Relay Device RIS Positioning via Image Sensor
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Solution Overview
Problem
Existing methods for acquiring terminal position information for reconfigurable intelligent surfaces require an information transmission device, resulting in high overhead and insufficient accuracy for precise positioning.
Innovation Solution
A relay device equipped with a reconfigurable intelligent surface, an image sensor, and a control device that captures and processes image data to directly measure the terminal's position, eliminating the need for network-based information transmission and enhancing accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If terminal position information is transmitted via network using distributed antenna system, then positioning can be achieved, but information transmission device is required and overhead is large
Solution Approach 1:
The patent introduces an image sensor as an intermediary device that captures images of the terminal. This mediator converts the terminal position detection problem into an image processing problem, eliminating the need for complex network-based distributed antenna systems while achieving accurate positioning through image coordinate extraction and conversion to real-world coordinates
Solution Approach 2:
The patent replaces the mechanical/electromagnetic system of distributed antennas and network signal transmission with an optical system using an image sensor. This substitution captures terminal position information optically through imaging, converting it into electrical signals for processing, thereby eliminating the need for information transmission devices and reducing overhead
2Productivity
If RTT-based positioning method is used, then terminal position can be estimated, but accuracy is insufficient for meter-level precision
Solution Approach 1:
The patent creates a visual copy of the terminal through image capture. The image sensor produces an optical copy (image) of the terminal, from which position information is extracted. This copying approach provides direct visual evidence of terminal location, achieving meter-level or sub-meter-level precision that RTT-based methods cannot achieve
3Reliability
If reconfigurable intelligent surface is controlled with accurate terminal position, then communication performance is improved, but acquiring high-accuracy position information is difficult
Solution Approach 1:
The patent enables the relay device to self-acquire terminal position information using its own integrated image sensor. The system serves itself by capturing images, processing them to extract terminal coordinates, converting to real-world positions, and using this information to control the reconfigurable intelligent surface, all without external positioning infrastructure
Solution Approach 2:
The relay device integrates multiple functions into a single system: the image sensor serves both for monitoring/visualization and for precise position detection; the control device handles both image processing and RIS control. This multi-functionality reduces overall system complexity while ensuring accurate position information is available for communication optimization
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution allows for quick and accurate acquisition of terminal position information, reducing overhead and enabling precise control of the reconfigurable intelligent surface, thereby improving communication performance.
Implementation Method 1
The image sensor captures a use range of the terminal composed of a plurality of regions divided in a lattice shape
Implementation Method 2
The reconfigurable intelligent surface reflects incident radio waves. Reflection characteristics such as a reflection direction of the reconfigurable intelligent surface can be dynamically controlled
Data Source
AI summary
A relay device has the following configuration for quickly and easily acquiring highly accurate terminal position information and controlling the reconfigurable intelligent surface. The reconfigurable intelligent surface dynamically changes the reflection direction of the radio wave. The image sensor captures a use range of a terminal composed of a plurality of regions divided in a lattice shape. A control device controls the reconfigurable intelligent surface. In particular, the control device acquires image data of a use range of the terminal captured by the image sensor. The control device searches for a region where the terminal exists among the plurality of regions from the image data. The control device directs the reflection direction of the reconfigurable intelligent surface to a region where the terminal exists.