PRS Resource Spatial Adjacency for NR Positioning Accuracy
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Solution Overview
Problem
Current downlink angle of departure (DL-AoD) positioning technology in new radio (NR) systems has low positioning accuracy due to the selection of PRS resources with relatively larger RSRP without considering spatial relationships between PRS resources.
Innovation Solution
The method involves determining at least two target PRS resources that are spatially adjacent among multiple PRS resources for each access network device, and sending their measurement results to a location server, allowing the server to utilize main lobe and side lobe information for improved positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the terminal selects a PRS resource with relatively larger RSRP to report, then the feedback process is simple, but the positioning accuracy is low
Solution Approach 1:
The patent segments the PRS resources into multiple groups based on spatial adjacency relationships. Instead of treating all PRS resources equally or selecting only one, the terminal divides them into spatially adjacent groups and selects representative resources from each group for reporting. This segmentation allows the system to maintain operational simplicity while improving positioning accuracy by capturing spatial distribution information.
Solution Approach 2:
The patent introduces a spatial dimension to the PRS resource selection process. By considering spatial adjacency relationships between PRS resources and incorporating this spatial information into the selection criteria, the system moves beyond simple RSRP-based selection to a multi-dimensional selection approach that includes both signal strength and spatial position, thereby improving positioning accuracy.
2Measurement precision
If the terminal reports measurement results of multiple PRS resources, then the positioning accuracy improves, but the feedback complexity increases
Solution Approach 1:
The patent extracts only the essential spatial adjacency information from the complete set of PRS resources. Instead of requiring the terminal to process and report information about all PRS resources uniformly, the system extracts and reports only those PRS resources that represent distinct spatial groups. This extraction approach reduces feedback complexity while preserving the spatial information needed for accurate positioning.
Solution Approach 2:
The patent applies partial action by selecting a subset of PRS resources that are sufficient for accurate positioning without requiring complete information from all resources. By identifying and reporting only the spatially representative PRS resources from each adjacent group, the system achieves adequate positioning accuracy with reduced feedback overhead, avoiding the excessive complexity of reporting all possible PRS resource measurements.
Data Source
AI summary
The present application provides a positioning method and apparatus, and a storage medium, the method includes: a terminal receiving PRSs from multiple access network devices, each access network device corresponding to multiple PRSs; for each access network device, the terminal determining at least two target PRS resources that are spatially adjacent among PRS resources for transmitting the multiple PRSs of the access network device; and the terminal sending measurement results of the target PRS resources to a location server, the measurement result of the target PRS resource being used for instructing the location server to determine location information of the terminal.