UWB Vehicle Ranging Priority Control for Conflict-Free Access
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Solution Overview
Problem
Existing vehicle access systems using UWB ToF for distance determination face challenges with resource conflicts and high failure rates of ranging results, leading to delayed responses and unwanted system behaviors.
Innovation Solution
A prioritization instance is implemented to assign priority codes to vehicle transceivers based on situational criteria, such as recently determined distances and ownership, to manage message prioritization and avoid resource conflicts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple UWB communications run simultaneously, then system functionality is improved, but resource conflicts occur and message failure rate increases
Solution Approach 1:
The system performs preliminary actions by predicting future message arrivals and resource conflicts before they occur. The prediction unit forecasts when resource conflicts will happen based on current ranging session parameters, allowing the system to proactively adjust message scheduling and prioritize critical communications before failures occur.
Solution Approach 2:
The system dynamically adjusts message prioritization and scheduling based on real-time conditions. The prediction unit continuously monitors ranging session parameters and updates predictions, allowing the system to adapt message handling strategies dynamically rather than using static prioritization rules.
2Reliability
If the vehicle transceiver switches between UWB ranging sessions to avoid conflicts, then resource conflicts are reduced, but response time increases and latency occurs
Solution Approach 1:
The system predicts resource conflicts in advance and prepares prioritization strategies before conflicts occur. By forecasting when conflicts will happen based on current session parameters, the system can pre-arrange message scheduling to minimize switching delays and maintain faster response times.
Solution Approach 2:
The system applies different prioritization levels to different messages based on their specific importance and timing requirements. Critical messages receive higher priority handling while less critical communications can be deferred, allowing the system to optimize response time for important functions without completely avoiding session switching.
3Reliability
If prioritization based on situational criteria is implemented, then message failure rate is reduced, but system complexity increases
Solution Approach 1:
The system uses feedback from the prediction unit about anticipated resource conflicts to dynamically adjust message prioritization. The prediction outcomes feed back into the message scheduling mechanism, creating a closed-loop system that automatically adapts prioritization based on predicted conditions rather than requiring complex manual configuration.
Solution Approach 2:
The system performs self-service by automatically predicting resource conflicts and adjusting message prioritization without external intervention. The prediction unit and prioritization mechanism work autonomously based on current ranging session parameters, reducing the need for complex external control systems.
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
The solution effectively reduces message failure rates and improves response times by ensuring that critical messages are prioritized, thereby enhancing the reliability and efficiency of vehicle access systems.
Implementation Method 1
determining in each case a distance value, representing a distance between a vehicle transceiver of a vehicle and one of a plurality of mobile device transceivers, by interchanging messages
Data Source
AI summary
Disclosed is an apparatus for determining at least one distance value, representing a distance between a vehicle transceiver of a vehicle and one of a plurality of mobile device transceivers, by interchanging messages, wherein at least one vehicle transceiver is configured, to prioritize, according to predefined priorities, one or more messages from a first mobile device transceiver over one or more messages from at least one other mobile device transceiver.