The technology described herein is directed towards remotely controlling the direction of a beam reflected from a reconfigurable intelligent surface arranged with a two-dimensional array of unit cells. By controlling a variable tuning device (e.g., varactor diodes) per unit cell, a microcontroller can distinctively adjust the phase of each unit cell, which can be the same phase per column of elements. In one implementation, the reconfigurable intelligent surface is reconfigured to change its beam reflection direction upon receiving a remote control signal (e.g., a five-bit digital code through infrared). The code can be mapped to predefined phase profile data of a group of phase profile data options, that is, to a set of varactor voltages selected from available varactor voltage configurations, which is then applied to the varactors. In this way, the reflected beam can be controlled to reflect an electromagnetic wave (e.g., mmWave) in a specified direction.

This application discloses a communication method and apparatus. The method includes: A first network device sends first indication information to M second network devices to indicate time-frequency resources of N reference signals, n.sub.m pieces of beam weight information corresponding to each second network device, and an association relationship between the time-frequency resources of the N reference signals and the n.sub.m pieces of beam weight information. The first network device sends second indication information to a terminal device to indicate the time-frequency resources of the N reference signals. The first network device sends N first downlink reference signals on the time-frequency resources of the N reference signals, and the terminal device receives the N first downlink reference signals, obtains phase information through calculation, and sends the phase information to the first network device. The first network device sends phase compensation information to the second network device based on the phase information.

This application pertains to the field of communication technologies, and provides a communication method and apparatus, to enhance a signal coverage capability of a network device. In the method, a first network device may configure a correspondence between time-frequency resources of M sets of broadcast signaling and N pieces of beam information, to indicate a second network device to adjust a coverage area of the first network device on a time-frequency resource of each set of broadcast signaling by using one piece of beam information corresponding to the time-frequency resource. This can enhance a signal coverage capability of the first network device, so that a terminal device in a signal coverage hole can access the first network device.

A beam measurement method and a related apparatus are disclosed. The method includes: A first network device sends first information and second information to a second network device, where the first information indicates time-frequency resources of N first reference signals and time-frequency resources of K second reference signals; and the second information indicates a first beam weight and M second beam weights, further indicates that a beam of the second network device on the time-frequency resources of the N first reference signals corresponds to the first beam weight, and further indicates that beams of the second network device on the time-frequency resources of the K second reference signals correspond to the M second beam weights.

Embodiments of this application provide a communication method and apparatus to resolve a problem that a signal to interference plus noise ratio (SINR) of an equivalent channel cannot be maximized, and may be applied to an intelligent reflecting surface (IRS) system. The method includes a first network device that sends first indication information and time-frequency resources of N downlink reference signals to a second network device, and sends second indication information, the time-frequency resources of the N downlink reference signals, and the N downlink reference signals to a terminal device. The first network device receives phase reporting information from the terminal device, and sends phase indication information to the second network device, where the phase indication information is determined based on the phase reporting information.

Certain aspects of the present disclosure provide techniques wireless communication at a first wireless node generally including communicating with a second wireless device using a first beam, detecting at least one condition indicative of receiver saturation at the first wireless device or the second wireless device, and taking at least one action designed to mitigate the receiver saturation after detecting the at least one condition.

A system and a method for automatically adjusting a beam direction of a reflector are provided. The system includes: a reflector for reflecting, refracting, or transmitting incident waves of network signals to a specified area; a database, storing optimized setting combinations for specified areas that include an altitude of the reflector and angles thereof with respect to the specified area, making signals of the specified area have maximum intensity; a communication module, receiving a trigger signal; a computing and processing module, retrieving from the optimized setting combination for the specified area according to the area name of the trigger signal; and a control module, adjusting the altitude and angles of the reflector according to the optimized setting combination. The disclosure can automatically detect a specified area needing network service and automatically adjust the reflector for signal intensity enhancement.

In an aspect, a relay UE transmits sidelink reference signals for positioning (SL-RS-P) off first and second reconfigurable intelligent surfaces (RISs). The target UE measures the reflected SL-RS-Ps. In an aspect, the SL-RS-Ps may be associated with configurations that are configured by a base station. In an aspect, a position estimation entity may obtain measurement information associated with the reflected SL-RS-Ps and determine a position estimate of the target UE based at least in part upon the measurement information.

A beam-steering backscatter circuit in an integrated tag device. The circuit includes an antenna array and SP4T reflector array configured to receive and transmit through the antenna array. A baseband phase-shifting module modulates an incident signal based upon tag data to create an output signal and re-radiates the output signal with a controllable angle of direction through the SP4T reflector array. A phase locked loop synchronized with a wake-up receiver provides an intermediate frequency (IF) clock to the baseband phase shifting-module.

The present disclosure relates to a fifth generation (5G) communication system or a sixth generation (6G) communication system for supporting higher data rates beyond a 4G communication system such as long term evolution (LTE). In a wireless communication system, a method performed by a base station includes identifying a delay time caused by a radio unit (RU) buffer, determining an RIS offset value for synchronization of signals transmitted to a reconfigurable intelligent surface (RIS), based on the delay time caused by the RU buffer, transmitting, to the RIS, a first signal to be transmitted to a terminal through a reflection plane of the RIS at a first time point, and transmitting, to the RIS, a second signal for controlling a reflection pattern of the RIS at a second time point to which the RIS offset value is applied.