UWB Beacon Ranging for Seamless Indoor Positioning
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Solution Overview
Problem
Existing indoor positioning systems face challenges in providing precise location information due to GPS signal limitations in enclosed spaces, necessitating improved systems that are scalable, power-efficient, and integrate with existing smartphone capabilities.
Innovation Solution
Utilizing ultra-wideband (UWB) technology with strategically placed beacons and mobile devices for precise location determination through UWB ranging and trilateration, leveraging out-of-band communication channels like Bluetooth Low Energy for efficient data exchange and seamless transitions between GPS and UWB positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS technology is used for positioning, then outdoor location accuracy is achieved, but indoor positioning fails due to signal limitations
Solution Approach 1:
The patent introduces ultrawideband beacons as intermediary devices that mediate between the mobile device and the positioning system. These beacons are strategically placed throughout the indoor environment and communicate with mobile devices via ultrawideband signals, enabling accurate indoor positioning where GPS fails. The beacons act as local reference points that allow the mobile device to calculate its position through two-way ranging, thus resolving the contradiction between outdoor GPS accuracy and indoor positioning availability.
2Productivity
If ultrawideband ranging is performed continuously, then real-time location updates are achieved, but power consumption increases
Solution Approach 1:
The patent implements periodic ultrawideband ranging sessions between mobile devices and beacons rather than continuous operation. The system performs two-way ranging at scheduled intervals, allowing the mobile device to maintain real-time location tracking capability while significantly reducing power consumption compared to continuous monitoring. This periodic action enables the system to achieve real-time location updates with improved energy efficiency.
3Measurement precision
If multiple beacons are deployed for accurate positioning, then positioning accuracy improves, but system complexity increases
Solution Approach 1:
The patent divides the indoor positioning system into independent, modular beacon units distributed throughout the environment. Each beacon operates autonomously, performing two-way ranging with mobile devices and reporting measurements to a central system. This segmentation allows the system to scale by simply adding more beacon units without increasing overall system complexity, as each unit functions independently with standardized protocols. The modular architecture enables accurate positioning through multiple beacons while maintaining system scalability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Achieves centimeter-level accuracy in indoor positioning, reduces power consumption, and enables real-time location updates, overcoming inefficiencies in existing methods.
Implementation Method 1
use the ultrawideband component to perform two-way ranging with the ultrawideband beacon and obtain a distance measurement
Data Source
AI summary
An indoor positioning system includes mobile devices and ultrawideband beacons that communicate over out-of-band channels. The mobile devices may retrieve beacon data from advertising channels or servers using Bluetooth Low Energy or REST APIs. The mobile devices generate and advertise device data for ultrawideband two-way ranging sessions. The beacons and mobile devices perform ultrawideband ranging to obtain distance measurements. The mobile devices calculate their positions using the distance measurements. The system may transition between GPS and ultrawideband positioning based on geofencing or accuracy comparisons. Load balancing may manage ranging sessions between multiple beacons and devices. The out-of-band communication enables efficient configuration exchange and seamless indoor/outdoor positioning.