We disclose a novel methodology and wireless network for covert wireless RF communications between an agent device and a client device in the presence of an adversary device which attempts to detect the existence of the transmission of the RF communication between the agent and client. The methodology comprises: providing an intelligent reflecting surface (IRS) to reflect wireless radio frequency (RF) communication signals transmitted from the agent device to the client device, the IRS comprising a two-dimensional array of individually controllable RF reflecting elements; providing a jamming device which radiates jamming signals with random power to confuse the adversary device in detecting the existence of the communication between the agent device and the client device; and establishing a covert RF communication link between the agent device and the client device using the IRS that optimizes the transmission probability, transmit power at an agent, and the reflection matrix of an IRS for covert RF communications.

A method of beam failure recovery managed by a transmitter of a communication system, includes: detecting a first occurrence of a beam failure between the transmitter and a receiver; based on the detection of the first occurrence of the beam failure, identifying at least one first reconfigurable intelligent surface (RIS) for transmitting at least one reference signal; transmitting the at least one reference signal to the at least one first RIS; receiving, from the at least one first RIS, a receiver feedback for the at least one of reference signal; generating an RIS candidate beam list based on the receiver feedback; and transmitting, to the receiver via the at least one first RIS, a radio resource control (RRC) message including the RIS candidate beam list as a beam failure recovery configuration.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a composite surface system may include a transmissive surface (TS) component capable of transmitting a wireless communication signal incident on the TS component, transmitting the wireless communication signal within a transmissive field-of-view (FoV), and configured to limit signal strength loss of one or more radio frequencies of the wireless communication signal. In some aspects, the composite surface system may include a reflective surface (RS) component capable of reflecting the wireless communication signal within a reflective FoV. The RS component may include a non-uniform pattern region associated with controlling a size of the reflective FoV.

Methods, systems, and devices for large-bandwidth reconfigurable intelligent surface communication (RIS) are described. A network entity (NE) may transmit a first control message to the RIS indicating a frequency and a bandwidth for a carrier of a communication signal to be used to communicate with one or more users. The RIS may transmit to the NE a second control message identifying a quantity for multiple frequency domain segments for the bandwidth of the communication signal. The NE may then communicate a communication signal with the one or more users via the RIS, for each frequency domain segment of the multiple frequency domain segments, on the frequency domain segment during a time occasion of multiple time occasions, each time occasion of the multiple time occasions corresponding to a respective frequency domain segment of the multiple frequency domain segments.

Disclosed are systems, apparatuses, processes, and computer-readable media for wireless communications. For example, according to aspects described herein, a reconfigurable intelligent surface (RIS) can receive a configuration message comprising an indication to reduce a gain of at least a portion of a reflection beam. The RIS can generating reflection coefficients for meta-elements of the RIS based on the configuration message. The RIS can configure the meta-elements based on the reflection coefficients. For instance, based on configuring the meta-elements, the RIS can generate or produce the reflection beam (e.g., a sensing reflection beam or an interference reflection beam) by reflecting a sensing signal received from a sensing transmitter device.

A communication system is disclosed herein. The communication system includes a cellular base station and one or more reconfigurable intelligent surfaces. The cellular base station includes a downward facing antenna array and a first controller. The cellular base station is configured to communicate with a first user equipment above the cellular base station and a second user equipment below the base station. The reconfigurable intelligent surface is positioned below the cellular base station. The reconfigurable intelligent surface includes a reconfigurable panel of reflective elements and a second controller. The reconfigurable intelligent surface is configured to service the first user equipment by reflecting signals from the cellular base station to the first user equipment.

A 5G communication system or a 6G communication system for supporting higher data rates beyond a 4G communication system such as long term evolution (LTE). A reconfigurable intelligent surface (RIS) including a plurality of unit cells in a wireless communication system includes a first pattern included in a top layer of a unit cell included in the RIS, a second pattern included in a bottom layer of the unit cell included in the RIS, and at least one switch configured to electrically ground or short the first pattern and the second pattern in response to a command for determining whether the unit cell included in the RIS operates as a transmissive RIS or a reflective RIS.

An embodiment of a User Equipment (UE) for supporting a communication with IRS in communication networks is disclosed. The UE is configured to receive configuration signal from a network device for configuration of a set of trigger points. Based on the set of trigger points, the UE is configured to detect one or more pilot signals from an IRS controller corresponding to the IRS, and perform measurement of one or more parameters. The UE is configured to transmit a first set of information to the network device based on the detected one or more pilot signals and the measurement of the one or more parameters and receive one or more instructions, for executing a handover procedure for network communication from the network device to the IRS, based on the transmitted first set of information.

Disclosed is a beam steering apparatus that reflects a beam for steering, the beam steering apparatus including a front end unit configured to receive a control signal; and a meta-surface with controllable unit cells arranged in an array, the unit cells including metal plates spaced apart from each other, a variable capacitance element connected between the metal plates, and a line to which a meta-surface control signal is provided; and a computation and control unit configured to generate a meta-surface control signal for controlling the meta-surface according to the control signal wherein the beam reflected from the meta-surface is steered according to the control signal.

Disclosed are techniques for wireless sensing. In an aspect, a sensing node receives, from a sensing server, a configuration for a sensing session to detect one or more target objects, the configuration including one or more parameters defining the sensing session. The sensing node receives assistance data for the sensing session, wherein the assistance data is determined from a digital twin model of an environment of the sensing node, and wherein the assistance data indicates one or more modeled signal quality metrics of reflections from the one or more target objects of one or more sensing signals to be transmitted by one or more transmitter sensing nodes during the sensing session and received at one or more receiver sensing nodes.