Uplink Signal Transmission via TCI State Panel Configuration
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Solution Overview
Problem
Current mobile communication systems face challenges in efficiently handling explosively increasing data traffic, requiring advanced technologies to support higher data rates, numerous connected devices, low latency, and high-energy efficiency, particularly in uplink signal transmission.
Innovation Solution
A method for transmitting uplink signals in wireless communication systems that utilizes a Transmission Configuration Indicator (TCI) state, including panel ID, reference RS, and type of uplink signal, allowing for flexible operation based on UE capability, and adaptive resource allocation to optimize beam management and reduce signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple panels are supported for uplink transmission, then transmission reliability and beam management capability are improved, but device complexity and configuration overhead increase
Solution Approach 1:
The patent combines multiple panel configurations into a unified TCI state structure that can indicate spatial domain filters for different panels. The TCI state includes a panel ID field and spatial domain filter fields that can be configured together, allowing the UE to determine which panel and beam to use without requiring separate complex configuration for each panel. This merging approach maintains multi-panel support while reducing configuration overhead.
Solution Approach 2:
The TCI state is designed as a universal indicator that can apply to different uplink channels (PUCCH, PUSCH, SRS) and different panels through a single configuration structure. The same TCI state mechanism works across multiple scenarios, eliminating the need for separate panel-specific configuration procedures and reducing overall system complexity.
2Measurement precision
If TCI state includes detailed panel ID and reference RS configuration, then beam management precision is improved, but signaling overhead increases
Solution Approach 1:
The TCI state includes panel ID and spatial domain filter configurations only when necessary. The patent allows flexible configuration where the panel ID may be omitted if the UE can determine the panel based on other parameters, and the spatial domain filter may be partially configured with references to previously defined filters. This partial action approach provides sufficient beam management precision while reducing signaling overhead by including only essential information.
Solution Approach 2:
The patent uses reference RS (Reference Signal) mechanisms where instead of fully configuring all spatial domain filter parameters, the system references to previously defined RS configurations. The TCI state can indicate a reference to an existing spatial domain filter configuration, copying the necessary beam information without repeating the full configuration data, thus reducing signaling overhead while maintaining precision.
3Adaptability or versatility
If UE determines specific panel and spatial domain filter based on TCI state, then transmission flexibility and adaptability are improved, but processing time and latency increase
Solution Approach 1:
The patent pre-configures multiple TCI states with different panel and spatial domain filter combinations before actual transmission occurs. The UE receives configuration information containing multiple TCI states in advance, and during transmission, it simply needs to select the appropriate pre-configured TCI state based on current conditions, rather than determining panel and beam parameters in real-time. This preliminary action significantly reduces processing latency while maintaining transmission flexibility.
Solution Approach 2:
The patent extracts the panel determination function from the TCI state configuration itself and places it in separate higher-layer configuration or UE capability information. The TCI state focuses only on the spatial domain filter (beam) information, while the panel ID is obtained from separate sources. This extraction separates the beam selection (fast) from the panel identification (can be pre-determined), reducing the processing time required during transmission.
4Productivity
If integrated TCI state configuration is used for all uplink channels, then configuration efficiency is improved, but compatibility with existing schemes may be reduced
Solution Approach 1:
The patent designs the TCI state configuration to be dynamic and adaptable to different uplink channel types. The same basic TCI state structure can be configured for PUCCH, PUSCH, and SRS channels, but the specific fields and configurations can be activated or deactivated depending on the channel type and UE capability. This dynamic approach maintains compatibility with existing schemes for different channels while achieving integrated configuration efficiency.
Solution Approach 2:
The patent segments the TCI state configuration into optional fields and components that can be selectively applied. The panel ID field, spatial domain filter fields, and reference RS configurations are optional elements that can be included or excluded based on the specific uplink channel type and deployment scenario. This segmentation allows the integrated TCI state structure to be adapted to existing schemes for different channels without requiring complete redesign, thus maintaining compatibility while improving efficiency.
Data Source
AI summary
A method by which a terminal transmits an uplink signal in a wireless communication system, according to one embodiment of the present specification, comprises the steps of: receiving configuration information related to the transmission of the uplink signal; and transmitting the uplink signal on the basis of the configuration information. The configuration information includes a transmission configuration indicator state (TCI state). The uplink signal is transmitted on the basis of a specific panel and/or a specific spatial domain filter, according to the TCI state in which the panel ID and/or the reference RS is not configured.