Terminal PUCCH TCI State Configuration for Uplink Reliability
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Solution Overview
Problem
Current radio communication systems, particularly in next-generation mobile communication systems like NR, face challenges in configuring and managing default TCI states, spatial relations, and pathloss reference signals for terminals, leading to potential degradation in communication quality and throughput.
Innovation Solution
A terminal equipped with a receiving section to receive configuration information for a control resource set and a control section that determines the appropriate TCI states, spatial relations, and pathloss reference signals for repetition transmissions of the physical uplink control channel (PUCCH).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a terminal in next-generation mobile communication systems configures default TCI states, spatial relations, and pathloss reference signals for PUCCH repetition transmissions, then communication quality and throughput are improved, but device complexity and operational difficulty increase due to insufficiently studied configuration methods
Solution Approach 1:
The terminal autonomously determines the default TCI state, spatial relation, and pathloss reference signal by itself based on received configuration information, without requiring complex network-side configuration or coordination. The terminal uses its own judgment logic to select appropriate parameters from the received configuration, thereby improving communication quality while avoiding the complexity of external configuration management.
Solution Approach 2:
The terminal copies or reuses the configuration information received for the control resource set and applies it to determine the default TCI state, spatial relation, and pathloss reference signal for PUCCH repetition transmissions. This copying approach allows the terminal to leverage existing configuration data rather than requiring separate complex configuration procedures.
2Productivity
If a terminal applies default TCI state, spatial relation, and pathloss reference signal for PUCCH repetition transmissions, then throughput is improved, but operational difficulty increases due to unclear determination methods
Solution Approach 1:
The terminal independently determines the appropriate default TCI state, spatial relation, and pathloss reference signal using its own judgment logic based on the received configuration information. This self-service mechanism improves throughput by enabling clear operational procedures while maintaining ease of operation by avoiding complex external coordination.
Solution Approach 2:
The terminal receives and stores configuration information related to the control resource set in advance, which is then used to determine the default TCI state, spatial relation, and pathloss reference signal when needed for PUCCH repetition transmissions. This preliminary preparation simplifies the operational process by having configuration data ready before transmission occurs.
Data Source
AI summary
A terminal according to one aspect of the present disclosure includes a receiving section that receives configuration information related to a control resource set in a downlink bandwidth part, and a control section that determines, based on a plurality of transmission configuration indication (TCI) states corresponding to a specific control resource set based on the configuration information, at least one of a plurality of spatial relations and a plurality of pathloss reference signals to be applied to a plurality of repetition transmissions of a physical uplink control channel (PUCCH). According to one aspect of the present disclosure, it is possible to appropriately control operation related to a default TCI state/spatial relation/pathloss reference signal.