UWB Multi-Ranging Priority Using RSSI for Digital Keys
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Solution Overview
Problem
In smart key systems, when a vehicle performs multi-ranging using UWB along with multiple digital keys, the priority determination based solely on connection order can lead to exclusion of digital keys with lower priority, reducing user convenience.
Innovation Solution
An apparatus and method that determine UWB multi-ranging priorities for digital keys based on received signal strength indicators (RSSIs) of communication signals, assigning higher priorities to digital keys with stronger signal strength, and incorporating basic connection order priorities when RSSIs are identical.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If priority is determined by connection order, then device complexity is reduced, but user convenience deteriorates due to exclusion of lower priority digital keys
Solution Approach 1:
The patent changes the priority determination parameter from fixed connection order to dynamic RSSI-based signal strength measurement. The processor determines priority by measuring RSSI values of communication signals from multiple digital keys, allowing the system to adapt to real-time spatial relationships and user intentions rather than relying on predetermined connection sequences.
2Productivity
If fixed priority based on connection order is used, then ranging selection is simplified, but digital keys with low priority are frequently excluded, reducing user convenience
Solution Approach 1:
The patent introduces dynamic priority assignment where digital key priorities are not fixed but change based on real-time RSSI measurements. The system continuously evaluates signal strengths and adjusts priority rankings accordingly, enabling lower priority keys to become higher priority when their signal strength increases, thus preventing unnecessary exclusions and improving user convenience.
3Ease of operation
If RSSI-based priority determination is implemented, then user convenience is improved by reducing exclusion of digital keys, but device complexity increases
Solution Approach 1:
The patent replaces the mechanical/connection-order-based priority system with an electromagnetic field-based RSSI measurement system. Instead of relying on the sequence of physical or logical connections, the system uses radio signal strength indicators to dynamically determine priority, substituting a simpler electromagnetic measurement approach for a more complex connection management mechanism.
Data Source
AI summary
An apparatus for determining UWB multi-ranging priorities including a memory configured to store one or more instructions, a first communication system configured to perform a first communication with a plurality of digital keys, and processors configured to execute the one or more instructions to determine a respective UWB multi-ranging priority of a plurality of UWB multi-ranging priorities for each respective digital key of the plurality of digital keys based on received signal strength indicators (RSSIs) of a first plurality of communication signals of the first communication received by the first communication system for each digital key.