TCI State Management for Inter-Cell Mobility
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face limitations in communication flexibility and efficiency, particularly in managing beams for inter-cell mobility, which affects the performance of user equipment (UE) and base stations in handling multiple beams and reporting configurations.
Innovation Solution
The implementation of a system where user equipment (UE) and base stations exchange and manage lists of Transmission Configuration Indicator (TCI) states for beams through radio resource control (RRC) messages and media access control (MAC) Control Elements, enabling enhanced multi-beam measurement and reporting capabilities for inter-cell mobility and multiple Transmission Reception Points (mTRP), with specific configurations for CSI reporting and beam indication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the system uses a single list of TCI states for all cells, then the device complexity is reduced, but the adaptability for inter-cell mobility is insufficient
Solution Approach 1:
The patent divides the TCI state management into separate lists: one list for serving cell beams and another list for non-serving cell beams. This segmentation allows the system to independently manage beam configurations for different cell types, thereby improving adaptability for inter-cell mobility while keeping each list's management relatively simple.
Solution Approach 2:
The patent introduces a new dimension of differentiation by creating separate TCI state lists based on cell serving status (serving vs. non-serving). This dimensional separation enables more flexible beam management for inter-cell mobility scenarios without significantly increasing overall system complexity.
2Manufacturing precision
If the system manages separate TCI state lists for serving and non-serving cells, then the beam management precision is improved, but the device complexity increases
Solution Approach 1:
By segmenting TCI states into separate lists for serving and non-serving cells, the system achieves more precise beam configuration control. Each list can be independently optimized and managed, improving beam management precision while the modular structure helps control complexity.
Solution Approach 2:
The patent applies local quality by allowing different TCI state configurations and management strategies for different cell types. Serving cells can use one set of beam management rules while non-serving cells use another, enabling precise local optimization without requiring complete system redesign.
3Measurement precision
If the system uses detailed beam reporting configurations, then the measurement precision is improved, but the loss of time for reporting increases
Solution Approach 1:
The patent implements partial action by allowing the network to configure specific reporting subsets for different cell types. Instead of requiring comprehensive reporting for all cells, the system can selectively report beams based on their importance and current usage, achieving sufficient measurement precision while reducing overall reporting time.
Data Source
AI summary
A user equipment (UE) that communicates with a base station apparatus is described. The UE may include receiving circuitry configured to receive a radio resource control (RRC) message comprising first information used for indicating a first list of Transmission Configuration Indicator (TCI) state(s) for beam(s) associated with non-serving cell(s), and receive an RRC message comprising second information used for indicating a second list of Transmission Configuration Indicator (TCI) state(s) for beam(s) associated with serving cell(s), and receive a first media access control (MAC) Control Element (CE) message comprising third information used for indicating a first TCI state for physical downlink control channel (PDCCH) from the first list. Further, the receiving circuitry may also be configured to receive a second media access control (MAC) Control Element (CE) message comprising fourth information used for indicating a second TCI state for physical downlink control channel (PDCCH) from the second list.