UWB Multi-Ranging Priority Scheduling for Smart Key Reliability
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Solution Overview
Problem
In ultra-wide band (UWB) multi-ranging systems, existing technologies face challenges in ensuring reliable ranging operations for smart keys due to overlapping timing with digital keys, leading to potential failures in ranging operations for terminals with high importance.
Innovation Solution
The electronic device employs a processor to set priorities for terminals, ensuring that the smart key receives the highest priority and digital keys are assigned lower priorities based on their connection order, with the ability to reset and initialize priorities to prevent consistent omission of ranging operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If ranging operations are performed for multiple terminals simultaneously, then the system can support multiple digital keys and smart keys, but ranging operations for high-importance terminals (smart keys) may fail due to timing overlaps with lower-priority terminals (digital keys)
Solution Approach 1:
The patent changes the parameter of ranging timing by introducing priority-based scheduling. The processor assigns different priorities to smart keys and digital keys, and adjusts the ranging timing parameters accordingly to ensure smart keys are ranged before digital keys when timing overlaps occur, thereby resolving the conflict between multi-ranging capability and ranging reliability
Solution Approach 2:
The patent introduces an intermediary mechanism (priority assignment and timing adjustment logic) between the multi-ranging function and the ranging operations. This intermediary manages the timing conflicts by mediating which terminal performs ranging first based on predefined priorities, ensuring smart keys maintain reliable ranging while supporting multiple terminals
2Reliability
If ranging timing is optimized for smart keys, then smart key ranging reliability is ensured, but digital key ranging operations may be consistently omitted or delayed
Solution Approach 1:
The patent applies dynamics by making the ranging timing flexible rather than fixed. The processor dynamically adjusts ranging timing based on terminal priorities and current system state. When smart key ranging is needed, timing is adjusted to accommodate it; when digital key ranging is needed and no smart key conflict exists, digital key ranging proceeds normally, thus maintaining both reliability and productivity
3Device complexity
If fixed ranging timing is used for all terminals, then system complexity is reduced, but timing overlaps cause ranging failures for high-priority terminals
Solution Approach 1:
The patent changes the ranging timing parameter from a fixed value to a dynamically adjustable parameter based on terminal priority. The processor monitors which terminals are present and adjusts ranging timing parameters in real-time to prevent overlaps for high-priority smart keys while maintaining simple control logic through predefined priority rules
Data Source
AI summary
Disclosed is an electronic device for performing ultra wide band (UWB) multi-ranging. The electronic device includes a communication system that performs UWB communication with multiple terminals and a processor. The multiple terminals include a smart key and at least one digital key. The smart key is a device that is ranged on a one off basis in response to a user input and the at least one digital key includes at least one device that is periodically ranged. The processor set priorities of the plurality of terminals, select one of the plurality of terminals between which pieces of ranging timing overlap based on the priorities of the plurality of terminals when the pieces of ranging timing of the plurality of terminals overlap, and perform ranging on the selected terminal through the communication system.