Apparatuses, methods, and systems are disclosed for configuration corresponding to a reconfigurable intelligent surface controller. One method includes providing a capability report to a location management function. The capability report corresponds to reconfigurable intelligent surfaces used for positioning. The method includes transmitting control information to a reconfigurable intelligent surface controller for reflecting a positioning reference signal received from a transmitting device and directed to a receiving device. The method includes transmitting a multi-port positioning reference signal configuration to the receiving device. The method includes transmitting, to the receiving device, information indicating to report measurements corresponding to multi-port positioning reference signals reflected from multiple reconfigurable intelligent surfaces.

This application discloses a beam training method and apparatus, a terminal device, and a network device. The beam training method in this application includes: measuring at least two reference signals used for beam training and forwarded by an auxiliary device in at least two forwarding modes to obtain measurement information, where the measurement information is used for indicating an optimal forwarding mode of the auxiliary device, and a forwarding mode of the auxiliary device is determined by using a beam direction of a forwarded signal of the auxiliary device and a beam phase of the forwarded signal of the auxiliary device; and reporting the measurement information to a network device.

A node may receive, from a base station, one or more indications of one or more IRS configurations. The node may correspond to an MT unit. At least one of the one or more IRS configurations may include a surface phase configuration. Each of the one or more IRS configurations may be associated with at least one destination IRS tile. The node may route the one or more indications of the one or more IRS configurations to one or more IRS tiles of a plurality of IRS tiles connected to the node based on one or more indications of one or more destination IRS tiles associated with the one or more IRS configurations.

A multi-layer reconfigurable reflective intelligent surface (RIS). The RIS includes a unit-cell of a reconfigurable intelligent surface. The unit-cell includes a first layer composed of a conductive material and structured according to a sub-wavelength reflective pattern. The first layer reflects an impinging wave at a predetermined phase and steers the reflected impinging wave toward an intended receiver. The unit-cell includes a second layer composed of a first dielectric substrate material. Between the first and second layers, the unit-cell includes a middle layer composed of a second dielectric material having tunable dielectric properties. Tuning a dielectric constant of the second dielectric material modifies the predetermined phase of reflection of the impinging wave.

A node may identify a node configuration including one or more surface phase configurations associated with the node. In one configuration, the node may receive, from the base station, an indication of the node configuration. In another configuration, the node may select, at a controller associated with the node, the node configuration. The one or more surface phase configurations may be based on a wavelength corresponding to a center of a BWP associated with the one or more wireless signals or a wavelength corresponding to a center of a resource allocation associated with the one or more wireless signals. The node may forward, from a base station to a UE, or from the UE to the base station, one or more wireless signals. The forwarded one or more wireless signals may be associated with a beam squint less than a first threshold.

A system for reflecting an RF signal comprises a plurality of antenna units (2) configured to receive and passively reflect the RF signal, and a reference antenna (6′). Each antenna unit (2) comprises a respective phase shifter (8) operable to adjustably impose a phase change on the RF signal before reflection. The system may be a Large Intelligent Surface (LIS) and the antenna units may be included in an arrangement of separate panel devices. A control system (20) is configured to operate the respective phase shifter (8) to phase align a first analog antenna signal (ASn) with a first analog reference signal (REF), which are received by the respective antenna unit (2) and the reference antenna (6′), respectively, in response to a first RF signal; determine, for the respective phase shifter (8), a first phase setting resulting in phase alignment, and store the first phase setting. The first phase settings enable the system to perform beamforming in reception and/or reflection essentially without power consumption.

The present disclosure provides methods and devices that use the RIS phase shifting ability to provide many degrees of freedom to enable data to be overlaid on transmitted signals. The data overlay is done while the RIS is still beamforming the signal towards the receiver(s). The phase shifting capabilities of the RIS elements can provide amplitude, phase, frequency, and polarization manipulations. These manipulations can help enhance the communication and provide the ability to overlay information. The present application also provides new configuration signaling among devices in a communication network utilizing the RIS and configuration for the RIS.

This application provides a channel information obtaining method and a communications apparatus, to reduce pilot overheads and a delay of obtaining channel information. The method includes: A terminal device receives one or more first reference signals on a d.sup.th port of the terminal device, where the first reference signal is a reference signal from a first network device. The terminal device obtains a first channel vector h.sub.1,d based on the received first reference signal, where h.sub.1,d is a channel vector of a channel between the d.sup.th port of the terminal device and the first network device. The terminal device receives N second reference signals on the d.sup.th port of the terminal device. The terminal device obtains a second channel vector h.sub.2,d based on the received second reference signal.

An apparatus receives reconfigurable intelligent surface (RIS) information in a sidelink message from a controller of an RIS and transmits the RIS information to a base station. A base station receives RIS information for an RIS and transmits, to the RIS, a message indicating for the RIS to stop transmitting the RIS information. An RIS transmits, via a controller at the RIS, a sidelink message comprising RIS information for the RIS and receives, from a base station, an indication to stop transmitting the RIS information

Reconfigurable intelligent surface (RIS) scheduling provided with respect to wireless communication networks is described. A base station or other network entity may serve as a central node to accommodate RIS sense and/or control requests from user equipments (UEs). A RIS scheduling protocol according to some aspects may provide a technique for avoiding potential collision at the RIS sense and/or control phases of operation with respect to RISs deployed in a wireless communication network. Using RIS scheduling, wireless communication networks may avoid or otherwise mitigate situations in which multiple sensing signals negatively impact RIS detection procedures, multiple control signals causing signal processing problems and/or control issues, and/or interference results from un-coordinated control of multiple RISs. Other aspects and features are also claimed and described.