Beam Reselection for Positioning Accuracy
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Solution Overview
Problem
Current wireless communication systems face challenges in accurately reporting positioning measurements due to beam failures and non-line-of-sight (NLOS) conditions, which degrade positioning accuracy and increase latency.
Innovation Solution
The implementation of a method and apparatus in user equipment (UE) that receive positioning measurement configuration information, including a list of candidate beams with associated positioning reference signals, priority indicators, and reporting criteria, allowing for rapid beam reselection and switching based on timing, priority, and LOS/NLOS indicators to maintain positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If beam reselection and switching are performed rapidly based on timing, priority, and LOS/NLOS indicators, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The network pre-configures candidate beam lists with priority indicators and LOS/NLOS indicators before the UE needs to perform beam reselection. This preliminary configuration reduces the complexity of real-time decision-making by providing pre-evaluated beam options, allowing the UE to quickly select beams based on pre-computed metrics without performing complex real-time analysis
Solution Approach 2:
The UE autonomously performs beam reselection by independently evaluating candidate beams against pre-configured criteria (priority indicators, LOS/NLOS indicators, temporal switching criteria) without requiring continuous network intervention. This self-service mechanism improves positioning accuracy through rapid beam switching while limiting complexity growth by using simple comparison logic rather than complex algorithms
2Measurement precision
If multiple candidate beams are monitored and measured, then positioning accuracy is improved, but use of energy increases
Solution Approach 1:
Instead of monitoring all possible beams, the UE monitors only a limited set of candidate beams provided by the network. The network configures a manageable number of candidate beams (e.g., top N beams) that are most likely to be suitable, allowing the UE to achieve good positioning accuracy by measuring only this partial set rather than exhaustively searching all beams, thus reducing energy consumption
Solution Approach 2:
The candidate beam list is tailored to local conditions by including beams that are relevant to the UE's specific environment and location. The network provides customized candidate beam configurations based on local network topology and propagation conditions, enabling the UE to focus measurement energy on locally optimal beams rather than uniformly monitoring all beams across the network
3Measurement precision
If beam reselection is performed rapidly to maintain positioning accuracy, then positioning accuracy is improved, but loss of time occurs due to measurement and reporting overhead
Solution Approach 1:
The network pre-configures reporting criteria including thresholds and triggers before the UE needs to report measurements. This allows the UE to quickly compare measured values against pre-set thresholds and determine whether reporting is necessary, reducing the time spent on real-time decision-making and enabling faster beam reselection while maintaining positioning accuracy
Solution Approach 2:
The reporting mechanism is made dynamic by allowing the UE to adaptively determine when reporting is necessary based on real-time conditions. The UE can skip reporting when measurements meet predetermined criteria (e.g., when beam quality is sufficient or when no beam reselection is needed), reducing unnecessary reporting overhead and latency while maintaining positioning accuracy through selective reporting
Data Source
AI summary
Apparatuses, methods, and systems are disclosed for reporting positioning measurements. One method includes receiving positioning measurement configuration information including: a list of candidate beams, wherein each candidate beam of the list of candidate beams is associated with a positioning reference signal; a priority indicator; a temporal switching criteria; and/or a reporting criteria for positioning. The reporting criteria includes a positioning reference signal received power, a non-line-of-sight measurement indicator, a line-of-sight measurement indicator, and/or a reporting priority for each candidate beam of the list of candidate beams. The method includes measuring a positioning reference signal associated with each candidate beam of the list of candidate beams based on an associated positioning reference signal configuration. The method includes reporting positioning measurements based on the reporting criteria for at least one candidate beam of the list of candidate beams.