Fine-Time Indoor Positioning With Strobe-Synchronized Sensors
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Solution Overview
Problem
Existing wireless communication systems, particularly in 5G and Wi-Fi networks, face challenges in accurately determining the time of arrival and departure of packets for precise indoor positioning, which is crucial for enhancing location services.
Innovation Solution
The implementation of a method that involves activating a strobe signal at the time of arrival or departure of packets to store sensor data from accelerometers, gyroscopes, or magnetometers, allowing for precise timing measurements and improved indoor positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If wireless communication systems use conventional timing measurement methods, then the system complexity is low, but the positioning precision is insufficient
Solution Approach 1:
The system performs preliminary actions by capturing sensor data (accelerometer, gyroscope, magnetometer) at the exact moment of packet transmission and reception before positioning calculations are performed. This pre-capture of temporal and spatial context enables highly accurate positioning by ensuring sensor data is synchronized with timing measurements, resolving the contradiction between maintaining simple systems and achieving high precision.
2Measurement precision
If sensor data is captured continuously for positioning, then the positioning accuracy is improved, but the energy consumption increases
Solution Approach 1:
Instead of continuous sensor data capture, the system employs periodic action by activating sensors only at specific intervals when packets are transmitted or received. The strobe signal triggers sensor data capture precisely at these periodic moments, ensuring positioning accuracy is maintained while dramatically reducing energy consumption compared to continuous monitoring.
3Measurement precision
If the system uses multiple sensors for timing measurements, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
The system merges multiple sensor types (accelerometer, gyroscope, magnetometer) into a unified positioning framework triggered by a single strobe signal. By combining these sensors and synchronizing them with packet timing events, the system achieves high timing measurement precision while managing device complexity through integrated control rather than separate independent systems.
Data Source
AI summary
Disclosed are techniques for wireless communication. In an aspect, a first station (STA) may receive a first packet from a second STA at a first time-of-arrival of the first packet. The first STA may activate a strobe signal to store first sensor data at the first time-of-arrival, wherein the first sensor data corresponds to a sensor output of one or more sensors of the first STA at the first time-of-arrival, wherein the one or more sensors include an accelerometer, a gyroscope, a magnetometer, or any combination thereof.