Dynamic CQI Table Switching for Learned Wireless Constellations
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Solution Overview
Problem
Current wireless communication specifications lack procedures to handle learned constellations and dynamic MCS tables, which can improve bit error rate and throughput performance.
Innovation Solution
A wireless transmit/receive unit (WTRU) is configured to determine and switch between preconfigured and learned modulation schemes based on signal-to-noise ratio (SNR) and Mean Square Error (MSE) measurements, using AI/ML models for learned constellations with non-equal distances, and apply appropriate MCS tables for demodulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If learned constellations and dynamic MCS tables are used, then bit error rate and throughput performance are improved, but current specifications lack defined procedures for handling them
Solution Approach 1:
The patent changes the modulation parameters by introducing learned constellations with non-uniform symbol distributions and dynamic MCS tables that adapt to channel conditions. This allows the system to optimize bit error rate and throughput performance by selecting optimal modulation schemes based on real-time channel quality measurements, thereby resolving the contradiction between improved reliability and specification complexity.
2Productivity
If learned constellations are used, then throughput performance is improved, but procedures to handle dynamic MCS tables and mappers are not defined
Solution Approach 1:
The patent performs preliminary actions by pre-configuring multiple MCS tables (first MCS table for preconfigured modulations and second MCS table for learned modulations) and pre-defining the selection criteria based on channel quality indicators. This allows the system to switch between different modulation schemes smoothly without requiring complex real-time decision procedures, thereby improving throughput while maintaining operational simplicity.
3Adaptability or versatility
If dynamic CQI table selection is implemented, then channel adaptation is improved, but measurement and comparison complexity increases
Solution Approach 1:
The patent implements feedback mechanisms by measuring channel quality using reference signals and comparing performance metrics (such as signal-to-noise ratio and mean square error) between different modulation schemes. The system uses this feedback to dynamically select the appropriate CQI table and modulation scheme, thereby achieving adaptive channel optimization while keeping measurement and comparison processes manageable through standardized metrics.
Data Source
AI summary
A wireless transmit/receive unit (WTRU) comprises a processor configured to receive configuration information that may include an indication of a first Channel Quality Indicator (CQI) table associated with preconfigured modulations. The configuration information may include an indication of a second CQI table associated with learned modulations. The processor may determine first measurements associated with a plurality of reference signals (RSs) of a first type that may be associated with the preconfigured modulations. The processor may determine second measurements associated with a plurality of RSs of a second type that may be associated with the learned modulations. The processor may determine to use the second CQI table instead of the first CQI table based on a comparison between the second measurements associated with the plurality of RSs of the second type with the first measurements associated with the plurality of RSs of the first type. The processor may send a report.