Disclosed are techniques for wireless communication. In an aspect, a network node may determine an estimated location of a user equipment (UE) that is served by a serving base station (BS). The network node may determine a dilution of precision (DOP) requirement with respect to the UE. The network node may determine at least one reconfigurable intelligent surface (RIS) that satisfies the DOP requirement with respect to the UE. The network node may send at least one configuration message to configure the at least one RIS to reflect positioning reference signals to or from the UE. In another aspect, a UE may determine a DOP requirement with respect to the UE. The UE may send at least one configuration message to select at least one RIS that satisfies the DOP requirement with respect to the UE to reflect positioning reference signals to or from the UE.

Aspects of the disclosure relate to a reconfigurable intelligent surface (RIS) controller for controlling a RIS panel to be frequency and/or element dependent, and for operating an adaptive filtering function. The RIS controller may be configured to transmit, to a scheduling entity, a RIS frequency capability indication for indicating communication support of the RIS panel for one or more frequency ranges. The scheduling entity, then, may transmit RIS control information based on the RIS frequency capability indication. In response, the RIS controller may receive the RIS control information and configure the RIS panel based on the RIS control information. Other aspects, embodiments, and features are also claimed and described.

In an aspect, a target UE determines a capability of the target UE associated with reflections of reference signals for positioning (RS-Ps) off one or more reconfigurable intelligent surfaces (RISs), and transmits an indication of the determined UE capability. A position estimation entity (e.g., LMF) receives the indication, and configures a positioning session for the target UE based at least in part upon the indication.

Apparatuses, methods, and systems are disclosed for control information for a digitally controlled surface having reflective elements. One method includes transmitting, from a first network device, a synchronization signal based on a control frame structure to a second network device including a digitally controlled surface having reflective elements. The method includes transmitting control information based on the control frame structure to a controller of the second network device. The control information is transmitted at least partly using a dedicated physical control channel, a sequence, and/or an on-off pattern.

Methods and apparatus are provided. In an example aspect, a method performed by a first wireless communication device of establishing a connection for wireless communication is provided. The method includes receiving, on a first wireless communications channel, information about a reflective surface. The method also includes establishing, based on the information about the reflective surface, the connection for wireless communication with a second wireless communication device via the reflective surface on a second wireless communications channel, wherein the second wireless communications channel is different to the first wireless communications channel.

The technology described herein is directed towards a calibration procedure for remote estimation of the position and orientation of an intelligent reflective surface. The calibration is based on accurate estimation of the relative distances between each element of an intelligent reflective surface and a transmission-reception point, e.g., radar sensor, wireless access point and/or base station. A multifrequency (e.g., dual-tone) calibration signal is transmitted to selected elements of the intelligent reflective surface, with the returned calibration signals used to determine the distance to each selected element, from which distances to other elements are determined, along with the intelligent reflective surface's orientation. An active backscatter tag that boosts the returned signal improves the distance measurement accuracy. From the data obtained, the phase delays along the path linking a target and any element of the intelligent reflective surface, and the path linking that element and the transmission-reception point can be directly determined.

A relay apparatus includes a plurality of reflection elements that applies independent phase shifts to an incoming wave, a communication circuitry that receives transmission point information from one or more transmission points, an element allocation circuitry, and a phase control circuitry. The element allocation circuitry determines the number of communication links to be established via the relay apparatus based on the transmission point information, determines the number of reflection elements to be allocated to each of the communication links, and determines a reflection element to be allocated to each of the communication links according to the number of the reflection elements. The phase control circuitry determines the phase weights so that a beam directed to a reception point being a communication destination of each communication link is generated by a reflection wave generated by each reflection element allocated to each of the communication links.

The present disclosure provides a system and method for supporting beam forming in wireless networks with zero signaling overhead in operation. The system includes a reconfigurable intelligent surface (RIS) controller associated with a RIS panel enabling a communication between an access point and one or more user equipment's (UEs) autonomously in the wireless network. The RIS controller is configured to detect a target UE present in the vicinity of the RIS panel based on one or more signals received from the target UE, localize the target UE to identify a relative position of the target UE with respect to the one or more UEs, and select an optimum reflection coefficient matrix (RCM) associated with the RIS panel to enable beam forming towards the target UE.

A multi-functional reconfigurable intelligence surface (MF-RIS) integrating signal reflection, refraction and amplification and energy harvesting and an application thereof are provided. The MF-RIS can support wireless signal reflection, refraction and amplification and energy harvesting on one surface, to amplify, reflect, or refract a signal through harvested energy, and further enhance effective coverage of wireless signals. When a signal model of the MF-RIS constructed in the present disclosure is applied to a multi-user wireless network, a non-convex optimization problem of jointly designing operation modes and parameters that include BS transmit beamforming, and different components and a deployment position of the MF-RIS is constructed with an objective of maximizing a sum rate (SR) of a plurality of users in an MF-RIS-assisted non-orthogonal multiple access network. Then, an iterative optimization algorithm is designed to effectively solve the non-convex optimization problem, to maximize the SR of the plurality of users.

A display panel assembly, a multi-function assembly, a transceiver assembly, and a wireless communication apparatus. The display panel assembly includes: a base plate; an antenna assembly arranged on the base plate and including one or more antenna units for receiving and transmitting wireless signals; and a metasurface assembly arranged on the base plate and including a plurality of metasurface units for enhancing performance of the wireless signals received and transmitted by the antenna units, in which the antenna assembly and the metasurface assembly each include a transparent structural layer.