Combined CQI Reporting for Multi-TCI PDSCH Reception
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in improving the reliability and throughput of downlink data channels due to the complexity of managing multiple transmission configuration indicators (TCI) states, which can lead to increased overhead in control information and potential communication outages from beam blockages.
Innovation Solution
The system enables the transmission and receipt of improved quality reports by performing beam quality measurements using multiple TCI states and configuring filtering coefficients, allowing for a combined beam quality report that compares different channel quality indicator (CQI) measurements, thereby optimizing modulation and coding schemes based on differential CQI/RSRP feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple TCI states are used to improve throughput, then channel quality measurement accuracy is improved, but control information overhead increases
Solution Approach 1:
The patent combines multiple individual CQI measurements (one per TCI state) into a single combined CQI value that represents the overall channel quality across all beams. This merging approach allows the UE to report channel quality for multiple TCI states without transmitting separate CQI values for each state, thereby reducing control information overhead while maintaining measurement accuracy.
Solution Approach 2:
The combined CQI reporting mechanism serves multiple functions simultaneously: it provides channel quality information for all TCI states, enables beam quality comparison, and supports modulation and coding scheme selection. This multi-functional approach eliminates the need for separate reporting mechanisms for each TCI state, reducing overhead while maintaining comprehensive quality assessment capability.
2Reliability
If multiple beams are transmitted to improve reliability, then communication reliability is improved, but device complexity increases
Solution Approach 1:
The patent merges the complexity of managing multiple beams by combining their individual quality measurements into a single combined CQI report. Instead of processing and reporting separate CQI values for each beam, the UE performs integrated measurements and reports a unified quality assessment, thereby reducing device complexity while maintaining the reliability benefits of multi-beam transmission.
Solution Approach 2:
The patent implements a feedback mechanism where the UE measures channel quality for multiple TCI states, compares the measurements, and reports the results to the base station. This feedback loop enables the base station to select appropriate modulation and coding schemes based on the combined beam quality, simplifying the beam management process while maintaining high communication reliability.
3Measurement precision
If beam quality measurements are performed for all TCI states, then channel quality assessment accuracy is improved, but measurement time increases
Solution Approach 1:
The patent combines multiple individual CQI measurements into a single combined CQI calculation that reflects the overall channel quality across all TCI states. By performing integrated measurements rather than separate sequential measurements for each beam, the system achieves accurate channel quality assessment without proportionally increasing measurement time, as the combined calculation can be performed efficiently using the individual measurement results.
Data Source
AI summary
The present disclosure relates to transmitting and receiving improved quality reports using different transmission states. A base station may transmit to a user equipment (UE) a channel comprising multiple beams, wherein the beams include different Transmission Configuration Indicator (TCI) states. The UE can then perform beam quality measurements for the multiple beams. The beam quality measurements can include different channel quality indicator (CQI) measurements and can be performed using the same or different spatial filters. The UE can then determine a combined beam quality report for the different beams and transmit the report to the base station. The beam quality report can also comprise a comparison of, the difference between, or the average of, the different CQI measurements. The UE can also receive a configuration of filtering coefficients from the base station, wherein the beam quality report comprises filtered CQI information.