Uplink TCI-State Mapping for Accurate Power Control
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Solution Overview
Problem
In future radio communication systems like NR, the relationship between Transmission Configuration Indication (TCI) states and power control parameters is unclear, leading to potential deterioration of communication quality.
Innovation Solution
A terminal and base station are designed to control power control parameters based on associations between TCI states applied to multiple types of uplink signals, enabling appropriate power control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If TCI states are applied to multiple types of uplink signals, then the adaptability of the communication system is improved, but the clarity of the relationship between TCI state and power control parameter deteriorates
Solution Approach 1:
The patent segments the association information into two distinct parts: TCI state information and power control parameter information. The base station separately transmits these associations through different signaling mechanisms (RRC signaling for TCI state associations and MAC CE or RRC signaling for power control parameter associations), allowing each segment to be clearly defined and managed independently, thus resolving the information loss while maintaining adaptability.
Solution Approach 2:
The patent introduces an intermediary association relationship that links TCI states to power control parameters through a base station-configured mapping. This intermediary structure (the association information configured by the base station) acts as a mediator that clearly defines how specific TCI states correspond to specific power control parameters, eliminating ambiguity while allowing flexible application across multiple uplink signal types.
2Device complexity
If the relationship between TCI state and power control parameter is not clear, then the device complexity is reduced, but the communication quality deteriorates
Solution Approach 1:
The base station performs preliminary configuration by pre-establishing the association between TCI states and power control parameters before actual uplink transmission occurs. Through advance signaling (RRC or MAC CE), the terminal receives and stores the mapping relationships, so that during actual transmission, the terminal can directly apply the pre-defined associations without real-time calculation or ambiguity, ensuring communication quality while keeping the runtime complexity low.
3Reliability
If appropriate power control is implemented, then the communication quality is improved, but the device complexity increases
Solution Approach 1:
The terminal is configured to autonomously determine and apply the appropriate power control parameters based on the received TCI state associations. Once the base station provides the association information, the terminal independently performs the power control parameter selection and application without requiring continuous base station intervention or complex coordination protocols, thereby improving communication quality while limiting the increase in overall system complexity.
Data Source
AI summary
A terminal according to an aspect of the present disclosure includes: a receiving section that receives information related to an association between a transmission configuration indication (TCI) state applied to a plurality of types of uplink signals and one or more power control parameters applied to one type of uplink signal among the plurality of types of uplink signals; and a control section that controls transmission of the one type of uplink signal based on the information. According to one aspect of the present disclosure, the power control parameter can be appropriately controlled.