TCI State Determination for Multi-TRP Wireless Nodes
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Solution Overview
Problem
In multi-antenna systems, particularly in Multi-Transmission Reception Point (Multi-TRP) and Multi-panel communications, determining the appropriate Transmission Configuration Indicator (TCI) state for control channels is challenging, affecting the robustness and efficiency of data channel scheduling.
Innovation Solution
A method that determines the TCI state based on whether the single-TRP or multi-TRP case applies, using a condition set to differentiate between TCI state sets, ensuring appropriate TCI state usage for enhanced reliability and transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a unified TCI state determination method is used for all search space sets, then the device complexity is reduced, but the adaptability to different transmission scenarios (single-TRP vs. multi-TRP) deteriorates
Solution Approach 1:
The patent implements dynamic TCI state determination by introducing a condition set that is evaluated based on the specific transmission scenario. The condition set checks whether control channel candidates from different search space sets are associated, and this dynamic evaluation allows the system to adapt between single-TRP and multi-TRP modes without requiring separate determination methods for each scenario, thus resolving the contradiction between unified complexity and scenario adaptability
2Reliability
If separate TCI state sets are maintained for different transmission scenarios, then the reliability of control channel transmission is improved, but the device complexity increases
Solution Approach 1:
The patent creates a universal TCI state determination mechanism that serves multiple transmission scenarios through a single unified condition set evaluation process. The condition set acts as a multi-functional gate that routes to appropriate TCI state sets based on the detected scenario characteristics, eliminating the need for separate management mechanisms while maintaining reliability for both single-TRP and multi-TRP transmissions
3Measurement precision
If the condition set evaluation is performed for every control channel candidate, then the precision of TCI state selection is improved, but the processing time increases
Solution Approach 1:
The patent performs preliminary evaluation of the condition set by checking associations between control channel candidates across search space sets before final TCI state assignment. This preliminary action identifies the transmission scenario type in advance, allowing the system to select the appropriate TCI state set without performing exhaustive evaluations for every individual control channel candidate, thus maintaining precision while reducing processing time
Data Source
AI summary
A first node receives a first information block; receives a first signaling; and receives a first signal. The first information block is used for indicating S search space sets; the first signaling comprises a first field, the first field in the first signaling indicating a TCI state of the first signal in a target TCI state set; the first signaling occupies a first control channel candidate, the first control channel candidate belonging to a first search space set, the first search space set being one of the S search space sets; a first condition set comprises that there exists a search space set other than the first search space set among the S search space sets that comprises one control channel candidate associated with the first control channel candidate; whether the first condition set is satisfied is used to determine the target TCI state set.