Single-Base-Station AOA Positioning With Reflector Triangulation
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Solution Overview
Problem
Existing positioning techniques in radio access technologies require multiple base stations and tight synchronization, and are prone to noise and interference, limiting their accuracy and applicability, especially in indoor scenarios and high-frequency environments.
Innovation Solution
A method using a single base station with an antenna array featuring a main lobe, back lobe, and side lobes, along with a reflector to redirect energy, allowing for accurate positioning of terminal devices through triangulation based on angles of arrival from line of sight and reflected paths, without the need for synchronization or device feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple base stations are used for positioning (TOA, TDOA techniques), then positioning accuracy is improved, but system complexity and synchronization requirements increase
Solution Approach 1:
The patent segments the positioning function into two parts: (1) multiple base stations perform independent AOA measurements to determine angles of arrival, and (2) a location management node performs triangulation to calculate the final position. This segmentation allows each base station to operate independently with simpler hardware while achieving accurate positioning through coordinated measurement and centralized calculation.
Solution Approach 2:
The patent introduces a location management node as an intermediary that receives AOA measurements from multiple base stations and performs triangulation to determine the terminal's position. This intermediary handles the complex calculation and coordination, allowing individual base stations to maintain simpler architectures while still achieving accurate multi-station positioning.
2Measurement precision
If tight relative time synchronization is implemented for TOA and TDOA techniques, then positioning accuracy is improved, but system complexity and cost increase
Solution Approach 1:
The patent replaces the mechanical/time-based synchronization system (requiring precise clock synchronization between base stations) with an angular measurement system. By using AOA techniques that measure the direction of signal arrival rather than timing, the system eliminates the need for tight time synchronization infrastructure while maintaining positioning accuracy through geometric triangulation.
3Measurement precision
If AOA technique with multiple base stations is used, then positioning accuracy is improved, but the system becomes less adaptable to indoor and high-frequency scenarios
Solution Approach 1:
The patent enhances the universality of the AOA technique by demonstrating its applicability across multiple scenarios including indoor environments and high-frequency communications. The method uses standard AOA measurements combined with triangulation, making it universally applicable to different deployment scenarios without requiring scenario-specific modifications, thus improving adaptability while maintaining accuracy.
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 enables independent positioning of terminal devices with high accuracy, improved performance in high-frequency environments, and reduced complexity, particularly suitable for indoor applications and scenarios where traditional methods are challenging.
Implementation Method 1
a reflector configured to reflect a part of energy of the back lobe to an area of at least one of the one or more side lobes
Data Source
AI summary
Embodiments of the present disclosure provide method and apparatus for positioning. The method may comprise receiving a first radio signal of a terminal device located in the area from a line of sight (LOS) path between the antenna array and the terminal device; receiving a second radio signal of the terminal device located in the area from at least one path reflected by the reflector; determining respective angles of arrival of the LOS path and the at least one path reflected by the reflector; and determining a location of the terminal device by using triangulation based on the respective angles of arrival.