5G PRS Frequency Offset Positioning with Network-Assisted Measurements
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Solution Overview
Problem
Existing wireless positioning technologies in 5G networks face challenges in achieving highly accurate location determination due to complexities in measuring and utilizing frequency offset measurements of positioning reference signals (PRS) between transmission-reception points (TRPs).
Innovation Solution
A method and apparatus for wireless positioning that involves receiving assistance data for a positioning procedure, measuring frequency offset of PRS resources, and determining the location of a user equipment (UE) based on these measurements, facilitated by network entities and UE components that transmit, receive, and process such data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If frequency offset measurements of PRS resources are used for positioning, then positioning accuracy is improved, but measurement and processing complexity increases
Solution Approach 1:
The location server pre-calculates and provides assistance data containing expected frequency offset values and measurement configurations to the UE before the actual positioning measurement. This preliminary preparation simplifies the UE's measurement process by providing reference values and measurement parameters in advance, reducing real-time processing complexity while maintaining high positioning accuracy through frequency offset measurements
2Measurement precision
If frequency offset measurements are implemented for positioning, then positioning precision is enhanced, but system complexity increases
Solution Approach 1:
The location server acts as an intermediary that centralizes the complex tasks of frequency offset calculation, measurement configuration generation, and positioning result computation. The server receives raw frequency offset measurements from the UE, processes them along with assistance data, and generates the final positioning result. This intermediary approach enhances positioning precision through sophisticated processing while managing system complexity by centralizing computational tasks in the network infrastructure rather than distributing them to UEs
Data Source
AI summary
Disclosed are techniques for wireless positioning. In an aspect, a user equipment (UE) receives, from a location server, assistance data for a positioning procedure, obtains a frequency offset measurement of one or more positioning reference signal (PRS) resources transmitted by at least one transmission-reception point (TRP) based on the assistance data, and enables a location of the UE to be determined based, at least in part, on the frequency offset measurement.