RIS Beam Sweeping for Precise 5G Radar Sensing
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Solution Overview
Problem
Existing wireless communication systems, particularly in the context of 5G, face challenges in accurately positioning devices due to limitations in beamforming and signal reflection, which affect the efficiency and accuracy of sensing operations.
Innovation Solution
The implementation of a reconfigurable intelligence surface (RIS) that adjusts its beamforming properties based on received messages, enabling precise control of sensing operations by configuring itself according to specified angles and modes, thereby enhancing the accuracy of signal reflection and interaction with target objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional beamforming methods are used for sensing operations, then device positioning can be performed, but the accuracy and efficiency of sensing operations are limited
Solution Approach 1:
The patent introduces a reconfigurable intelligent surface (RIS) as an intermediary component between the sensing signal source and target objects. The RIS actively configures its beamforming properties based on received messages indicating sensing modes and angles, thereby mediating the sensing operation to achieve both high accuracy and efficiency. The RIS reflects and directs signals with precise control, enabling accurate positioning while maintaining operational efficiency through its reconfigurable nature.
Solution Approach 2:
The patent implements dynamic beamforming by allowing the RIS to change its configuration in real-time based on received sensing parameters. The RIS adjusts its beamforming properties dynamically according to the sensing beam sweeping mode, incident angle, and redirected angle, enabling adaptive optimization of sensing operations for different scenarios and target positions.
2Measurement precision
If reconfigurable intelligent surface (RIS) is implemented with dynamic beamforming configuration, then sensing accuracy is improved, but system complexity increases
Solution Approach 1:
The RIS performs self-configuration by autonomously adjusting its beamforming properties based on received sensing parameters. The system receives messages indicating the sensing beam sweeping mode, incident angle, and redirected angle, then automatically configures itself without requiring complex external control mechanisms, thereby reducing overall system complexity while maintaining high sensing accuracy.
Solution Approach 2:
The patent utilizes parameter changes in the RIS configuration to achieve dynamic beamforming. By modifying key parameters such as beamforming properties, reflection angles, and sweeping modes based on received messages, the system achieves high sensing accuracy through controlled parameter adjustments rather than complex structural changes.
3Manufacturing precision
If RIS configures itself based on multiple parameters (sensing mode, incident angle, redirected angle), then beam control precision is enhanced, but control complexity increases
Solution Approach 1:
The system performs preliminary configuration by receiving all necessary sensing parameters (sensing beam sweeping mode, incident angle, redirected angle) before executing the sensing operation. The RIS pre-configures its beamforming properties based on these advance notifications, ensuring precise beam control while simplifying the actual sensing execution phase.
Solution Approach 2:
The system implements feedback mechanisms where the RIS receives configuration messages indicating the desired sensing parameters and adjusts its beamforming accordingly. This feedback loop enables precise beam control by continuously aligning the RIS configuration with the required sensing parameters, achieving high precision without requiring overly complex control architecture.
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
This approach improves the accuracy and efficiency of wireless communication systems by allowing for precise beam control and enhanced sensing capabilities, particularly in 5G networks, by utilizing RIS to manage signal reflections effectively.
Implementation Method 1
a returning signal for the sensing operation, the returning signal corresponding to a reflection resulting from an interaction between a sensing signal and a target object
Implementation Method 2
The implementation of a reconfigurable intelligence surface (RIS) that adjusts its beamforming properties based on received messages, enabling precise control of sensing operations
Data Source
AI summary
In an aspect, a wireless node may transmit one or more messages to a reconfigurable intelligence surface (RIS), the one or more messages indicating a sensing beam sweeping mode for a sensing operation, an incident angle of a forward path of the sensing operation with respect to the RIS, a redirected angle of the forward path of the sensing operation with respect to the RIS, or any combination thereof. The wireless node may transmit a sensing signal for the sensing operation to the RIS, the RIS being configured based on the sensing beam sweeping mode, the incident angle of the forward path, the redirected angle of the forward path, or any combination thereof.