Beam Directionality Calibration for 5G Positioning Accuracy
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Solution Overview
Problem
Existing wireless telecommunication systems, particularly 5G and NR, suffer from beam directionality errors at network nodes (gNBs) leading to positioning inaccuracies and resource inefficiencies due to unknown orientation uncertainties.
Innovation Solution
A method and apparatus for determining beam directionality errors by calculating relative angle-of-arrival and angle-of-departure measurements between base stations, identifying the affected nodes, and recalibrating them to improve positioning accuracy and resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If beam directionality measurements are performed using angle-of-arrival and angle-of-departure, then positioning accuracy is improved, but system complexity increases due to multiple measurement requirements
Solution Approach 1:
The user device autonomously performs angle-of-arrival measurements and calculates relative angle information without requiring direct intervention from the network. The device uses its own positioning information and received beam measurements to self-determine the relative angles, reducing network complexity while maintaining measurement precision.
Solution Approach 2:
The patent introduces relative angle information as an intermediary parameter that bridges the gap between angle-of-arrival measurements at the user device and angle-of-departure measurements at base stations. This intermediary enables error detection and correction without requiring direct complex coordination between all measurement points.
2Productivity
If beam directionality errors are detected and corrected, then resource utilization is improved, but processing overhead increases
Solution Approach 1:
The system performs preliminary error detection by calculating whether the sum of relative angle-of-arrival and angle-of-departure measurements equals 180 degrees before proceeding to full beam recalibration. This preliminary check identifies erroneous base stations in advance, allowing targeted corrections rather than comprehensive reprocessing, thus reducing overall processing overhead.
Solution Approach 2:
The patent changes the parameter being measured from absolute beam directions to relative angle differences. By focusing on the relative relationship between beams rather than absolute orientations, the system reduces processing complexity while maintaining the ability to detect and correct directionality errors, improving resource utilization efficiency.
Data Source
AI summary
An apparatus may include circuitry configured for providing first data indicative of a first relative angle-of-arrival measurement between a first base station and a second base station, from the position of a user device, based on angle-of-arrival measurements. The apparatus may also include circuitry configured for providing second data indicative of first and second angle-of-departure measurements, each measurement indicative of an angle between the user device and the other base station of the first set of base stations from the position of the respective first and second base stations based on a plurality of beams transmitted from the respective base station to the user device. The apparatus may also include circuitry configured for determining a beam directionality error associated with at least one of the first and second base stations based on the first relative angle-of-arrival measurement and the first and second angle-of-departure measurements.