5G NR Channel Measurement Sub-band Segmentation
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Solution Overview
Problem
Current channel measurement methods in 5G NR systems face challenges in accurately distinguishing channel differences within large frequency intervals, leading to poor communication conditions due to the averaging of power measurements across entire bandwidths, which results in poor channel selection and decreased system communication quality.
Innovation Solution
The method involves dividing frequency domain resources into sub-bands during channel measurement, allowing terminal devices to perform measurements and obtain refined power measurement results, thereby improving the accuracy of channel selection and communication quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If channel measurement is performed across entire bandwidth, then measurement coverage is complete, but measurement precision deteriorates due to averaging effect
Solution Approach 1:
The patent divides the frequency domain into multiple sub-bands (first sub-band, second sub-band, etc.) within the bandwidth part. The terminal performs channel measurement separately on each sub-band, obtaining sub-band power measurement results. This segmentation allows precise measurement of channel characteristics in different frequency regions without the averaging effect that occurs when measuring across the entire bandwidth, thereby resolving the contradiction between measurement precision and system complexity.
2Measurement precision
If frequency domain resources are divided into sub-bands, then measurement precision improves, but measurement time increases
Solution Approach 1:
The patent performs preliminary configuration of sub-band division and measurement parameters before actual channel measurement. The network side device configures the bandwidth part and sub-band structure in advance, allowing the terminal to perform measurements efficiently without time-consuming real-time calculations during measurement. This preliminary setup reduces measurement time while maintaining high precision through the pre-defined sub-band structure.
3Reliability
If beam-based sending and reception is used in FR2 band, then coverage is improved, but channel measurement accuracy deteriorates due to fast attenuation
Solution Approach 1:
The patent applies local quality measurement by measuring channel characteristics separately in different frequency sub-bands rather than uniformly across the entire bandwidth. Each sub-band measurement captures the local channel properties specific to that frequency region, accounting for the fast attenuation characteristics in FR2 band. This localized measurement approach enables accurate channel state information to be obtained for each sub-band, which then guides precise beam selection and communication parameter optimization, resolving the contradiction between coverage and measurement accuracy.
Data Source
AI summary
A channel measurement method, the method includes: determining frequency domain measurement accuracy of a terminal during channel measurement; and performing channel measurement according to the frequency domain measurement accuracy.