UWB Anchor ON/OFF Ranging Control for Power and Signal Failures

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Solution Overview

Problem

UWB anchors in smart key systems experience unnecessary power consumption and degradation of ranging performance due to continuous failure in signal reception, leading to open reception windows and inefficient power usage.

Innovation Solution

Implement a UWB ON/OFF operation method where UWB anchors enter a standby mode when a maximum number of consecutive ranging failures is reached, and re-enter the standby mode after a predetermined time, minimizing power consumption and maintaining ranging performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If UWB anchor keeps reception window open continuously, then ranging performance can be maintained, but power consumption increases unnecessarily

Engineering Contradiction:

Improveranging performanceVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The UWB anchor operates in periodic ON/OFF cycles, switching between active reception mode and standby mode. The anchor enters standby mode after a maximum number of consecutive ranging failures and returns to active mode after a predetermined time, creating a periodic operation pattern that reduces power consumption while maintaining ranging capability when needed.

Inventive Principle:

Principle #19Periodic action

2Use of energy by moving object

If UWB anchor enters standby mode to reduce power consumption, then power usage decreases, but ranging performance may degrade

Engineering Contradiction:

Improvepower consumptionVSAvoidranging performance

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The system uses feedback from ranging results to control the ON/OFF operation. When consecutive ranging failures occur (indicating the tag is likely absent or out of range), the anchor switches to standby mode. When the predetermined time elapses, the anchor automatically returns to active mode to attempt ranging again, creating a feedback-based adaptive power management system.

Inventive Principle:

Principle #23Feedback

3Reliability

If UWB anchor remains in active mode after consecutive ranging failures, then ranging performance is maintained, but power consumption continues unnecessarily

Engineering Contradiction:

Improveranging performanceVSAvoidunnecessary power consumption

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The UWB anchor autonomously manages its own power consumption by monitoring ranging results and automatically transitioning between active and standby modes based on predetermined conditions. The controller determines when to enter standby mode after maximum consecutive failures and when to return to active mode after the predetermined time elapses, enabling self-service power optimization without external control.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS20250261108A1UWB on/off operation method to minimize degradation of ranging performance and UWB anchor using the same

Publication Date: 2025.08.14 HYUNDAI MOBIS CO LTD

AI summary

A method of operating an ultra-wideband, UWB of a UWB anchor including entering a UWB ranging mode, ranging the UWB anchor based on a first ranging time unit, wherein the first ranging time unit includes second ranging time units, and determining whether or not the ranging is established in specific second ranging time units among the second ranging time units, wherein when the ranging is established in the specific second ranging time units, a remainder of the second ranging time units is unmapped for the ranging.