Beam Selection Using Quasi-Colocation Information
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G, face challenges in efficiently prioritizing downlink positioning reference signals (PRS) due to the need to measure all available PRS resources, which consumes significant power and processing resources, especially when quasi-colocation (QCL) information is not readily available.
Innovation Solution
The system determines the availability of Synchronization Signal Block (SSB) measurements and performs SSB measurements if not available, then uses this information to identify optimal PRS beam sets for reduced search space, allowing for efficient PRS resource selection and measurement based on quasi-colocation information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If all available PRS resources are measured to ensure comprehensive positioning data, then positioning accuracy is improved, but power consumption and processing resources increase significantly
Solution Approach 1:
The patent extracts and utilizes QCL information to identify and select only the most relevant PRS beam sets for measurement, rather than measuring all available PRS resources. This extraction of useful information (QCL indicators) enables the system to filter out unnecessary measurement candidates and focus only on directionally aligned beams, thereby reducing power consumption while maintaining positioning accuracy.
Solution Approach 2:
The patent performs preliminary actions by measuring SSB signals first to obtain QCL information before performing PRS measurements. This preliminary SSB measurement step establishes the quasi-colocation relationships that guide subsequent PRS beam set selection, ensuring that only the most promising beams are measured, thus reducing overall power and processing requirements.
2Measurement precision
If all available PRS resources are measured to ensure comprehensive positioning data, then positioning accuracy is improved, but processing resources and computational load increase significantly
Solution Approach 1:
The patent extracts QCL information from SSB measurements to create a filtered set of candidate PRS beam sets. This extraction process reduces the search space from all available PRS resources to only those beams that are quasi-colocated with measured SSB signals, significantly reducing processing requirements while maintaining measurement precision through targeted sampling of the most relevant beams.
Solution Approach 2:
The patent performs preliminary SSB measurements to establish QCL relationships before conducting PRS measurements. This preliminary action creates a pre-computed guide for beam selection that reduces the computational burden during PRS processing, as the system only needs to evaluate beams that have been pre-identified as directionally aligned through the SSB measurement phase.
3Quantity of substance
If PRS measurements are performed without QCL information to ensure complete beam coverage, then measurement comprehensiveness is improved, but the efficiency of location estimation decreases
Solution Approach 1:
The patent introduces QCL information as an intermediary element that bridges SSB measurements and PRS measurements. This intermediary QCL data structure enables efficient beam set selection by indicating which PRS beams are quasi-colocated with measured SSB signals, thereby maintaining beam coverage comprehensiveness while significantly improving location estimation efficiency through guided beam selection.
Solution Approach 2:
The patent performs preliminary SSB measurements to establish QCL relationships that serve as a guide for subsequent PRS beam selection. This preliminary action creates a pre-computed mapping of directionally aligned beams, ensuring that the system maintains comprehensive beam coverage for location estimation while improving efficiency by avoiding measurements of beams that are not directionally aligned with the UE.
Data Source
AI summary
Disclosed are systems, apparatuses, methods, and non-transitory media for optimizing beam selection. In some aspects, the disclosed technology can include determining whether an SSB measurement is available, performing one or more SSB measurements, in response to a determination that the SSB is not available, and performing one or more PRS measurements based on the one or more SSB measurements.