PUCCH Spatial Relation Selection Using CORESET QCL Parameters
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Solution Overview
Problem
In future radio communication systems, the information relating to quasi-co-location (QCL) is often unclear, leading to deteriorated communication quality and reduced throughput.
Innovation Solution
A terminal and base station that receive and process quasi-co-location (QCL) parameters, using them to determine appropriate spatial relations for physical uplink control channels and control resource sets under specific conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple QCL parameters are provided for a control resource set, then the adaptability and accuracy of spatial relation determination are improved, but the device complexity and difficulty of information processing increase
Solution Approach 1:
The patent segments the QCL parameter selection process into distinct cases based on PUCCH spatial relation configuration status. The terminal first checks whether PUCCH spatial relation is configured, then selectively applies different QCL parameter selection rules. This segmentation simplifies the decision logic and reduces processing complexity while maintaining accurate QCL determination.
Solution Approach 2:
The patent establishes preliminary selection criteria for QCL parameters before actual transmission occurs. By pre-defining which QCL parameters to select based on the configuration state (configured or not configured PUCCH spatial relation), the terminal avoids complex real-time calculations and makes efficient parameter selection in advance.
2Reliability
If QCL information is not clearly defined, then the system maintains simplicity and ease of operation, but communication quality and throughput deteriorate
Solution Approach 1:
The patent enables the terminal to autonomously determine appropriate QCL parameters based on its own configuration state without requiring additional complex network configuration. The terminal self-evaluates whether PUCCH spatial relation is configured and independently selects the correct QCL parameters from the available set, improving reliability while maintaining operational simplicity.
Solution Approach 2:
The patent implements dynamic QCL parameter selection that adapts to the terminal's configuration state. The selection of QCL parameters changes dynamically based on whether PUCCH spatial relation is configured or not, allowing the system to optimize communication quality for different operational scenarios without increasing overall system complexity.
Data Source
AI summary
A terminal according to one aspect of the present disclosure includes a receiving section that receives a plurality of quasi-co-location (QCL) parameters with respect to a control resource set (CORESET), and a control section that uses, in a case where at least one of a physical uplink control channel (PUCCH) and the CORESET satisfies a condition, at least one of the plurality of QCL parameters, in at least one spatial relation of the PUCCH. The one aspect of the present disclosure enables appropriately determining information relating to QCL.