Configured Grant Spatial Relations for Accurate QCL Determination

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Solution Overview

Problem

In next-generation mobile communication systems like NR, determining quasi-co-location (QCL) parameters for configured grant configurations is unclear, leading to potential deterioration in communication throughput and quality.

Innovation Solution

A terminal and base station are designed to receive and manage multiple configured grant configurations, using spatial relations to appropriately determine QCL parameters for transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If multiple configured grant configurations are used to increase transmission capacity, then productivity is improved, but device complexity increases due to the need to manage multiple spatial relations

Engineering Contradiction:

Improvetransmission capacityVSAvoidspatial relation management

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent segments the spatial relation management by associating each configured grant configuration with a specific spatial relation index. This segmentation allows the terminal to independently manage spatial relations for each grant configuration, resolving the complexity issue while maintaining multiple active configurations for high productivity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies preliminary action by pre-configuring spatial relation indexes along with the configured grant parameters. This pre-association eliminates the need for dynamic spatial relation determination during transmission, simplifying real-time processing while supporting multiple grant configurations for enhanced capacity.

Inventive Principle:

Principle #10Preliminary action

2Adaptability or versatility

If spatial relations are not appropriately determined, then communication quality deteriorates, but the system gains flexibility in configuration management

Engineering Contradiction:

Improveconfiguration flexibilityVSAvoidcommunication quality

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies local quality by assigning specific spatial relation characteristics to each configured grant configuration based on its intended transmission purpose. This ensures that each configuration has the appropriate spatial properties for its function, maintaining communication quality while preserving configuration flexibility.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent implements feedback mechanisms where the terminal reports spatial relation determination results to the base station. This feedback loop ensures that spatial relations are appropriately determined for each configuration, maintaining reliability while allowing flexible configuration management.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12563544B2Terminal, radio communication method, and base station

Publication Date: 2026.02.24 NTT DOCOMO INC

AI summary

A terminal according to an aspect of the present disclosure includes: a receiving section that receives a plurality of configured grant configurations; and a control section that uses one or more spatial relations for transmission based on each of the plurality of configured grant configurations. According to an aspect of the present disclosure, it is possible to appropriately determine a QCL parameter used for a configured grant transmission.