Terminal TCI State Selection for Downlink Signal Scheduling
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Solution Overview
Problem
The application of Transmission Configuration Indication (TCI) states in future radio communication systems is not clear, leading to potential degradation in communication quality and throughput reduction.
Innovation Solution
A terminal and base station that determine TCI states based on frequency range, specific capabilities, and threshold offsets from downlink control information reception to appropriately apply TCI states to downlink signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a TCI state is applied to multiple types of signals (channels/RSs) to improve system efficiency, then communication throughput is improved, but communication quality may degrade due to unclear indication and application methods
Solution Approach 1:
The patent applies different TCI state indication and application methods to different types of signals and channels based on their specific characteristics. For example, different procedures are defined for PDSCH, PDCCH, CSI-RS, and other downlink signals, ensuring each signal type receives the appropriate level of TCI state management to maintain both quality and throughput
Solution Approach 2:
The patent introduces dynamic TCI state indication mechanisms where the number and type of TCI states applied to signals can be flexibly configured based on signal characteristics, frequency range, and deployment scenarios. This allows the system to adaptively optimize the balance between communication quality and throughput for different operating conditions
2Reliability
If clear TCI state indication methods are established for all signal types to improve communication quality, then system complexity increases due to the need for multiple indication procedures
Solution Approach 1:
The patent segments the TCI state indication and application process into distinct procedures for different signal types and scenarios. Each segment handles specific signal types (PDSCH, PDCCH, CSI-RS, etc.) with tailored indication methods, making the overall complex system manageable through modular, organized procedures that can be independently implemented and maintained
Data Source
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AI summary
A terminal according to one aspect of the present disclosure includes: a receiving section that receives downlink control information (DCI) for scheduling a specific downlink (DL) signal; and a control section that determines one or a plurality of unified Transmission Configuration Indication (TCI) states to be applied to the DL signal, based on at least one of a frequency range (FR), supporting of a specific capability, and a specific threshold related to an offset from reception of the DCI to reception of the down DL signal. According to one aspect of the present disclosure, it is possible to appropriately apply a TCI state(s).