TCI State Timing for Dynamic Multi-TRP Channel Switching
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Solution Overview
Problem
In communication systems using frequency range 2, the dynamic switching between multiple transmission reception points (TRPs) requires accurate determination of the application time for transmission configuration indication (TCI) states to ensure consistent TCI state usage between the terminal and network device, as inconsistent application times can affect transmission performance.
Innovation Solution
A method for determining the application time of TCI states by receiving first and second indication information, allowing the terminal and network device to synchronize their understanding of when to apply the TCI states, using designated rules or protocols to ensure timely application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If independent additional signaling is added to indicate TCI states for dynamic TRP switching, then the ability to dynamically switch between multiple TRPs is improved, but the complexity of determining application time increases
Solution Approach 1:
The patent introduces an intermediary mechanism (additional signaling) that mediates between the network device and terminal to indicate TCI states. This intermediary signaling resolves the contradiction by providing a structured way to convey multiple TCI state information while establishing clear rules for application time determination, thus managing the complexity introduced by dynamic TRP switching.
Solution Approach 2:
The patent implements dynamic TCI state indication where the terminal can switch between different TRPs based on indicated TCI states. The application time determination rules allow the system to dynamically adapt the switching behavior while maintaining synchronized understanding between network device and terminal, resolving the complexity through structured dynamic behavior.
2Reliability
If multiple sets of TCI states are configured for multi-TRP channels, then transmission performance is improved, but the difficulty of synchronizing application time between terminal and network device increases
Solution Approach 1:
The patent establishes feedback mechanisms through standardized application time determination rules that ensure both terminal and network device arrive at the same conclusion regarding when to apply indicated TCI states. This feedback alignment resolves the synchronization difficulty by creating a deterministic relationship between signaling reception and state application timing.
Solution Approach 2:
The patent applies preliminary action by pre-defining application time determination rules before actual TCI state indication occurs. These predetermined rules (such as applying TCI states at specific slot offsets or based on scheduling timing) allow both terminal and network device to independently determine the same application time without real-time negotiation, thus resolving the synchronization difficulty.
Data Source
AI summary
A method for determining application time of a transmission configuration indication (TCI) state is executed by a terminal. The method includes: receiving first indication information used for indicating at least one first TCI state and/or at least one pair of first TCI states, receiving second indication information used for indicating a second TCI state used when transmitting a specified channel and/or a specified signal, and determining application time of the second TCI state.