CORESET TCI State Switching for Low-Latency Multi-TRP Beam Control
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Solution Overview
Problem
Existing common beam-based beam control techniques in multi-TRP communication systems experience delays due to beam conversion based on acknowledgment signals, which is inefficient and may lead to increased latency.
Innovation Solution
A method for controlling beams in a wireless communication system that supports both single-DCI and multiple-DCI techniques, enabling faster beam conversion or TRP conversion by updating TCI states based on DCI indications for DL and UL transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam conversion is performed based on acknowledgment signals in existing common beam-based beam control techniques, then beam control can be achieved, but latency increases and control efficiency decreases
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple TCI states for each CORESET before actual beam control operations. When DCI indicates a TCI state update, the UE can immediately switch beams without waiting for acknowledgment signals, as the target TCI state is already prepared and configured in advance. This eliminates the latency caused by waiting for ACK/NACK feedback in existing techniques.
Solution Approach 2:
The patent implements a feedback mechanism where the base station monitors beam control status and can trigger TCI state updates through DCI based on observed channel conditions or beam performance. This feedback loop allows the system to adaptively update beams without requiring explicit acknowledgment signals from the UE, reducing latency while maintaining reliable beam control.
2Speed
If multiple TCI states are configured per CORESET for faster beam switching, then beam control speed improves, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the beam control functionality into distinct components: CORESET-level TCI state configuration and DCI-level TCI state indication. Each CORESET can independently maintain its own set of configured TCI states, allowing the UE to manage multiple beams efficiently without overwhelming complexity. The DCI then selectively activates specific TCI states from the pre-configured set, simplifying the switching logic.
Solution Approach 2:
The patent uses parameter changes by allowing the number of TCI states per CORESET to be dynamically configurable through higher-layer parameters. The system can adjust the complexity level by configuring 1, 2, or more TCI states per CORESET based on service requirements, enabling a trade-off between beam switching speed and device complexity that adapts to different operational scenarios.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method performed by a terminal in a wireless communication system is provided. The method includes receiving, from a base station, downlink control information (DCI) associated with a control resource set (CORESET), the DCI indicating one or more transmission configuration indicator (TCT) states; updating at least one of a plurality of TCI states based on the one or more TCT states indicated by the DCI; and applying the one or more TCI states to at least one of a downlink reception or an uplink transmission associated with the CORESET.