APPARATUS AND METHOD FOR BEAM SEARCHING USING ACTIVE RECONFIGURABLE INTELLIGENT SURFACE IN WIRELESS COMMUNICATION SYSTEM

原文（中国語）

Disclosed is an apparatus and method for beam searching using an active reconfigurable intelligent surface in wireless communication systems. An Active Reconfigurable Intelligent Surface (Active RIS) operating method includes: receiving a control command for beam searching from a base station; determining a target RIS beam area according to the control command; setting differential amplification gain for each beam in the target area; processing a search signal received from the base station according to the set differential amplification gain and transmitting to a corresponding beam area; receiving measurement results from the base station; analyzing the measurement results to estimate terminal position and setting a next search target area when additional searching is needed; and relaying communication signals through an RIS beam corresponding to the estimated terminal position. The differential amplification gain includes basic reference gain and differential contrast gain, enabling efficient beam searching with reduced sweeping cycles.