PRS Data Management for 5G Positioning Accuracy
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Solution Overview
Problem
Current 5G communication systems face challenges in accurately determining terminal positioning, particularly in IoT networks, where existing methods for positioning reference signals (PRS) are not efficiently managed, leading to suboptimal performance in high-data-rate and low-latency scenarios.
Innovation Solution
The proposed solution involves a method and apparatus for managing PRS data in 5G systems, including receiving and reporting PRS measurements, requesting activation of PRS data, determining PRS data validity, and transmitting time patterns for PRS, which enhances positioning accuracy by optimizing the use of PRS data in both RRC_CONNECTED and RRC_INACTIVE states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If PRS data is continuously transmitted to ensure positioning accuracy, then positioning precision is improved, but network signaling overhead and energy consumption increase
Solution Approach 1:
The patent implements periodic PRS transmission where the network configures PRS resources with specific periodicity and offset parameters. The terminal receives PRS data at periodic intervals rather than continuously, maintaining positioning accuracy while reducing energy consumption and network overhead. The network can dynamically adjust the periodicity based on positioning requirements.
Solution Approach 2:
The patent enables dynamic adaptation of PRS transmission parameters including periodicity, bandwidth, and resource allocation based on terminal mobility state, positioning accuracy requirements, and network conditions. The network can switch between different PRS configurations to optimize the trade-off between positioning precision and resource consumption.
2Measurement precision
If PRS measurement capability is enhanced for high-precision positioning, then positioning precision is improved, but terminal complexity increases
Solution Approach 1:
The patent segments PRS measurement capability reporting into multiple components including time pattern support, frequency pattern support, and measurement quantity types. The terminal reports capability information in a structured, modular format that allows the network to configure appropriate measurement requirements without overwhelming the terminal with complex configurations.
Solution Approach 2:
The patent introduces configurable parameters for PRS measurement including time pattern indicators, frequency pattern indicators, and measurement quantity selections. These parameters allow flexible adjustment of measurement complexity to match terminal capabilities while achieving required positioning precision.
3Adaptability or versatility
If multiple PRS data types are supported for different positioning scenarios, then adaptability is improved, but system complexity increases
Solution Approach 1:
The patent creates a universal PRS measurement framework that supports multiple positioning scenarios through configurable parameters rather than separate dedicated mechanisms. The same PRS measurement capability can be adapted to different time patterns, frequency patterns, and measurement quantities to serve various positioning requirements including indoor positioning, outdoor positioning, and mobile positioning.
Solution Approach 2:
The patent implements preliminary configuration of PRS measurement capabilities where the terminal reports its supported time patterns, frequency patterns, and measurement quantities before actual positioning measurements. This advance capability declaration allows the network to optimize PRS configurations without requiring complex runtime negotiations, reducing system complexity while maintaining versatility.
Data Source
AI summary
A method and apparatus for positioning in a mobile communication system are provided. Method for positioning includes receiving second PRS data via system information, reporting capability related to PRS measurement in RRC_CONNECTED and capability related to PRS measurement in RRC_INACTIVE, transmitting requesting activation of the second PRS data, receiving third PRS data via dedicate message, determining validity of the PRS data, transmitting time pattern for PRS in via dedicate message, receiving first PRS data via dedicate message and reporting the measurement results.