Unified TCI State Selection for Multi-TRP Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing transmission control indication (TCI) states for multi-transmission-reception-point (TRP) operation, leading to increased signaling overhead and complexity.
Innovation Solution
The proposed solution involves a method where a user equipment (UE) receives configuration messages from a cellular network to select unified TCI states for downlink communication. This includes receiving lists of TCI states, determining the number of TCI states based on TCI codepoints, and selecting a subset of TCI states for communication with multiple TRPs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple separate TCI state lists are maintained for different TRPs, then the system can support multi-TRP operation with specific TCI states for each TRP, but the signaling overhead and system complexity increase
Solution Approach 1:
The patent combines multiple separate TCI state lists for different TRPs into a single unified TCI state list. The network configures one list containing TCI states for multiple TRPs, and the UE selects TCI states from this unified list based on TCI codepoints indicated in downlink control information. This merging approach maintains multi-TRP operation capability while significantly reducing the complexity of managing and signaling multiple separate TCI state lists.
2Reliability
If separate TCI state configurations are used for each TRP, then precise control over transmission states for each TRP is achieved, but the signaling overhead increases
Solution Approach 1:
The patent creates a universal TCI state list that serves multiple TRPs simultaneously. Each TCI state in the unified list is associated with a specific TRP through TRP-specific indication mechanisms, allowing a single list structure to fulfill the function of multiple separate lists. The network can indicate which TCI state to use for which TRP using compact TCI codepoints in downlink control information, thereby maintaining precise transmission control while reducing signaling overhead compared to separate configurations for each TRP.
Data Source
AI summary
This disclosure relates to techniques for performing multi-transmission and reception point operation in a wireless communication system. A plurality of transmission control indication states may be indicated for future use, e.g., using one or more paired lists. A subset of the indicated states may be activated. One or more states of the subset may be used for performing multi-transmission and reception point operation in a single downlink control information mode.