Bluetooth 5.1 Positioning System Using AoA Antenna Arrays
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Solution Overview
Problem
Existing short-range wireless communication technologies, such as Bluetooth 5.1, face challenges in accurately detecting the position and orientation of devices, leading to inaccuracies in relative positional relationships, especially when devices are at a distance from each other.
Innovation Solution
A system comprising multiple units with short-range wireless communication functions, processors, and memories that utilize Bluetooth 5.1 to measure position information and generate a layout chart by specifying the positional relationship between units, employing Angle of Arrival (AoA) or Angle of Departure (AoD) methods to determine distance and direction, and using multiple antennas for improved accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If Bluetooth 5.1 with AoA/AoD is used for position detection, then directional detection capability is improved, but measurement precision deteriorates when devices are at a distance from each other
Solution Approach 1:
The patent combines multiple short-range wireless communication devices to form a collaborative measurement system. Multiple devices work together to mutually measure and calculate positional relationships, thereby improving measurement precision when devices are at a distance from each other while maintaining directional detection capability
Solution Approach 2:
The system implements a feedback mechanism where measurement results from multiple devices are continuously exchanged and used to calculate and update the positional relationships. This feedback loop allows the system to refine position accuracy by aggregating data from multiple measurement points
2Measurement precision
If multiple units are used to improve position detection accuracy, then measurement precision is improved, but device complexity increases
Solution Approach 1:
Each unit in the system is designed to perform multiple functions: it can both transmit and receive wireless signals, act as either a measurement initiator or target, and participate in mutual position calculations. This multi-functionality allows accurate position detection using multiple units without proportionally increasing system complexity
Solution Approach 2:
The system divides the position detection task into independent measurement segments between pairs of units. Each unit independently performs measurements and calculations, then shares results with the central controller that aggregates data to determine overall positional relationships, thereby managing complexity through task segmentation
3Ease of operation
If automatic layout chart generation is implemented, then ease of operation is improved, but loss of time in data processing increases
Solution Approach 1:
The system performs preliminary actions by automatically generating the layout chart as soon as position measurements are complete, without requiring manual intervention for chart creation. This preliminary automatic generation reduces the time users need to spend on configuration tasks while maintaining ease of operation
Solution Approach 2:
The system provides self-service by automatically processing measurement data and generating layout charts without user intervention. The processors in multiple units collaboratively calculate positional relationships and produce the layout chart autonomously, reducing both user effort and overall processing time through parallel computation
Data Source
AI summary
A system includes a plurality of units each having a short-range wireless communication function capable of measuring position information relative to each other. A specification part specifies a positional relationship between the plurality of units, using information obtained by using the short-range wireless communication functions, a determination part uses the information obtained by using the short-range wireless communication functions to determine orientation information indicating orientation of a predetermined unit included in the plurality of units, and a generation part generates a layout chart of the plurality of units, based on the positional relationship between the plurality of units specified by the specification part and based on the orientation information. A display displays the layout chart, wherein information for enabling identification of a side of the predetermined unit that is to be operated by a user is indicated for an item of the predetermined unit included in the layout chart.