UWB DL-TDoA Ranging Round Control for Power-Accurate Positioning
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Solution Overview
Problem
Existing UWB communication systems face challenges in dynamically controlling ranging rounds for DL-TDoA, leading to inefficiencies in power usage and positioning accuracy.
Innovation Solution
A method and device for configuring an active ranging round set, determining the number of received DT messages, and adjusting the active ranging round set based on a predetermined threshold, using a UWB device with a transceiver and processor to optimize power usage and improve positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UWB device continuously monitors all ranging rounds for DL-TDoA, then positioning accuracy is improved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the active ranging round set configurable and adjustable. The system dynamically adapts which ranging rounds to monitor based on positioning requirements, allowing the device to switch between monitoring all rounds (for high accuracy) or only selected rounds (for power saving), thus resolving the contradiction between positioning accuracy and power consumption
Solution Approach 2:
The patent changes the parameter of 'active ranging round set' from a fixed all-inclusive configuration to a flexible selectable configuration. By allowing parameter adjustment in how many and which ranging rounds are monitored, the system can optimize the balance between measurement precision and energy consumption based on actual operational needs
2Use of energy by moving object
If the UWB device reduces the active ranging round set to save power, then power consumption decreases, but positioning reliability deteriorates
Solution Approach 1:
The patent implements feedback mechanisms where the system monitors positioning success rates and message reception statistics from the reduced active ranging round set. Based on this feedback, the system can adjust the active ranging round configuration to ensure sufficient reliability is maintained while achieving power savings, creating a closed-loop optimization system
3Productivity
If the UWB device dynamically adjusts the active ranging round set, then power efficiency is improved, but system complexity increases
Solution Approach 1:
The patent segments the ranging rounds into distinct active and inactive sets, making the complexity manageable through structured organization. By dividing the monitoring task into selective segments rather than monolithic processing, the system achieves power efficiency while keeping the control logic organized and manageable
Data Source
AI summary
The present disclosure provides a method for performing DL-TDoA by a UWB device. A method by a UWB device in a wireless communication system according to an embodiment of the present disclosure may comprise the steps of: establishing an active ranging round set; determining whether a number of ranging blocks that have received at least one DT message through the at least one active ranging round during a preconfigured first period is smaller than a predetermined number of ranging blocks; and when the number of ranging blocks that have received the at least one DT message is equal to or greater than the predetermined number of ranging blocks, determining a first candidate active ranging round set on the basis of the at least one DT message.