Terminal TCI State Determination for Uplink Control
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Solution Overview
Problem
In future radio communication systems, the indefinite method of transmission configuration indication (TCI) state leads to degradation in communication quality and reduced throughput, as the current methods are unclear and inconsistent.
Innovation Solution
A terminal equipped with a receiving section for downlink control information and a control section that determines the number of TCI states for uplink channels based on higher layer signaling and specific DCI, ensuring clear TCI state indication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a TCI state indication method is indefinite or unclear, then the system maintains flexibility in signal configuration, but communication quality degrades and throughput reduces
Solution Approach 1:
The patent changes the parameter of TCI state indication from indefinite to definite by establishing clear rules for determining the number of TCI states. The terminal determines the number of TCI states to be applied to UL channels based on specific DCI fields and higher layer signaling configurations, transforming the ambiguous indication process into a deterministic parameter setting procedure.
Solution Approach 2:
The patent segments the TCI state indication process into distinct components: DL channel TCI states, UL channel TCI states, and specific DCI fields. By dividing the overall TCI state management into separate controllable segments, the system achieves clear indication methods for different channel types while maintaining overall system flexibility.
2Ease of operation
If multiple TCI states are indicated for UL channels without clear determination rules, then the system supports flexible multi-beam operation, but the terminal cannot properly determine which TCI states to apply
Solution Approach 1:
The patent implements feedback mechanisms where the terminal reports its capability regarding the number of UL TCI states it can handle, and the network configures appropriate higher layer parameters based on this feedback. This feedback loop enables the system to adapt the TCI state indication method to terminal capabilities while maintaining ease of operation.
Solution Approach 2:
The patent introduces dynamic determination of TCI state numbers based on specific DCI fields. The number of TCI states applied to UL channels is not fixed but dynamically determined according to DCI format and field configurations, allowing the system to adapt between single-beam and multi-beam operations as needed.
3Productivity
If the TCI state indication method is not standardized, then the system can accommodate various implementation approaches, but throughput is reduced due to inconsistent processing
Solution Approach 1:
The patent creates a universal TCI state indication framework that works across different DCI formats and channel types. The same basic principle of determining TCI state numbers from DCI fields and higher layer parameters applies universally to DL and UL channels, ensuring consistent processing and maximizing throughput across diverse scenarios.
Data Source
AI summary
A terminal according to one aspect of the present disclosure includes a receiving section that receives downlink control information (DCI) for indicating a transmission configuration indication (TCI) state applicable to a plurality of signals, and a control section that, when the number of TCI states indicated for an uplink (UL) channel included in the plurality of signals is more than one, determines the number of TCI states to be applied to the UL channel, based on at least one of higher layer signaling and specific DCI. According to one aspect of the present disclosure, it is possible to appropriately perform TCI state indication.