Precision Finding with Extended Range Using Dual Radio Technologies
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Solution Overview
Problem
Existing positioning methods for wireless communication systems face challenges in accurately determining the location of mobile devices over extended ranges, particularly in crowded areas where traditional methods may not provide sufficient precision.
Innovation Solution
The method involves transferring positioning signals between a user equipment (UE) and a wireless node using multiple positioning technologies. Initially, a first positioning technology with a limited range is used, followed by a second positioning technology with a greater range to determine the distance between the UE and the wireless node, thereby enabling precision finding with extended range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a first positioning technology with limited range is used, then measurement precision is improved, but the extent of service area deteriorates
Solution Approach 1:
The positioning system is segmented into multiple technologies with different range capabilities. The first positioning technology (e.g., WiFi, Bluetooth) operates in the foreground for high-precision location determination within limited range, while the second positioning technology (e.g., cellular network) operates in the background to extend service area. This segmentation allows the system to achieve both high accuracy and extended coverage by appropriately dividing the positioning task across different technological layers.
2Area of stationary object
If a second positioning technology with greater range is used, then the extent of service area is improved, but measurement precision deteriorates
Solution Approach 1:
The first positioning technology acts as an intermediary that bridges the gap between the second positioning technology's extended range and the requirement for high measurement precision. The second technology (cellular) provides rough location information over extended range, while the first technology (WiFi/Bluetooth) serves as an intermediary to refine this location data and achieve high-precision positioning when the user equipment is within its coverage area.
3Productivity
If multiple positioning technologies are switched progressively, then productivity is improved, but device complexity increases
Solution Approach 1:
The positioning system dynamically switches between different technologies based on real-time conditions such as signal availability, distance, and precision requirements. The system is not static but adapts its composition by activating the first positioning technology when high precision is needed and the second technology when extended range is required, thereby optimizing productivity while managing complexity through conditional activation rather than permanent integration of all components.
Data Source
AI summary
A method for precision finding with two radio technologies includes: determining a first distance to a wireless node based at least in part on a first positioning technology having a capability of determining distances to objects within a first range; determining, based on the first distance being within a second range, a second distance to the wireless node based on a second positioning technology having a capability of determining distances to objects up to the second range, wherein the second range is less than the first range; and outputting location information for the wireless node based at least in part on the second distance.