Vehicle UWB Scheduling for Overlapping Key Fob Localization
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Solution Overview
Problem
Existing UWB systems in vehicles cancel overlapping UWB location schedules to prevent interference, reducing the number of localizations and compromising localization accuracy and sensitivity for handheld devices.
Innovation Solution
A method to shift overlapping UWB locations for the key fob while preserving other locations, using a vehicle UWB system to detect overlaps and reprogram the key fob's UWB locations to free slots, ensuring accurate and sensitive localization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If overlapping UWB locations are canceled to prevent interference, then interference between UWB exchanges is reduced, but the number of localizations decreases and localization accuracy deteriorates
Solution Approach 1:
The patent applies dynamics by making the UWB location schedule flexible and adjustable rather than fixed. The system dynamically shifts the timing of UWB locations for the key fob to non-overlapping time slots, allowing the schedule to adapt to avoid conflicts while maintaining all necessary localizations. This dynamic adjustment resolves the contradiction by enabling both interference prevention and localization accuracy preservation through real-time scheduling optimization.
Solution Approach 2:
The patent changes the temporal parameter of UWB location scheduling by shifting the time slots of key fob locations. Instead of canceling overlapping locations, the system modifies the timing parameter to redistribute locations in non-overlapping time windows. This parameter change allows the system to maintain all localizations while preventing interference, thereby resolving the contradiction between interference prevention and localization accuracy.
2Reliability
If overlapping UWB locations are canceled to prevent interference, then UWB exchange reliability is improved, but the frequency of localization updates decreases and sensitivity deteriorates
Solution Approach 1:
The system dynamically adjusts the scheduling of UWB locations to prevent overlaps while maintaining all necessary measurement events. By making the schedule flexible and shifting timings rather than canceling events, the system preserves the frequency of localization updates, thereby maintaining sensitivity while ensuring UWB exchange reliability through conflict-free timing.
Solution Approach 2:
The patent modifies the temporal parameters of UWB location scheduling by shifting time slots to eliminate overlaps. This parameter adjustment maintains the total number of localization events, preserving update frequency and sensitivity, while simultaneously improving UWB exchange reliability by preventing interference between simultaneous transmissions.
3Device complexity
If the number of UWB locations is reduced due to cancellations, then system complexity is decreased, but localization accuracy and sensitivity worsen
Solution Approach 1:
The patent implements a dynamic scheduling approach that automatically adjusts UWB location timings to eliminate overlaps. While this adds some scheduling complexity, it preserves all necessary localization events, thereby maintaining high localization accuracy. The dynamic nature of the system allows it to adapt to different scenarios and maintain optimal performance.
Solution Approach 2:
The system changes the temporal parameters of UWB locations by shifting time slots to non-overlapping positions. This parameter modification maintains the full set of localization events without reduction, preserving measurement precision and sensitivity. The automated parameter adjustment handles the scheduling complexity efficiently, resolving the contradiction between system complexity and localization accuracy.
Data Source
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AI summary
A planning method implemented by a vehicle UWB system (hereafter referred to as the planning method) is proposed. The UWB system includes one or more UWB sensors. The UWB system has stored a plurality of wearable identifiers. The plurality of wearable identifiers includes a remote key fob. The method includes a reception S10, for each wearable identifier, of a respective programming of UWB locations with the vehicle UWB system. The method includes a detection 520 of an overlap between at least two programmed UWB locations. The at least two overlapping UWB locations include a UWB location with the key fob. The method includes an offset 530, in the respective programming of the key fob, of the overlapping UWB location. The method provides improved utilization of the vehicle UWB system.