Fingerprinting Using Function-Based Matching Patterns
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Solution Overview
Problem
Classic fingerprinting approaches in wireless communications are susceptible to interference from temporary effects such as moving objects and environmental changes, leading to inaccurate positioning of user equipment (UE).
Innovation Solution
The method employs multiple receiver beams and dynamic beam configurations to capture and store signal strength patterns over time, using function-based matching to improve positioning accuracy by accounting for changes in signal characteristics and antenna directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If classic fingerprinting approaches are used with single received signal strength per base station, then the system is simple to implement, but the positioning accuracy deteriorates due to interference from temporary effects
Solution Approach 1:
The patent applies dynamics by transitioning from static single-snapshot fingerprinting to dynamic multi-snapshot fingerprinting. The system captures multiple signal strength measurements at different time instances and uses temporal patterns to distinguish between permanent and temporary environmental effects, thereby improving positioning accuracy without requiring overly complex hardware modifications.
Solution Approach 2:
The patent implements preliminary action through the calibration phase, where reference measurements are captured and stored in advance under various environmental conditions. This pre-acquired data enables the system to later differentiate between normal variations and temporary interference, improving measurement precision while maintaining implementation simplicity.
2Measurement precision
If multiple receiver beams and dynamic beam configurations are used to capture signal patterns over time, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The patent employs dynamics by utilizing multiple receiver beams that can be dynamically configured and switched. The system captures signal strength patterns across different beam directions and time instances, creating a multi-dimensional fingerprint that improves positioning accuracy while managing complexity through structured beam management procedures.
Solution Approach 2:
The patent applies segmentation by dividing the receiving function into multiple independent receiver beams. Each beam captures signal information from specific spatial directions, and the system combines these segmented measurements to form a comprehensive fingerprint profile, thereby improving accuracy without requiring a single overly complex receiver.
3Reliability
If function-based matching is used to account for changes in signal characteristics, then robustness is improved, but measurement and processing complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-calibrating the system to capture reference signal patterns under various environmental conditions and storing them in a database. During operation, the system compares current measurements against this pre-established reference data, simplifying the matching process while maintaining high robustness against environmental variations.
Solution Approach 2:
The patent employs feedback mechanisms where the system continuously monitors signal characteristics and compares them against stored reference patterns. This feedback loop enables the system to adapt to environmental changes and distinguish between permanent features and temporary interference, improving reliability while managing processing complexity through efficient pattern matching algorithms.
Data Source
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AI summary
The embodiments herein relate to method performed by a measurement device (801, 1000), the method comprising: receiving (901), via higher layer signalling, information on resources or resource sets of one or more radio transmission devices transmitting one or more beam signals associated with said resources or resource sets; performing (902) channel measurements of the one or more beam signals, per spatial filter or receiver beam of the measurement device; storing (903), over at least one time frame, the channel measurements into measurement groups, where each measurement group corresponds to the channel measurements performed using the same spatial filter of the measurement device; and reporting (904) the measurement groups to a network node (804, 1200) or correlating the measurements of each measurement group with reference data for each available time frame individually and reporting the result of the correlation to the network node (804, 1200). The embodiments also relate to a method performed by a network node (804, 1200).