Dynamic UWB-BTLE Localization for Accurate Proximity Tracking
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Solution Overview
Problem
Conventional real-time location systems (RTLS) face challenges in accurately determining the location of portable devices relative to objects, such as vehicles, especially in varying environments, due to limitations in signal strength and update rates, and require efficient mode transition criteria for optimal performance.
Innovation Solution
A system and method that operate in two modes, using a dynamic mode transition criterion to switch between methodologies like Ultra-Wide Band (UWB) and Bluetooth Low Energy (BTLE) communications, where UWB provides accurate location information for closer proximity and BTLE is used for farther distances, with calibration to adapt the mode transition criterion based on signal strength and distance thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single location determination methodology is used, then the system is simple to operate, but location determination accuracy varies in different environments
Solution Approach 1:
The system dynamically switches between UWB and BTLE location determination methodologies based on real-time signal strength conditions. A controller monitors RSSI values and transitions between modes (UWB-only, BTLE-only, or combined) to optimize location accuracy for current environmental conditions, making the system adaptive rather than static
Solution Approach 2:
The system changes operational parameters by switching between different communication protocols (UWB vs. BTLE) and different location determination methodologies based on signal strength thresholds. This allows the system to select the most appropriate measurement approach for current conditions
2Measurement precision
If UWB communication is used for location determination, then location accuracy is improved, but power consumption increases
Solution Approach 1:
The system dynamically adjusts its operational mode based on signal conditions. When BTLE signal strength is sufficient, the system operates in lower-power modes using only BTLE. When signal conditions deteriorate below thresholds, it transitions to UWB or combined modes to maintain accuracy, optimizing power usage based on actual needs
Solution Approach 2:
The system changes its operational parameters by switching between different communication protocols and power states. The controller monitors RSSI and adjusts power consumption by selecting appropriate modes (UWB-only, BTLE-only, or combined), balancing accuracy requirements with power conservation
3Reliability
If signal strength threshold is fixed, then the system is easy to implement, but location determination reliability decreases in varying environments
Solution Approach 1:
The system employs dynamic threshold adjustment where the controller monitors RSSI over time and adapts transition thresholds based on observed signal patterns. This allows the system to maintain reliable location determination across varying environmental conditions by adjusting criteria rather than using fixed thresholds
Solution Approach 2:
The system implements feedback mechanisms where the controller continuously monitors signal strength and uses this information to adjust operational modes and transition criteria. This feedback loop enables the system to adapt to changing environmental conditions and maintain reliability
4Adaptability or versatility
If mode transition criterion is dynamic and variable, then location determination adaptability is improved, but system complexity increases
Solution Approach 1:
The system uses dynamic mode transition criteria where the controller adjusts operational modes based on real-time RSSI monitoring. The system can transition between UWB-only mode, BTLE-only mode, or combined modes depending on signal conditions, providing adaptability to various environmental scenarios
Solution Approach 2:
The system changes operational parameters by adjusting which communication protocol is active based on signal strength thresholds. The controller modifies operational modes (UWB/BTLE/combined) and transition criteria to adapt to different environmental conditions while managing system complexity
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 enhances location determination accuracy and efficiency by leveraging the strengths of both UWB and BTLE, allowing for precise tracking and authorization decisions, while optimizing power consumption and update rates.
Implementation Method 1
a plurality of antennas, each of the plurality of antennas configured to receive wireless communications and provide one or more antenna outputs corresponding to wireless communications
Data Source
AI summary
A system and method are provided for determining a location of a portable device relative to an object. The system and method may include operating in two modes: 1) a first mode in which an antenna output, such as a received signal strength indicator, satisfies a mode transition criterion that is dynamic, and 2) a second mode in which, with the mode transition criterion being satisfied, the location of the portable device is determined.