Modular Reconfigurable Intelligent Surface for Remote Beam Control
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Solution Overview
Problem
Reconfigurable intelligent surfaces require manual reconfiguration in response to changes in wireless environments, such as user movement or interference, which is inefficient and cannot adapt quickly to evolving communication needs.
Innovation Solution
A remotely controlled reconfigurable intelligent surface with a modular, scalable design, where modules of unit cells can be interconnected and controlled via a primary controller and infrared signals to adjust phase shifts and reconfigure the surface dynamically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If reconfigurable intelligent surfaces require manual reconfiguration when wireless environment changes, then the system maintains simplicity in control architecture, but the system cannot adapt quickly to evolving communication needs and user movement
Solution Approach 1:
The system enables self-service through automatic environment sensing and self-configuring capabilities. Sensors detect changes in wireless environment, user movement, and interference conditions, then the controller automatically reconfigures the intelligent surface without manual intervention, allowing the system to serve itself in adapting to evolving communication needs
Solution Approach 2:
The system implements feedback mechanisms where sensors continuously monitor wireless environment parameters and feed this information back to the controller. The controller processes this feedback and automatically adjusts the intelligent surface configuration in response to detected changes, creating a closed-loop adaptive system that responds dynamically to environmental conditions
2Adaptability or versatility
If a fixed number of unit cells is used in the intelligent surface, then the device structure remains simple, but the system cannot provide flexible signal strength adjustment for different coverage scenarios
Solution Approach 1:
The intelligent surface is divided into multiple independent unit cells that can be individually controlled. Each unit cell acts as a separate element with its own phase shifter and control interface, allowing granular adjustment of signal properties across different regions of the surface to achieve flexible beamforming and coverage optimization
Solution Approach 2:
The system transitions from a static fixed-configuration surface to a dynamic reconfigurable surface where unit cells can be selectively activated or deactivated based on communication requirements. The controller dynamically adjusts the state of individual unit cells to adapt signal strength and coverage area to matching communication scenarios
3Measurement precision
If unit cells are independently controlled with individual phase shifters, then precise beam direction control is achieved, but the control system complexity increases significantly
Solution Approach 1:
The controller is designed as a universal multi-functional device that handles multiple tasks: receiving sensor inputs, processing control signals, calculating optimal beam directions, and generating control commands for all unit cells. This centralized multi-functional approach consolidates control complexity into a single device rather than distributing it across multiple independent controllers
Solution Approach 2:
The controller acts as an intermediary between the sensor array and the unit cells. It receives environmental data from sensors, processes this information to determine desired beam characteristics, and translates these requirements into specific control signals for each unit cell's phase shifter, simplifying the overall control architecture through centralized mediation
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
Enables dynamic adaptation to changes in wireless environments by remotely controlling signal strength and beam direction, improving signal quality, reducing interference, and enhancing coverage in challenging areas.
Implementation Method 1
By controlling the reflection and/or refraction of electromagnetic waves, reconfigurable intelligent surfaces can create more favorable propagation environments
Implementation Method 2
By controlling the reflection and/or refraction of electromagnetic waves, reconfigurable intelligent surfaces can create more favorable propagation environments
Implementation Method 3
Each module may include an infrared receiver that receives an infrared control signal from a transmitter, such as a remote control device
Data Source
AI summary
The technology described herein is directed towards remotely controlling the direction and the signal strength of a beam reflected from a reconfigurable intelligent surface. A modular design of interconnected, communicatively coupled fundamental modules of unit cells facilitates a straightforward assembly process in which the aperture of the reconfigurable intelligent surface can be scaled by tiling together the modules. The reconfigurable intelligent surface aperture can be remotely fine-tuned with respect to gain and beam reflection direction upon receiving a control signal (e.g., a nine-bit digital code through infrared). Depending on a given scenario, the reflected beam be controlled to reflect an electromagnetic wave (e.g., mmWave) as a concentrated, high-gain coverage beam in a specified direction, a more expansive, low-gain coverage area beam in the specified direction, or something in between, e.g., medium signal strength and medium coverage area.