AoD Reporting via Signal Strength Segmentation in 5G Positioning
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Solution Overview
Problem
Current wireless communication systems face challenges in accurately transmitting and utilizing angle of departure (AoD) information for improved positioning, particularly in 5G networks, where precise AoD data is crucial for enhancing the accuracy of user equipment (UE) positioning but is not effectively integrated into existing methods.
Innovation Solution
A method and device for reporting AoD information by a base station (BS) in a wireless communication system, which involves transmitting reference signals to user equipment (UE), receiving AoD information based on signal strengths, and transmitting this information to a location server, including identification of reference signals with the highest signal strengths and their corresponding signal strength differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If AoD information is transmitted using existing methods, then communication compatibility is maintained, but positioning accuracy is insufficient
Solution Approach 1:
The patent segments AoD information transmission by dividing reference signals into multiple groups (first group and second group) with different transmission configurations. This allows selective reporting of AoD information based on signal strength thresholds, improving positioning accuracy while managing transmission complexity through structured segmentation of the signal set.
Solution Approach 2:
The patent changes transmission parameters by configuring different report quantities (rq) for different reference signal groups. The UE reports AoD information with different detail levels based on signal strength, transforming a static reporting mechanism into a dynamic one that adapts to channel conditions, thereby improving positioning accuracy without overwhelming the system with constant high-volume reporting.
2Measurement precision
If multiple reference signals are transmitted for AoD measurement, then positioning accuracy improves, but signal strength differentiation becomes difficult
Solution Approach 1:
The patent applies local quality by assigning different report quantity configurations to different reference signal groups based on their signal characteristics. Stronger signals (first group) use one reporting configuration while weaker signals (second group) use another, allowing the system to optimize measurement and reporting for each local signal condition rather than applying a uniform approach to all signals.
Solution Approach 2:
The patent implements partial action by having the UE report AoD information selectively based on signal strength thresholds. Instead of reporting all reference signals uniformly, the system requests reporting only for signals that meet certain criteria (e.g., strongest signals in the first group), reducing measurement complexity while maintaining positioning accuracy through targeted reporting of the most relevant signals.
Data Source
AI summary
Disclosed is a method for reporting angle of departure (AoD) information by a base station in a wireless communication system. Particularly, the method is characterized by: transmitting multiple reference signals to a terminal; receiving, from the terminal, AoD information comprising information related to at least one reference signal obtained on the basis of the reception signal strength of the terminal, among the multiple reference signals; and transmitting the AoD information to a location server, wherein the multiple reference signals can be multiple synchronization signal/physical broadcast channel (SS/PBCH) blocks or multiple channel state information-reference signals (CSI-RSs).