Wireless Network Measurement System Calibration
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Solution Overview
Problem
Existing wireless network measurement systems face challenges in accurately assessing connection quality due to variations in radio frequency signal exposure caused by slight differences in test device positions, leading to inconsistent measurement values.
Innovation Solution
A measurement system comprising multiple test devices with a calibration controller that determines individual correction factors based on connection quality measurements, allowing for adaptation of signal exposure to a unified baseline, thereby reducing measurement deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple test devices are used to perform parallel measurements, then measurement data quantity and evaluation depth are improved, but measurement precision deteriorates due to positional variations causing RF signal exposure differences
Solution Approach 1:
The patent applies parameter changes by calculating individual correction factors for each test device based on their specific positional and orientational characteristics. These correction factors adjust the measurement parameters (RF signal values) to compensate for positional variations, allowing multiple devices to provide consistent measurements despite being at different locations. This resolves the contradiction by transforming the raw measurements through device-specific parameters.
Solution Approach 2:
The system implements feedback by using a calibration mode where test devices measure reference signals from the wireless network, and the controller calculates correction factors based on these measurements. The correction factors are then applied in normal operation mode to adjust subsequent measurements. This feedback loop ensures that positional variations are continuously compensated, maintaining measurement precision while utilizing multiple devices.
2Adaptability or versatility
If test devices are positioned at different locations, then measurement coverage and network evaluation capability are improved, but measurement precision deteriorates due to different RF signal exposure
Solution Approach 1:
The patent applies local quality by determining individual correction factors for each test device based on its specific local conditions (position and orientation). Each device has its own correction factor that accounts for its unique RF signal exposure characteristics. This allows the system to maintain measurement precision for each local position while achieving overall network coverage through multiple devices at different locations.
Solution Approach 2:
The system changes the measurement parameters by applying device-specific correction factors that compensate for local positional and orientational variations. This transformation allows measurements from different locations to be normalized and compared, achieving both wide coverage and consistent precision across all measurement points.
3Measurement precision
If calibration mode is implemented to determine correction factors, then measurement precision is improved, but time consumption increases due to additional calibration steps
Solution Approach 1:
The patent applies preliminary action by performing calibration measurements in a dedicated calibration mode before normal operation. During this preliminary phase, test devices measure reference signals and the controller calculates correction factors that are stored for subsequent use. This preliminary calibration ensures high measurement precision in normal operation without requiring continuous calibration, thus balancing accuracy with time efficiency.
Data Source
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AI summary
The present invention provides a measurement system (1, 21) and a method for measuring a connection quality to a wireless network (2). The measurement system comprises a plurality of test devices (4 to 7, 24 to 27), the test devices (4 to 7, 24 to 27) each comprising a communication unit (8 to 11) configured to communicate with the wireless network (2) and a measurement unit (12 to 15) configured to measure the connection quality to the wireless network (2), a calibration controller (17, 37) configured to determine in a calibration mode the connection quality of each one of the test devices (4 to 7, 24 to 27) to the wireless network (2), and to calculate for every test devices (4 to 7, 24 to 27) an individual correction factor (18, 38) based on the connection quality determined during the calibration mode, and a signal adaption unit (19, 39) configured to adapt the measured connection quality of each one of the test devices (4 to 7, 24 to 27) according to the respective individual correction factor (18, 38).