respective entry of a respective first codebook and a respective second indicator indicative of a respective entry of a respective second codebook, and reconfiguring, for each subset (691-697) of the plurality of subsets (691-697), the respective multiple reflective elements (1094) to provide a respective one of the multiple spatial filters, based on the respective entry of the respective first codebook and the respective entry of the respective second codebook.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a transmission reception point (TRP) may transmit, to a network node, capability information indicating a capability of the TRP to cycle through a set of beamforming weight-vectors when the TRP is performing a transmission. The TRP may receive, from the network node and based at least in part on the capability information, an indication of one or more beamforming-weight-vectors-cycling parameters. The TRP may perform the transmission by cycling through the set of beamforming weight-vectors based at least in part on the one or more beamforming-weight-vectors-cycling parameters. Numerous other aspects are described.

Provided are a communication method and a communication apparatus. The method comprises: a first device receiving first information, wherein the first information comprises position information of a first intelligent reflection plane and signal processing delay information; and the first device determining a positioning result of a terminal device according to the first information.

A wireless transmit/receive unit (WTRU) may be configured to receive reconfigurable intelligent surface (RIS) discovery information. The RIS discovery information may indicate the presence of a RIS. The WTRU may perform one or more first measurements of one or more first signals to determine a first measurement value. The WTRU may determine that the first measurement value is less than a threshold. The WTRU may send a reservation request to the RIS based on the first measurement value being less than the threshold. The WTRU may perform one or more second measurements of one or more second signals received via the RIS to determine a second measurement value. The WTRU may determine that the second measurement value is less than the threshold. The WTRU may send a RIS configuration update request to the RIS based on the second measurement value being less than the threshold.

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.

A computer-implemented method for detecting the presence of a reconfigurable intelligence surfaces (RIS) device using a radar device includes receiving an analog received (RX) signal using a receiver antenna of the radar device based on a transmitted (TX) signal. The method further includes mixing the TX signal and the analog RX signal to generate an intermediate frequency (IF) signal and processing the IF signal to detect a characteristic of the IF signal that indicates a presence of the RIS device. The method has applications in optimization and/or decision making associated with robots. For instance, based on performing the RIS detection, the robot can optimize its path to survey an environment (e.g., maximize exploration rate that is constrained by the battery of the robot). In some embodiments, machine learning (ML) and/or artificial intelligence (AI) techniques can be used to perform the RIS detection.

A communication system may include a base station (BS), user equipment (UE), and a set of reconfigurable intelligent surfaces (RIS's). The RIS's, the UE, and the BS may communicate using a control RAT and a data RAT. The BS may transmit downlink (DL) signals to the UE device via reflection off a DL RIS. The UE device may transmit uplink (UL) signals to the BS via reflection off a UL RIS. This may optimize wireless performance in situations where reflecting the UL and DL signals off the same RIS would limit performance under the current data RAT channel conditions. The BS and the UE device may use channel measurements of the control RAT at the RIS's to select the UL RIS and the DL RIS. This may significantly reduce overhead required to identify the UL and DL RIS's relative to scenarios where exhaustive beam training is used.

The present disclosure generally relates to a method and a measurement system for characterizing a reconfigurable intelligent surface of a device under test. An incident signal is repeatedly transmitted onto the reconfigurable intelligent surface at an incident angle with respect to the reconfigurable intelligent surface by using a feed antenna. Reflected signals reflected by the reconfigurable intelligent surface are captured by using at least one probe antenna. The reflected signals are captured at different angles of reflection such that a three-dimensional reflection pattern is obtained. A reflected total radiated power for the reconfigurable intelligent surface is determined based on the three-dimensional reflection pattern by using a determination circuit.