Calibration Factor for Inter-RAT Signal Comparison
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Solution Overview
Problem
Wireless communication networks face challenges in accurately comparing received signal strengths across different Radio Access Technologies (RATs) due to varying sampling rates, leading to inefficient handover processes of wireless user devices.
Innovation Solution
A method is introduced where a calibration factor is applied to normalize signal strengths measured at different sampling rates, allowing for accurate comparison and efficient handover decisions between different RAT types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If different sampling rates are used for measuring signal strength of different RAT types, then measurement efficiency is improved, but measurement precision deteriorates
Solution Approach 1:
The patent changes the parameter of signal strength values by applying calibration factors to transform measurements taken at different sampling rates into a common reference frame. This allows efficient multi-RAT monitoring with different sampling rates while maintaining accurate comparison capability through parameter transformation.
Solution Approach 2:
The patent introduces calibration factors as intermediary elements that mediate between measurements taken at different sampling rates. These calibration factors serve as a reference standard that enables accurate comparison without requiring uniform sampling rates across all RAT types, thus resolving the contradiction between measurement efficiency and precision.
2Device complexity
If direct comparison of measured signal strengths is performed without calibration, then device complexity is reduced, but reliability deteriorates
Solution Approach 1:
The patent transforms raw signal strength measurements into calibrated values by applying calibration factors before comparison. This parameter transformation ensures reliable handover decisions while maintaining relatively simple device complexity, as the calibration process can be implemented through straightforward multiplication operations rather than complex algorithms.
Solution Approach 2:
The patent performs preliminary calibration of signal strength measurements before they are used for handover decisions. By pre-multiplying measurements by their respective calibration factors and storing these calibrated values, the system ensures reliable comparisons are always available without adding complexity to the real-time decision-making process.
Data Source
AI summary
Various embodiments comprise a wireless access node configured to steer a wireless user device to a RAT type. The wireless access node comprises radio circuitry and node circuitry. The radio circuitry receives a measurement report from a wireless user device for a first RAT type and a second RAT type. The sampling rate for the first measured signal strength is different than the sampling rate for the second measured signal strength. The node circuitry applies a calibration factor to the second measured signal strength to normalize the second measured signal strength with the first measured signal strength. The node circuitry compares the normalized second measured signal strength to the first measured signal strength. The radio circuitry wirelessly transfers an attachement instruction to the wireless user device to attach to the first RAT type or the second RAT type based on the comparison.