Beam-Based PRS Reporting for Accurate DL-AOD Positioning
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Solution Overview
Problem
Existing 5G positioning technologies lack procedures and measurements for improved accuracy in downlink angle of departure (DL-AOD) for UE-based and network-based positioning applications.
Innovation Solution
A method for selecting and reporting DL PRS resources for enhanced DL-AOD measurements, including resource neighbor information and measurement selection by the UE, and network-controlled UE behavior for accurate interpolation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If DL PRS resources are configured for positioning measurements, then positioning capability is provided, but measurement accuracy is insufficient for improved DL-AOD determination
Solution Approach 1:
The patent segments the DL PRS resources into different types (e.g., anchor resources, neighbor resources) with different measurement requirements. The UE performs measurements on anchor resources to determine serving TRP position, and selectively measures neighbor resources for interpolation. This segmentation enables accurate DL-AOD determination without requiring measurements on all resources, thus improving measurement precision while controlling procedure complexity.
Solution Approach 2:
The patent implements preliminary actions by having the network configure measurement resources and parameters before the UE performs measurements. The UE first identifies anchor resources and determines serving TRP position, then uses this information to selectively measure neighbor resources. This preliminary setup enables more accurate DL-AOD measurements without increasing overall procedure complexity.
2Reliability
If all DL PRS resources are measured, then comprehensive positioning data is obtained, but measurement time and processing load increase
Solution Approach 1:
The patent applies partial action by having the UE measure only a subset of DL PRS resources rather than all resources. The UE performs measurements on anchor resources and selectively measures neighbor resources based on configuration and initial measurement results. This partial measurement approach maintains reliable positioning data while significantly reducing measurement time and processing load compared to measuring all resources.
Solution Approach 2:
The patent implements local quality by applying different measurement strategies to different resource types. Anchor resources receive full measurement attention as they provide critical positioning data, while neighbor resources are measured selectively based on their relevance to interpolation. This differentiated approach ensures positioning data reliability for critical resources while reducing overall measurement time.
3Measurement precision
If neighbor resource information is provided to UE, then measurement selection accuracy improves, but signaling overhead increases
Solution Approach 1:
The patent extracts only the essential neighbor resource information needed for measurement selection, rather than providing complete resource details. The network provides configured neighbor resource information that enables the UE to identify which resources to measure, but omits redundant details. This extraction approach improves resource selection accuracy while minimizing signaling overhead by including only necessary information.
Data Source
AI summary
A communication device in a communications network receives (1710) first configuration information from a network node in the communications network. The first configuration can include an indication of a downlink, DL, positioning reference signal, PRS, resource of a plurality of DL PRS resources. The communication device can further perform (1720) at least one DL angle of departure, AOD, measurement based on the first configuration information. The communication device can further receive (1730) second configuration information from the network node. The second configuration information can include an indication of a subset of the plurality of DL PRS resources. The communication device can further report (1750) one or more DL AOD measurements.