QCL-Based CORESET Prioritization for Overlapping PDCCH Monitoring
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Solution Overview
Problem
User equipment (UE) in wireless communication systems faces challenges in efficiently decoding multiple physical downlink control channel (PDCCH) candidates across overlapping control resource sets (CORESETs) due to uncertainty about physical downlink control channel aggregation levels and the need for blind decoding, which can lead to resource inefficiencies.
Innovation Solution
The UE implements a prioritization rule to select a highest priority CORESET based on quasi-co-location (QCL) Type-D properties, allowing it to monitor PDCCH candidates efficiently by reducing the number of blind decodes and optimizing resource usage, particularly in scenarios with multiple QCL-Type-D properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE performs blind decoding of multiple PDCCH candidates across overlapping CORESETs, then coverage and reliability of control channel reception is improved, but decoding complexity and processing time increase
Solution Approach 1:
The patent applies preliminary action by establishing a predefined priority rule for selecting CORESETs before the actual decoding process. The UE is configured with criteria to determine which CORESET has highest priority based on QCL-Type-D properties, allowing the UE to pre-determine the decoding sequence and reduce real-time processing complexity while maintaining reliable reception of control information.
2Reliability
If UE monitors all PDCCH candidates in overlapping CORESETs, then communication reliability is improved, but processing time and resource consumption increase
Solution Approach 1:
The patent applies partial action by having the UE monitor only the PDCCH candidates in the highest priority CORESET rather than all candidates across all overlapping CORESETs. The priority rule ensures that the most important control information is captured, providing sufficient reliability without the full processing burden of monitoring every candidate, thus reducing processing time and resource consumption.
3Quantity of substance
If UE performs blind decoding without priority rules, then completeness of control channel reception is improved, but decoding efficiency decreases
Solution Approach 1:
The patent applies local quality by assigning different weights or priorities to different CORESETs based on their QCL-Type-D properties. Not all CORESETs are treated equally; instead, the UE identifies the highest priority CORESET locally within the set of overlapping CORESETs and focuses decoding resources there, improving decoding efficiency while maintaining adequate reception completeness through the priority-based selection.
Data Source
AI summary
A method for wireless communication by a user equipment (UE) includes receiving a message indicating a plurality of CORESETs, each of the plurality of CORESETs is associated with a respective PDCCH monitoring occasion of a plurality of overlapping PDCCH monitoring occasions. The method also includes receiving, on one or more component carriers in a same band, a plurality of simultaneous beams comprising a plurality of PDCCH candidates. The method further includes monitoring a set of PDCCH candidates, of the plurality of PDCCH candidates, that correspond to: a first CORESET associated with a first QCL-Type-D property, a second CORESET associated with a second QCL-Type-D property, and a set of monitoring CORESETs, wherein each of the set of monitoring CORESETs is associated with the first QCL-Type-D property or the second QCL-Type-D property, and wherein the first CORESET is prioritized based on a search space set index and a serving cell index.