TCI State Configuration for Accurate QCL Across Radio Channels
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Solution Overview
Problem
In future radio communication systems, the information related to quasi-co-location (QCL) is often indefinite, leading to potential communication quality reduction and throughput reduction.
Innovation Solution
A terminal and base station that receive configuration information for multiple TCI states and apply a specific TCI state to various channels, along with corresponding power control parameters, to appropriately determine QCL information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple TCI states are configured for different channel types, then QCL information determination accuracy is improved, but system complexity increases
Solution Approach 1:
The patent segments the QCL information configuration by channel type, creating separate TCI state configurations for downlink channels (PDSCH, PDCCH) and uplink channels (PUSCH, PUCCH, SRS). This segmentation allows precise QCL determination for each channel type while managing complexity through structured organization of configuration parameters.
Solution Approach 2:
The patent applies local quality by assigning specific QCL characteristics to different channel types based on their specific requirements. Downlink channels receive TCI states optimized for reception, while uplink channels receive TCI states optimized for transmission, ensuring each channel type gets the appropriate QCL information quality for its function.
2Measurement precision
If separate power control parameters are associated with each TCI state, then uplink power control accuracy is improved, but configuration overhead increases
Solution Approach 1:
The patent performs preliminary action by pre-configuring multiple TCI states with their associated power control parameters before actual uplink transmission. This allows the terminal to select the appropriate TCI state and its corresponding power control parameters based on the current channel conditions, achieving accurate power control without real-time calculation overhead.
Solution Approach 2:
The patent creates equipotentiality by establishing consistent relationships between TCI states and power control parameters across different uplink channel types. The same TCI state index refers to the same power control parameter set for PUSCH, PUCCH, and SRS, simplifying the configuration overhead while maintaining accurate power control through unified parameter management.
Data Source
AI summary
A terminal according to one aspect of the present disclosure includes a receiving section that receives configuration information indicating a plurality of transmission configuration indication (TCI) states applicable to multiple types of channels and that receives indication information indicating one TCI state out of the plurality of TCI states, and a control section that applies the one TCI state to the multiple types of channels and that applies, to an uplink channel out of the multiple types of channels, one power control parameter corresponding to the one TCI state out of a plurality of power control parameters, the plurality of power control parameters being associated with the plurality of respective TCI states. According to one aspect of the present disclosure, it is possible to appropriately determine information related to QCL.