Uplink Positioning Reference Signal Measurement Reporting
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Solution Overview
Problem
Current 5G wireless communication systems face challenges in accurately determining the location of user equipment (UE) in non-line-of-sight conditions due to multipath signal propagation, which affects positioning accuracy and requires improved methods for reporting and processing uplink positioning reference signals.
Innovation Solution
A base station receives uplink positioning reference signals from user equipment, determines multiple measurement values such as power and timing, and sends a report to a server, which uses these measurements to improve location estimation by creating multipath and multi-antenna-element channel profiles, enhancing positioning accuracy, especially in non-line-of-sight conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple measurement values are reported per reference signal, then positioning accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent segments the measurement reporting by organizing multiple measurement values into structured groups, each associated with specific reference signals. The measurement report includes measurement values for different reference signals (e.g., SSB, CSI-RS) with their respective identifiers, allowing the network to process only relevant measurements for positioning purposes while reducing unnecessary signaling overhead.
Solution Approach 2:
The patent introduces a new dimensional structure to the measurement report by including not only measurement values but also associated reference signal identifiers, resource configurations, and measurement timing information. This multi-dimensional organization allows efficient filtering and processing of positioning-relevant measurements without transmitting redundant data.
2Measurement precision
If multiple measurement values are reported per reference signal, then positioning accuracy in non-line-of-sight conditions is improved, but message size increases
Solution Approach 1:
The patent extracts and reports only the essential measurement values relevant to positioning accuracy, such as reference signal received power (RSRP) and reference signal received quality (RSRQ), along with their associated reference signal identifiers. By selecting and reporting only the critical measurements needed for positioning in non-line-of-sight conditions, the message size is optimized while maintaining improved positioning accuracy.
3Measurement precision
If detailed channel profiles are created using multiple measurements, then location estimation accuracy is improved, but processing complexity increases
Solution Approach 1:
The patent performs preliminary organization and filtering of measurement values at the base station before forwarding them to the location server. The measurement report is pre-structured with relevant measurement data grouped by reference signal type and identifier, allowing the location server to directly use the organized data for channel profile creation without requiring complex preprocessing, thus reducing overall processing complexity while maintaining high location estimation accuracy.
Data Source
AI summary
A method of reporting measurements of an uplink positioning reference signal includes: receiving, at a base station, the uplink positioning reference signal from a user equipment; determining, at the base station, a plurality of measurement values of the uplink positioning reference signal, each of the plurality of measurement values being of a same type of measurement, and corresponding to the uplink positioning reference signal; and sending, from the base station to a server, a report including the plurality of measurement values of the uplink positioning reference signal and at least one indication that the plurality of measurement values corresponds to a same uplink positioning reference signal.