This disclosure discloses a communication method and apparatus. In the method, a reflector is used to assist in communication between a terminal and an access network device, and in a reflector-assisted communication process, the reflector is indicated to be in a working mode when being required by the terminal or the access network device, to assist in communication, and the reflector is indicated to be in a sleep mode when being required by the terminal or the access network device, to reduce power consumption.

A passive self-announcing reconfigurable intelligent surface (RIS). The passive self-announcing RIS includes reconfigurable elements configured for controllable reflections, and self-conjugating elements disposed together with the reconfigurable elements on a single passive reflective surface. The present invention can be used in a variety of applications including, but not limited to, RIS presence detection, RIS communication systems, and RIS signal propagation.

A beam updating method in a reconfigurable intelligent surface (RIS) is provided. The method includes: receiving data from a base station using a first polarization and receiving an RIS beamforming reference signal using a second polarization; fixing the reflection direction of the first polarization and sequentially changing the reflection direction of the second polarization to transmit reflected waves; and adjusting the direction of the second polarization based on optimal second polarization direction control information determined according to channel power values corresponding to the reflection direction of the second polarization.

Systems, methods, and computer-readable media for detecting and localizing a position of an unmanned aerial vehicle (UAV) in an environment. Particularly, a management computer can orchestrate the detection and localization of the UAV using base stations that are part of a cellular network infrastructure, reconfigurable intelligent surfaces (RIS) disposed about the environment, and one or more reference nodes. One or more base stations can transmit detection and localization signals towards one or more RIS instances to direct signals upwards towards UAVs disposed at or above the base stations using various configurations of the RIS instances. Angles of departure or arrival of the localization signal can be used to determine a position of the UAV. After localizing the UAV, a notification message specifying the derived position of the UAV in the environment can be generated.

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.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a reflecting device may generate a multi-peak reflection beam that spatially multiplexes a first reflected signal of a first signal and a second reflected signal of a second signal. The reflecting device may receive the first signal and the second signal. The reflecting device may reflect the first signal and the second signal to output a spatially multiplexed reflected signal using the multi-peak reflection beam. Numerous other aspects are described.

The present disclosure relates to methods, apparatuses, and systems that support reconfigurable intelligent surface (RIS) management in wireless systems. For instance, aspects of the disclosure enable operational aspects of an RIS to be controlled to reduce signal interference caused by operation of the RIS. Aspects of the disclosure also enable RIS control to be allocated between different base stations, such as to enable base stations to access an RIS for providing signal communication for UEs served by the base stations.

Sending methods for an assistance communication device, communication apparatuses, and storage mediums are provided. The method includes: obtaining indication information for the assistance communication device, where the indication information includes at least one of channel state information (CSI) or a sending scheme; and executing precoding for the assistance communication device based on the indication information, to implement transceiving of signals.

A method and apparatus for RIS state feedback and receiving are presented. The method for RIS state feedback includes: a RIS controller feeds back state information to a base station (BS), wherein the state information includes state information of the RIS controller and state information of a plurality of RIS boards managed by the RIS controller. An RIS controller feeds back state information about itself and a RIS board managed thereby to a base station, and the BS can effectively manage states of the RIS controller and the RIS board managed thereby, and detect and process network performance deterioration caused by an abnormality in the state of the RIS controller or the RIS board in time, thereby achieving the effect of improving the network performance.

The present disclosure relates to methods, apparatuses, and systems that support reconfigurable intelligent surface (RIS) management in wireless systems. For instance, aspects of the disclosure enable operational aspects of an RIS to be controlled to reduce signal interference caused by operation of the RIS. Aspects of the disclosure also enable RIS control to be allocated between different base stations, such as to enable base stations to access an RIS for providing signal communication for UEs served by the base stations.