WTRU Phase-Based Positioning LOS Filtering
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing carrier phase-based positioning methods face challenges in efficiently determining line-of-sight (LOS) conditions for phase measurements, leading to suboptimal resource utilization and positioning accuracy.
Innovation Solution
A method implemented in a wireless transmit/receive unit (WTRU) that receives configuration information for phase measurements, determines LOS conditions for specific resources, and transmits reporting information for phase measurements satisfying the LOS conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If phase measurements are performed on all configured resources, then measurement coverage is maximized, but positioning accuracy deteriorates due to inclusion of non-LOS measurements
Solution Approach 1:
The WTRU performs preliminary LOS determination for each configured resource before executing phase measurements. This preliminary action filters out resources that cannot provide accurate LOS measurements, ensuring that only suitable resources are used for positioning calculations, thereby improving positioning accuracy while avoiding waste of measurement resources on unsuitable resources.
2Measurement precision
If LOS determination is performed for all resources, then positioning accuracy is improved, but processing time increases
Solution Approach 1:
Instead of performing comprehensive LOS determination on all possible resources, the WTRU applies partial action by determining LOS conditions only for resources that are actually configured for phase measurements. This selective approach reduces processing time while maintaining positioning accuracy, as the WTRU avoids unnecessary LOS checks for unconfigured resources.
3Reliability
If phase measurements are reported without LOS filtering, then data volume increases, but positioning reliability decreases
Solution Approach 1:
The WTRU extracts and filters out measurements that do not satisfy LOS conditions before reporting. By taking out only the necessary LOS determination step and applying it selectively to configured resources, the system reduces the volume of reported measurement data while improving reliability, as only high-quality LOS measurements are included in the final report.
Data Source
AI summary
A method implemented in a wireless transmit/receive unit (WTRU) is provided. The method may include receiving configuration information indicating (i) a set of positioning reference signal (PRS) resources and (ii) a time window to be used for phase measurement with the set of PRS resources. The method may include determining a phase difference measurement based on a first PRS of a first plurality of PRS and a second PRS of a second plurality of PRS, the first and the second PRS being received in the time window. The method may include determining a reference signal time difference (RSTD) measurement based on the first PRS of the first plurality of PRS and a third PRS of the second plurality of PRS and transmitting reporting information indicating the determined phase difference measurement and the determined RSTD measurement.