UWB Communication Timing for Accurate Distance Measurement
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Solution Overview
Problem
Current UWB communication methods in electronic devices face issues with increased current consumption and reduced accuracy in distance measurement due to uncertain activation times of UWB receivers and time errors in response times, leading to inefficient and imprecise positioning.
Innovation Solution
The method involves calculating a time error based on distance measurement cycles and applying it to response times, allowing for accurate distance measurement by reducing UWB communication time during contention phases and minimizing current consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UWB receiver is activated for a longer time to ensure accurate distance measurement, then measurement precision is improved, but current consumption increases
Solution Approach 1:
The electronic device performs preliminary actions by calculating the time error in advance based on the distance measurement cycle and time difference between poll messages. This pre-calculated time error is then applied to the response time, allowing the device to accurately determine distance without needing to extend the UWB receiver activation period, thus resolving the contradiction between measurement precision and energy consumption
2Duration of action of moving object
If the response time from external electronic device is extended, then complete communication is achieved, but time error increases reducing measurement accuracy
Solution Approach 1:
The system implements feedback by continuously monitoring the time difference between poll messages and using this information to calculate and apply time error corrections to response times. This feedback mechanism allows the system to maintain accurate distance measurements even when response times vary, resolving the contradiction between response time duration and measurement precision
3Adaptability or versatility
If multiple external electronic devices are present, then communication versatility is improved, but current consumption increases due to extended waiting time
Solution Approach 1:
The electronic device performs preliminary calculations of time error based on the distance measurement cycle before engaging in communication with multiple external devices. This pre-computation allows the device to efficiently manage communications with multiple devices without extending receiver activation time, thus maintaining multi-device versatility while minimizing energy consumption
Data Source
AI summary
A method and a device are provided. The device includes at least one communication module, a memory, and at least one processor operatively connected to the at least one communication module and the memory, wherein the at least one processor is configured to broadcast a first poll message including a first distance measurement cycle by using the at least one communication module, broadcast a second poll message including a second distance measurement cycle by using the at least one communication module, receive, from at least one external electronic device, a response message including a time-error applied response time, and determine the distance to the at least one external electronic device based on the time error-applied response time.