Hierarchical UE Positioning via Beam Selection
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Solution Overview
Problem
Current 5G wireless communication systems face challenges in efficiently determining the position of user equipment (UE) with high accuracy and low latency, particularly in scenarios requiring reduced power consumption and optimized reference signal transmission.
Innovation Solution
The implementation of techniques for on-demand positioning resource configuration and hierarchical position information determination, where UE sends an uplink reference signal and requests positioning resources, receives and measures downlink reference signals, and reports back to select the best beams for further signal transmission, allowing for refined beam selection and reduced power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE receives and measures all downlink reference signals in all beams, then positioning accuracy is improved, but power consumption and processing load increase
Solution Approach 1:
The patent segments the beam measurement process into two stages: first, the UE measures reference signals in a subset of beams (e.g., beams corresponding to serving cells or preferred beams); second, based on these partial measurements, the UE determines a reduced set of beams to report. This segmentation allows the UE to achieve sufficient positioning accuracy without processing all possible beams, thereby reducing power consumption and processing load.
Solution Approach 2:
The patent applies partial action by having the UE measure and report only a subset of beams rather than all available beams. The network entity uses these partial measurements to determine positioning information, which is sufficient for the intended application. This partial approach reduces the UE's processing burden and energy consumption while maintaining adequate positioning performance.
2Reliability
If the UE reports all measured beams, then positioning performance is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts only the essential information needed for positioning from the complete set of beam measurements. The UE identifies and reports only the most relevant beams (e.g., beams with highest signal strength or those corresponding to serving cells), extracting the critical positioning data while discarding redundant information. This reduces signaling overhead while maintaining positioning performance.
Solution Approach 2:
The patent applies partial reporting by having the UE transmit only a subset of beam measurements rather than all measured beams. The network entity processes this partial information to derive positioning results, which is sufficient for the application requirements. This partial reporting mechanism significantly reduces signaling overhead compared to transmitting all beam measurements.
3Reliability
If the network transmits reference signals in all beams, then coverage and signal quality are improved, but time to establish connection increases
Solution Approach 1:
The patent applies preliminary action by having the UE perform beam measurements and identify preferred beams during the connection establishment process. The UE measures reference signals in a subset of beams and reports these measurements, allowing the network to pre-determine the optimal beams for communication. This preliminary beam selection reduces the time needed to establish the final connection, as the network already has information about which beams provide the best signal quality.
Data Source
AI summary
A method for facilitating position information determination includes: sending, from a UE, an uplink reference signal to one or more base stations and a request for positioning resources to a network entity; receiving, at the UE from one or more of the one or more base stations, a plurality of first downlink reference signals in a first plurality of beams in response to the uplink reference signal and the request; determining, at the UE, a second plurality of beams, from the first plurality of beams, based on one or more respective measurements of the plurality of first downlink reference signals; and sending, from the UE to the network entity, a beam report indicating the second plurality of beams.