Multi-Carrier TCI Coordination for Low-Latency BWP Switching
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing transmission configuration indicators (TCI) and bandwidth part switching across multiple component carriers (CCs), particularly when CCs have different TCI configuration modes, leading to overhead and latency issues.
Innovation Solution
Implementing a common TCI ID indication and simultaneous BWP switching for multiple CCs, allowing for unified beam management across CCs with different configuration modes, and reducing activation overhead and latency through coordinated TCI state updates and BWP transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate TCI configuration modes are used for different component carriers, then each CC can be optimized for its specific requirements, but the overhead and complexity of managing multiple configurations increases
Solution Approach 1:
The patent applies universality by introducing a unified TCI state indication mechanism that can serve multiple component carriers simultaneously. The base station configures a shared TCI state pool that can be dynamically assigned to different CCs, allowing a single configuration structure to handle diverse TCI requirements across multiple carriers without requiring separate management procedures for each CC.
Solution Approach 2:
The patent merges the TCI configuration management of multiple component carriers into a unified process. By combining the TCI state indications and associations across CCs into a single coordinated mechanism, the system reduces the number of separate configuration operations needed while maintaining the ability to differentiate TCI settings when required by specific carrier characteristics.
2Measurement precision
If TCI states are updated individually for each component carrier, then precise beam control is maintained, but the latency and activation overhead increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring a pool of TCI states at the base station before they are needed for actual beam management. These pre-configured TCI states are stored and ready for rapid activation. When beam updates are required, the system can quickly activate pre-prepared TCI states from the pool without undergoing lengthy configuration procedures, thereby reducing activation latency while maintaining precise beam control through the use of appropriately selected pre-configured states.
3Adaptability or versatility
If multiple TCI configurations are maintained for different CCs, then specific beam requirements are met, but the signaling overhead increases
Solution Approach 1:
The patent applies copying by creating a shared TCI state pool that can be referenced by multiple component carriers. Instead of maintaining separate complete TCI configurations for each CC, the system creates a master pool of TCI states that can be copied or referenced by different CCs as needed. This reduces signaling overhead because the same TCI state definitions can serve multiple carriers, and updates to the shared pool automatically benefit all referencing CCs without requiring redundant signaling.
Data Source
AI summary
A user equipment (UE) includes a transceiver and a processor. The processor is configured to receive, via the transceiver, a common transmission configuration indicator (TCI) identifier (ID) indication for a set of target component carriers (CCs) within a set of multiple CCs; identify, within the set of multiple CCs, the set of target CCs to which the common TCI ID indication applies; and activate, for each CC in the set of target CCs and in accord with the common TCI ID indication, a respective TCI state in at least one TCI state list.