A reconfigurable intelligent surface (RIS) may include multiple sub-RIS, and the base station may configure the RIS and the multiple sub-RIS with RIS sync raster including multiple center frequencies. The RIS may be configured to simultaneously apply different water-markings and reflect the incident beam into different beams in different directions. The base station may perform a beam-sweeping by transmitting synchronization signal blocks (SSBs) on multiple SSB beams, and the RIS may receive one SSB beam of the multiple SSB beams and reflect the SSB beams on the RIS sync raster. A UE may be configured to monitor the base sync raster and the RIS sync raster for a suitable SSB beam, and transmit a feedback report to the base station indicating the suitable beam. The base station may configure the RIS based on the feedback report received from the base station for beam management.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station, a configuration of a beam report associated with a set of base station transmit beams, the set of base station transmit beams being directed to the UE via a backscatter link reflected by a backscatter device. The UE may transmit, to the base station, the beam report based at least in part on the configuration of the beam report, the beam report corresponding to the backscatter link. Numerous other aspects are described.

A wireless secure communication method based on RIS-NOMA under complex channel conditions, the method including: firstly, an intelligent surface is assume to be disposed between the base station and legitimate NOMA users, and between the base station and eavesdroppers; the signal to interference plus distortion noise ratio (SIDNR) for the legitimate NOMA user and the eavesdropper is calculated in the presence of RHI in the system; secondly, considering shadow fading and to simplify the overly complex calculation process, the probability density function and cumulative distribution function of the shadow fading are approximated; finally, the outrage probability and intercept probability of the legitimate users and eavesdroppers are calculated.

In Wi-Fi 8, backscatter devices (BKDs) may be viewed as part of the 802.11 wireless local area network (WLAN). BKDs in a WLAN have limited transmission interactions with a Wi-Fi access point (AP). Onboarding BKDs to the WLAN is described, which allows for the AP and BKD to participate as elements of the same local network, with security controls. The onboarding of the BKD to a WLAN may occur after discovery of the BKD at an AP and includes replacing an Initial Device Identifier (IDevID) on the BKD with a Local Device Identifier (LDevID) in order to provide for secure communications between the BKD and the WLAN.

A radar cross-section (RCS) measurement system comprising a reconfigurable intelligent surface (RIS) transceiver positioned relative to a first illumination direction of a target under test (TUT), a RIS reflector positioned relative to a second illumination direction of the TUT, and a controller. The controller is configured to control the RIS transceiver to transmit an electromagnetic (EM) wave towards the first illumination direction of the TUT and the RIS reflector, control the RIS reflector to reflect the EM wave received from the RIS transceiver towards the second illumination direction of the TUT, control the RIS reflector to reflect a scattering of the EM wave received from the second illumination direction of the TUT back to the RIS transceiver, and compute the RCS of the TUT in the second illumination direction of the TUT based on the scattering of the EM wave received from the RIS reflector.

A wireless communication system includes a sensing unit that detects an obstacle currently present between a transmitting station and a receiving station. There is an environment memory that stores information on a detection result of the sensing unit, an environment prediction unit that predicts a variation in a radio wave propagation environment between the transmitting station and the receiving station from the information stored in the environment memory. There is further a simulation calculation unit that simulates an environment in which a communication path between the receiving station and a reflector and a communication path between the transmitting station and the reflector are a line-of-sight environment on the basis of a prediction result of the environment prediction unit and calculates a control parameter of the reflector that achieves the environment. Further, a reflector control unit controls the reflector in accordance with the control parameter calculated by the simulation calculation unit.

The present invention discloses a near-field broadband uplink MIMO transmission method assisted by a dynamic metasurface antenna. The method includes: Broadband signals sent by a plurality of users distributed in a near-field region are processed with a large-size dynamic metasurface antenna as a receive antenna on a base station side, which can reduce system hardware costs and power consumption; and compared with the current hybrid beamforming based on a phase shifter and a conventional antenna, hybrid beamforming based on the dynamic metasurface antenna can effectively improve transmission performance. The present invention proposes an algorithm framework jointly designing a dynamic metasurface antenna and a baseband beamformer and including method such as matrix-weighted mean square error sum (MWMSE) minimization, alternate optimization, matrix vectorization, and MM. The present invention implements near-field broadband large-scale MIMO uplink transmission assisted by a dynamic metasurface antenna with low algorithm complexity and good convergence.

A method (200) for configuring a set of reflectors (120), wherein the set of configurable reflectors are provided by a set of one or more intelligent reflecting surfaces, IRSs (105). The method includes determining (s202) a first set of one or more IRS configuration parameters, wherein the first set of IRS configuration parameters comprises at least one of; (a) a first link quality metric for a first link between a first CD and an access network node, wherein the first link comprises a first channel between the first CD and the set of one or more IRSs and a second channel between the set of one or more IRSs and the access network node; (b) a first quality-of-service, QoS, requirement for the first CD; or (c) a transmission status for the first CD. The method also includes, based on the first set of IRS configuration parameters, partitioning (s204) the set of configurable reflectors, wherein the partitioning comprises defining at least a first subset of the set of configurable reflectors and a second subset of the set of configurable reflectors. The method also includes configuring (s206) the first subset of the configurable reflectors and configuring the second subset of the configurable reflectors.

A wireless communication method is disclosed. The method is performed by a radio access node for selection of a beam for communication with a device. The selection is from a plurality of available beams. The method comprises acquiring channel quality metrics for available beams providing coverage for an area of location of the device, and selecting one of the available beams based on the acquired channel quality metrics. At least one of the available beams is associated with a radio reflector which is specifically arranged to enable the associated beam to provide coverage for the area of location of the device via the radio reflector. For example, two or more available beams may be associated with respective radio reflectors, each radio reflector being specifically arranged to enable the respectively associated beam to provide coverage for the area of location of the device via the radio reflector. Corresponding computer program product, apparatus, radio access node, and wireless communication system are also disclosed.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a reconfigurable intelligent surface (RIS) device may receive a partition configuration indication that is associated with configuring a surface of the RIS device that includes multiple surface partitions, the partition configuration indication associated with activating a first subset of the multiple surface partitions, the first subset of the multiple surface partitions being based at least in part on a location of the first subset on the surface, a geometric shape formed by the first subset, and a beam. The RIS may activate the first subset of the multiple surface partitions. The RIS may deactivate a second subset of the multiple surface partitions, each surface partition in the second subset not being included in the first subset. Numerous other aspects are described.