PRS Resource Configuration for 5G Positioning Accuracy
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Solution Overview
Problem
The accuracy of positioning in 5G mobile communication systems is compromised due to collisions between positioning reference signals (PRS) and synchronization signals/physical broadcast channels (SS/PBCH) in new radio (NR) systems, which affect the precision of location determination.
Innovation Solution
The method involves configuring the time-frequency resources for PRS and SS/PBCH blocks in such a way that when their resources overlap, the terminal device skips receiving the PRS on the overlapped resource, thereby reducing interference and enhancing positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If PRS is mapped to time-frequency resources that overlap with SS/PBCH block resources, then the positioning reference signal can be transmitted, but the positioning accuracy deteriorates due to signal collision and interference
Solution Approach 1:
The patent segments the time-frequency resources by dividing them into distinct regions: some resources are allocated for PRS transmission while other resources are allocated for SS/PBCH block transmission. This segmentation prevents overlap between positioning signals and synchronization/broadcast signals, eliminating interference and ensuring accurate positioning measurements can be performed without degradation from signal collisions
Solution Approach 2:
The patent applies local quality by assigning different resource allocation characteristics to different signal types. Specifically, PRS resources are configured with parameters (such as frequency offsets, subcarrier spacing, or time slot assignments) that are locally optimized to avoid SS/PBCH block resources, while SS/PBCH blocks maintain their own resource patterns. This localized resource differentiation ensures that each signal type operates in its own optimized resource domain without interference
2Productivity
If PRS and SS/PBCH block share the same time-frequency resources, then resource utilization is improved, but positioning measurement precision deteriorates due to signal collision
Solution Approach 1:
The patent segments the available time-frequency resource pool into distinct allocation zones for PRS and SS/PBCH blocks. By configuring PRS with specific resource parameters (such as starting resource blocks, frequency offsets, or time domain positions) that differ from SS/PBCH block allocations, the system creates non-overlapping resource segments. This segmentation maintains high overall resource utilization while ensuring that positioning measurements can be performed without interference from synchronization or broadcast signals
Data Source
AI summary
An information configuration method and apparatus, the method including receiving first configuration information, where the first configuration information includes configuration information of a time-frequency resource to which a positioning reference signal (PRS) is mapped and configuration information of a time-frequency resource to which a synchronization signal/physical broadcast channel (SS/PBCH) block is mapped, determining, based on the first configuration information, the time-frequency resource to which the PRS is mapped and the time-frequency resource to which the SS/PBCH block is mapped, and skipping receiving, when the time-frequency resource to which the SS/PBCH block is mapped overlaps the time-frequency resource to which the PRS is mapped, the PRS on the overlapped time-frequency resource.