Repeated CORESET Channel Estimation Using All DM-RSs
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Solution Overview
Problem
Reduced capability UEs in new radio (NR) systems face challenges in achieving low cost, low complexity, and coverage enhancement, particularly in supporting physical downlink control channel (PDCCH) repetitions.
Innovation Solution
Perform channel estimation using N continuous repeated CORESETs that share the same frequency domain resource and/or precoding matrix, enabling accurate channel estimation through DM-RSs across these CORESETs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PDCCH repetitions are used for coverage enhancement, then coverage is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple DM-RS resources from N repeated CORESETs into a unified channel estimation process. By merging the channel estimation results from all repeated transmissions using the same frequency domain resource and precoding matrix, the system achieves better coverage enhancement while managing device complexity through resource consolidation rather than independent processing of each repetition.
Solution Approach 2:
The patent makes the channel estimation mechanism universal across multiple repeated CORESETs. The same channel estimation procedure is applied to all N repetitions, allowing the system to handle coverage enhancement scenarios uniformly without requiring separate complex processing paths for each repetition, thus reducing overall device complexity.
2Measurement precision
If channel estimation uses all DM-RSs from N repeated CORESETs, then channel estimation accuracy is improved, but processing complexity increases
Solution Approach 1:
The patent merges channel estimation results from multiple DM-RS resources across N repeated CORESETs. By combining the estimation outcomes from all repetitions that share the same frequency domain resource and precoding matrix, the system improves channel estimation accuracy through aggregated information while managing processing complexity through systematic resource grouping.
Solution Approach 2:
The patent changes the parameter of resource aggregation by utilizing all DM-RSs from N repeated CORESETs instead of processing them independently. This parameter change from individual to aggregated processing improves measurement precision while the systematic approach to handling the aggregated data keeps processing complexity manageable.
3Reliability
If reduced capability UE supports PDCCH repetitions, then coverage enhancement is achieved, but cost and complexity increase
Solution Approach 1:
The patent implements a universal channel estimation approach that works across all N repeated CORESETs for reduced capability UEs. By applying the same channel estimation procedure uniformly to all repetitions, the system achieves coverage enhancement without requiring complex UE-specific processing logic for each repetition, thus controlling UE complexity while maintaining multi-functionality.
Solution Approach 2:
The patent merges the processing of multiple repeated PDCCH transmissions into a unified channel estimation framework. By combining DM-RS resources from all N repetitions and processing them together, the system achieves coverage enhancement for reduced capability UEs while reducing the overall processing burden compared to handling each repetition separately.
Data Source
AI summary
A method for channel estimation includes: performing channel estimation using all DM-RSs in N continuous repeated CORESETs, where N is a positive integer greater than 1; in which the N continuous repeated CORESETs correspond to the same frequency domain resource and/or the same precoding matrix.