Terminal TCI State Determination for CORESET Configuration
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Solution Overview
Problem
The relationship between the unified Transmission Configuration Indication (TCI) state and the TCI state for a control resource set (CORESET) in next-generation mobile communication systems is indefinite, leading to potential degradation in communication quality and throughput.
Innovation Solution
A terminal that receives an indication of a TCI state to be applied to multiple types of channels and configuration information related to a CORESET or search space, and uses this information to determine the appropriate TCI state for a specific CORESET, excluding those configured by system information blocks or master information blocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a unified TCI state is applied to multiple types of channels/reference signals, then the system achieves higher capacity and simplified configuration, but the relationship between the unified TCI state and CORESET TCI state becomes indefinite, leading to communication quality degradation
Solution Approach 1:
The patent segments the TCI state determination process by distinguishing between different CORESET types (first CORESET configured via system information block/master information block, and second CORESET configured via RRC signaling). Different segmentation rules are applied to each type, ensuring reliable TCI state identification while maintaining unified TCI state benefits for other channels.
2Device complexity
If the relationship between unified TCI state and CORESET TCI state is left indefinite, then the system maintains flexibility and simplicity, but throughput reduction and communication quality degradation occur
Solution Approach 1:
The patent applies local quality by providing specific TCI state determination rules for different CORESET configurations. For the first CORESET (configured via system information block or master information block), the patent specifies that a default TCI state or predetermined TCI state should be used, while for the second CORESET (configured via RRC signaling), the patent allows flexible TCI state indication. This localized approach maintains simplicity where needed while ensuring throughput where required.
Data Source
AI summary
A terminal according to one aspect of the present disclosure includes a receiving section that receives an indication of a transmission configuration indication (TCI) state to be applied to a plurality of types of channels, and at least one of first configuration information related to a control resource set (CORESET) and second configuration information related to a search space, and a control section that judges, based on at least one of the first configuration information and the second configuration information, the TCI state to be applied to a specific CORESET related to terminal-specific and non-terminal-specific reception. The specific CORESET is a CORESET other than a CORESET configured by using a system information block or a master information block. According to one aspect of the present disclosure, it is possible to appropriately recognize a TCI state.