UE Positioning via Sensor-Assisted PRS Resource Allocation
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Solution Overview
Problem
Current wireless communication systems face challenges in accurately positioning user equipment (UE) due to limitations in existing radio access technology (RAT)-dependent and RAT-independent positioning methods, particularly in scenarios with high mobility or indoor environments where GPS and GNSS signals are unreliable.
Innovation Solution
A method and apparatus that combine RAT-dependent and RAT-independent positioning techniques using sensors mounted on the UE, allowing for on-demand resource allocation and retransmission of positioning reference signals (PRS) based on specific conditions such as changes in movement direction or location, enabling more accurate and efficient UE positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If GPS and GNSS signals are used for positioning, then positioning can be provided in outdoor environments, but positioning becomes unreliable in indoor environments or high mobility scenarios
Solution Approach 1:
The patent combines multiple positioning methods (RAT-dependent positioning using PRS signals and RAT-independent positioning using sensor data) into a unified positioning system. The network side determines whether to use RAT-dependent positioning, RAT-independent positioning, or both simultaneously based on UE mobility state and environmental conditions, thereby achieving reliable positioning across diverse environments including indoor and high mobility scenarios where GPS/GNSS alone would fail
Solution Approach 2:
The patent implements dynamic positioning method selection where the network side adaptively switches between different positioning approaches based on real-time conditions. The system determines UE mobility state and selectively applies RAT-dependent positioning for low mobility, RAT-independent positioning for high mobility, or combines both methods, making the positioning system adaptable to changing environmental and mobility conditions
2Measurement precision
If PRS signals are transmitted frequently to improve positioning accuracy, then positioning accuracy improves, but resource overhead increases
Solution Approach 1:
The patent implements dynamic PRS resource allocation where the network side determines PRS transmission based on real-time positioning accuracy requirements and UE mobility state. PRS signals are transmitted selectively rather than continuously - the network side adjusts PRS transmission timing and frequency based on whether RAT-dependent or RAT-independent positioning is being used, thereby achieving required positioning accuracy while minimizing resource overhead
Solution Approach 2:
The patent changes the transmission parameters of PRS signals dynamically based on positioning needs. The network side controls PRS transmission timing, frequency, and resource allocation based on the selected positioning method and current system conditions, optimizing the balance between positioning accuracy and resource consumption by adjusting these parameters rather than using fixed transmission patterns
3Measurement precision
If sensor data is continuously monitored to track UE movement, then positioning accuracy in high mobility scenarios improves, but energy consumption increases
Solution Approach 1:
The patent implements dynamic sensor monitoring where the network side controls when sensor data is collected and transmitted based on UE mobility state. The system monitors physical quantities (acceleration, orientation, position) from UE sensors and selectively triggers data transmission when movement exceeds thresholds or when RAT-independent positioning is required, avoiding continuous monitoring and reducing energy consumption while maintaining positioning accuracy when needed
Data Source
AI summary
Disclosed in various embodiments of the present disclosure are a positioning method in a wireless communication system, and a device supporting same.