Radio Node CSI Measurement Across Different Numerologies
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Solution Overview
Problem
Wireless communication systems face challenges in efficiently supporting multiple numerologies, leading to increased power consumption and performance degradation due to the need for multiple CSI measurements and resource management across different sub-carrier spacings.
Innovation Solution
A radio node is configured to measure CSI on a preferred numerology and generate CSI for other numerologies, using techniques such as upconverting or downconverting transmitter or receiver configurations, and interpolating or low-pass filtering precoder coefficients to enable efficient channel information reporting and signal transmission across different sub-carrier spacings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple CSI measurements are performed for different numerologies, then channel information accuracy is improved, but power consumption increases
Solution Approach 1:
The patent combines multiple CSI measurements from different numerologies by mapping resource elements between numerologies with different sub-carrier spacings. The UE performs channel measurements on reference signals across multiple numerologies and combines these measurements to derive a single CSI report, reducing the need for separate measurements while maintaining accuracy.
Solution Approach 2:
The patent enables a single CSI measurement mechanism to serve multiple numerologies simultaneously. By establishing mapping relationships between resource elements of different numerologies, the system allows one measurement process to provide channel information for multiple numerologies, reducing overall measurement overhead and power consumption.
2Measurement precision
If multiple CSI measurements are performed for different numerologies, then channel information accuracy is improved, but device complexity increases
Solution Approach 1:
The patent segments the CSI measurement process by dividing it into distinct measurement phases for different numerologies, followed by a combination phase. The UE measures reference signals on each numerology separately, then combines the measurements using established mapping relationships, making the complex process more manageable and systematic.
Solution Approach 2:
The patent introduces mapping relationships as an intermediary mechanism between different numerologies. These mapping relationships serve as a bridge that connects resource elements of different numerologies, allowing the UE to translate measurements from one numerology to another without direct complex interactions between multiple measurement processes.
3Adaptability or versatility
If CP duration is kept constant while sub-carrier spacing increases, then numerology flexibility is improved, but delay spread margin decreases
Solution Approach 1:
The patent employs dynamic numerology selection and switching mechanisms that allow the system to adapt CP duration based on channel conditions and numerology requirements. The UE can dynamically adjust between different numerologies with appropriate CP configurations, optimizing both flexibility and reliability for different transmission scenarios.
Data Source
AI summary
Systems and methods of determining a transmitter or receiver configuration in a wireless communication system are provided. In one exemplary embodiment, a method performed by a radio node (101, 111, 200, 300a-b, 500, 700a-b) in a wireless communication system (100) comprises determining (405) a first transmitter or receiver configuration for transmission or reception in a first frequency spectrum (121) having a first sub-carrier spacing (123) based on a channel information measurement in a second frequency spectrum (131) having a second sub-carrier spacing (133), wherein the first (123) and second (133) sub-carrier spacings are different and the first (121) and second (131) frequency spectrums overlap.