Multi-Antenna Positioning for Terminal Orientation and Posture
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Solution Overview
Problem
Existing positioning methods in industrial IoT scenarios, such as 5G and next-generation mobile communication systems, fail to accurately determine the positioning information, including location, orientation, and posture of terminal devices due to the large approximation errors caused by treating multiple antennas as a single mass point, especially when precision requirements exceed 0.2 meters.
Innovation Solution
A method and apparatus that utilize a positioning management device to receive and process antenna identifiers and measurement information from terminal devices, enabling precise determination of absolute coordinates, orientation, and posture by considering each antenna's unique location and measurement results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If all antennas of the terminal device are considered as one mass point for positioning, then the positioning method is simple and device complexity is reduced, but the positioning precision deteriorates and approximation error becomes large
Solution Approach 1:
The patent divides the terminal device into multiple independent antenna units, each with its own identifier and location coordinates. Instead of treating all antennas as a single mass point, the system processes measurement information from each antenna separately and uses the known relative positions between antennas to calculate the terminal device's location, orientation, and posture, thereby improving positioning precision while maintaining manageable system complexity
Solution Approach 2:
The patent transitions from two-dimensional positioning (only location coordinates) to three-dimensional positioning that includes location, orientation, and posture information. By utilizing the spatial distribution of multiple antennas and their measurement data, the system determines not only the terminal's position but also its orientation angles and posture, adding dimensional information to the positioning result
2Ease of manufacture
If all antennas of the terminal device are considered as one mass point, then the deployment condition is simple, but the positioning error exceeds the required precision of 0.2 meters
Solution Approach 1:
The patent performs preliminary configuration by pre-storing the location coordinates of each antenna relative to the terminal device body. Before positioning measurement, the system already has the spatial relationship between antennas established, so during actual positioning, it only needs to process measurement data from each antenna and combine it with the pre-known relative positions to achieve high-precision positioning without complex real-time calculations
Solution Approach 2:
The patent introduces the antenna's local coordinates and relative position relationships as intermediary parameters. The positioning management device uses these intermediary coordinate systems to transform measurement data from different antenna reference frames into a unified terminal device coordinate system, enabling accurate determination of the terminal's position and orientation while maintaining simple deployment conditions
3Device complexity
If all antennas are treated as one mass point, then the information processing is simple, but orientation and posture information cannot be determined
Solution Approach 1:
The patent implements a feedback mechanism where the positioning management device receives measurement information from each antenna, processes it along with the pre-stored antenna location coordinates, and uses the spatial distribution pattern of the antennas to infer the terminal device's orientation and posture. The system continuously refines the positioning result by iteratively processing measurement data from multiple antennas, enabling determination of orientation angles and posture information that would be lost in single-mass-point approaches
Data Source
AI summary
A positioning management device receives first information sent by a terminal device, where the first information includes a plurality of antenna identifiers of the terminal device and local antenna coordinates corresponding to each antenna identifier. The positioning management device receives measurement information sent by the terminal device, where the measurement information includes the plurality of antenna identifiers of the terminal device and a measurement result that is of a downlink reference signal and that corresponds to each antenna identifier. The positioning management device determines positioning information of the terminal device based on the first information and the measurement information, where the positioning information includes one or more of the following information: absolute coordinates of the terminal device, orientation or posture information of the terminal device, a rotation angle of the terminal device, or uptilt and downtilt angles of the terminal device.