Radio Link Monitoring CORESET Selection Criteria
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Solution Overview
Problem
In New Radio (NR) systems, there is a lack of guidance on how User Equipment (UE) should choose a Control Resource Set (CORESET) for Radio Link Monitoring (RLM) when multiple quasi-colocated CORESETS are configured, leading to ambiguity in determining the appropriate CORESET for reliable radio link quality assessment.
Innovation Solution
The UE is provided with specific criteria to determine the PDCCH parameters for RLM, including choosing the CORESET based on parameters such as the one used for PDCCH monitoring, lowest or highest index, minimum or maximum hypothetical PDCCH BLER, to ensure accurate radio link quality monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple quasi-colocated CORESETS are configured for PDCCH monitoring, then the system provides more flexibility and robustness for control channel reception, but it creates ambiguity in selecting the appropriate CORESET for radio link monitoring
Solution Approach 1:
The patent applies parameter changes by introducing specific selection criteria based on CORESET indices (lowest or highest) and hypothetical PDCCH BLER values. These parameter-based rules transform the ambiguous multi-CORESET scenario into a deterministic selection process, where the UE can objectively determine which CORESET to use for RLM based on predefined parameters rather than making subjective choices.
2Reliability
If the UE monitors multiple CORESETS for PDCCH, then the reliability of control channel reception improves, but the complexity of determining RLM parameters increases
Solution Approach 1:
The patent resolves the complexity issue by establishing clear parameter-based selection rules. Instead of requiring complex algorithms to evaluate multiple CORESETS, the UE simply compares parameters such as CORESET indices and hypothetical BLER values to determine the appropriate CORESET for RLM. This parameter-driven approach maintains reliability while reducing determination complexity.
3Measurement precision
If specific selection criteria are implemented for CORESET choice in RLM, then the precision of radio link quality assessment improves, but the device complexity increases due to additional determination logic
Solution Approach 1:
The patent achieves measurement precision improvement through parameter-based selection without significantly increasing device complexity. The selection criteria rely on comparing existing parameters (CORESET indices, hypothetical BLER values) that are already available in the system. This approach provides accurate and consistent RLM parameter determination while avoiding the need for complex evaluation algorithms.
Data Source
AI summary
Methods, systems, and storage media are described for the Embodiments discussed herein may relate to enhancements to radio link monitoring (RLM) for new radio (NR) systems. Other embodiments may be described and/or claimed.