RRC Reconfiguration Cell Activation Control
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Solution Overview
Problem
In multi-flow transmission scenarios of 3GPP WCDMA systems, there is a need for an effective method to control the activated or deactivated state of cells participating in data transmission to optimize performance during RRC signaling reconfiguration, as existing methods lack clear guidance on managing cell activation and deactivation.
Innovation Solution
A method where a base station and terminal receive RRC reconfiguration messages, using identification information to determine whether secondary cells should be kept activated or deactivated, ensuring optimal configuration based on previous participation in multi-flow transmission, thereby implementing activation control during RRC signaling reconfiguration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If RRC reconfiguration message is used to change serving cell, then cell reconfiguration is achieved, but cell activation state management becomes unclear and complex
Solution Approach 1:
The patent segments the cell state management by introducing a dedicated field in the RRC reconfiguration message that separately indicates the activation state (activated or deactivated) for each secondary cell. This segmentation allows the network to independently control the activation state of each cell without affecting other cells, thereby reducing the overall management complexity while maintaining reconfiguration flexibility.
Solution Approach 2:
The patent applies preliminary action by pre-configuring the activation state indication in the RRC reconfiguration message before the cell reconfiguration takes effect. The UE can prepare the cell activation/deactivation status in advance based on the received indication, ensuring seamless transition and avoiding complex post-reconfiguration state management.
2Productivity
If multiple cells are activated for multi-flow transmission, then throughput is improved, but control complexity increases
Solution Approach 1:
The patent implements dynamic cell activation control by allowing the network to flexibly indicate which secondary cells should be activated or deactivated through the RRC reconfiguration message. This dynamic control mechanism enables the system to adapt the number of active cells based on traffic conditions and channel quality, optimizing throughput while maintaining manageable control complexity through standardized signaling.
3Loss of information
If cell activation state is not explicitly managed, then signaling overhead is reduced, but transmission performance deteriorates
Solution Approach 1:
The patent merges the cell activation state indication with the existing RRC reconfiguration message structure. By combining the cell reconfiguration information and activation state indication into a single standardized message, the patent avoids additional separate signaling overhead while ensuring precise control over cell activation states, thereby maintaining transmission performance without excessive signaling.
Data Source
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AI summary
Embodiments of the present invention provide a method for controlling cell activation, a base station, and a terminal. The method for controlling cell activation includes: receiving, by a base station, a radio resource control RRC reconfiguration message, where the RRC reconfiguration message carries cell identification information of multiple cells; and, if the base station determines and learns, according to the cell identification information of the multiple cells, that a first cell served by the base station among the multiple cells is a secondary cell or a secondary assisted cell and is a cell that participates in multi-flow transmission before the base station receives the RRC reconfiguration message, keeping a cell state of the first cell unchanged. According to the method for controlling cell activation, the base station, and the terminal that are provided in the embodiments of the present invention, through determination on cell identification information in the RRC signaling reconfiguration message, a corresponding cell remembers a previous activated state, or activation processing is performed, thereby implementing in an MF-Tx scenario, optimized configuration of an activated or deactivated state of the cell that participates in the multi-flow transmission when reconfiguration is implemented through RRC signaling.