PDCCH Repetition Priority Rules for Overlapping CORESET QCL States
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing overlapping physical downlink control channel (PDCCH) repetitions with different spatial quasi-colocation (QCL) properties, leading to inefficiencies in PDCCH monitoring and resource allocation.
Innovation Solution
A method and apparatus for wireless communication that employs a priority rule for selecting CORESETs based on PDCCH repetition linkage, spatial QCL properties, and carrier indices to optimize PDCCH monitoring by prioritizing PDCCH repetition linkage, allowing simultaneous use of multiple spatial QCL properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PDCCH repetition is configured with different TCI states for diversity, then reliability is improved, but device complexity increases due to multiple QCL property handling
Solution Approach 1:
The patent changes the parameter of QCL property selection by introducing a priority rule that determines which TCI state's spatial QCL property to use when multiple PDCCH repetitions with different TCI states are configured. This resolves the contradiction by providing a deterministic parameter selection method that maintains reliability while simplifying UE processing complexity.
2Adaptability or versatility
If multiple CORESETs with different spatial QCL properties are monitored simultaneously, then adaptability is improved, but difficulty of detecting and measuring increases
Solution Approach 1:
The patent applies local quality by allowing different spatial QCL properties to be used for different CORESETs based on their associated TCI states. The priority rule determines which local QCL property to apply when overlaps occur, enabling adaptability while managing detection difficulty through a systematic selection process.
3Loss of information
If PDCCH monitoring is performed for all configured CORESETs, then information completeness is improved, but loss of time increases due to overlapping monitoring occasions
Solution Approach 1:
The patent implements partial action by allowing the UE to monitor PDCCH for multiple CORESETs with different spatial QCL properties only when necessary (i.e., when PDCCH repetition is configured and monitoring occasions overlap). The priority rule determines which CORESETs to monitor, avoiding unnecessary monitoring and reducing time loss while maintaining information completeness when needed.
Data Source
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AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive configuration information indicating physical downlink control channel (PDCCH) repetition for a first control resource set (CORESET) having a first transmission configuration indicator (TCI) state and a second CORESET having a second TCI state. The UE may monitor, based at least in part on the PDCCH repetition, PDCCH for a first set of CORESETs and a second set of CORESETs that at least partially overlap with each other in time, wherein PDCCH monitoring for the first set of CORESETs is based at least in part on a first spatial quasi-colocation (QCL) property and PDCCH monitoring for the second set of CORESETs is based at least in part on a second spatial QCL property different than the first spatial QCL property. Numerous other aspects are described.