Terminal Apparatus SCG Deactivation for 5G Power Reduction
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Solution Overview
Problem
In dual connectivity technology for 5G NR, terminal apparatuses consume excessive power by continuously monitoring multiple cell groups for efficient data communication, leading to high power consumption and potential delays.
Innovation Solution
A method and apparatus that allow the terminal apparatus to deactivate secondary cell groups (SCGs) upon receiving signaling from the base station, with the option to configure the Beam Failure Indication Counter (BFI_COUNTER) to 0 if beam failure detection is not required in the deactivated state, optimizing power usage and communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the terminal apparatus continuously monitors multiple cell groups to enable data communication with large capacity, then the communication capacity is improved, but the power consumption increases
Solution Approach 1:
The patent implements dynamic monitoring of cell groups by transitioning between active and deactivated states based on data transmission requirements. The terminal apparatus monitors cell groups only when data is to be transmitted or received, and deactivates monitoring when no data transmission is required, thereby adapting the monitoring behavior to actual communication needs and reducing unnecessary power consumption.
Solution Approach 2:
The patent employs periodic activation and deactivation of cell group monitoring based on scheduled data transmission requirements. Instead of continuous monitoring, the terminal apparatus activates monitoring periodically when data communication is needed and deactivates it during periods without data transmission, transforming continuous action into periodic action to conserve energy.
2Use of energy by moving object
If the terminal apparatus deactivates the SCG to reduce power consumption, then the power consumption is reduced, but the beam failure detection capability may be affected
Solution Approach 1:
The patent applies different quality states to different cell groups based on their functional requirements. The PCell maintains constant activation with full monitoring capabilities to ensure reliable control plane communication, while the SCG is dynamically deactivated to save power during periods without data transmission. This local differentiation allows the system to optimize power consumption without compromising the reliability of critical functions.
Solution Approach 2:
The patent changes the operational parameters of the SCG by transitioning between active and deactivated states based on data transmission requirements. When data transmission is not required, the SCG is deactivated to reduce power consumption; when data transmission is required, the SCG is activated to restore full functionality including beam failure detection capability.
Data Source
AI summary
A processing unit of a terminal apparatus communicates with a base station apparatus using an MCG and an SCG, determines whether signalling notifying that the SCG is to be in a deactivated state and transmitted from the base station includes information indicating that beam failure detection is to be performed, and in a case of determining that the signalling includes no information indicating that the beam failure detection is to be performed in the deactivated state of the SCG, the processing unit configures BFI_COUNTER of a PSCell of the deactivated SCG to 0.