SCG Activation Control for Energy-Aware MR-DC Connectivity
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Solution Overview
Problem
The 3GPP 5G system lacks specific mechanisms for efficient SCG deactivation and activation in a multi-radio dual connectivity (MR-DC) scenario, particularly in Next Generation Radio Access Network (NG-RAN) environments, where user equipment (UE) with multiple transceivers utilize resources from both NR and E-UTRA nodes.
Innovation Solution
Implement methods and apparatuses for SCG deactivation and activation procedures, initiated by UE, MN, or SN, based on user data volume, inactivity, or link failures, using indicators and timers to manage SCG states efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If SCG remains continuously activated to ensure rapid data transmission, then data transmission speed is improved, but energy consumption increases
Solution Approach 1:
The SCG is dynamically activated or deactivated based on real-time data transmission conditions. When data transmission is detected, the SCG is activated to enable rapid transmission. When no data is transmitted for a predetermined time period, the SCG is deactivated to save energy. This dynamic state adjustment resolves the contradiction between maintaining fast transmission speed and reducing energy consumption.
Solution Approach 2:
The system periodically monitors data transmission activity and alternates between SCG activation and deactivation states. By using periodic monitoring with a predetermined time threshold, the system ensures the SCG is active only when needed for data transmission, thereby maintaining transmission speed capability while minimizing energy consumption during idle periods.
2Use of energy by moving object
If SCG is deactivated to save energy, then energy consumption is reduced, but activation delay occurs when data transmission is needed
Solution Approach 1:
The system performs preliminary monitoring of data transmission conditions and maintains the SCG in an activated state when data transmission is detected or expected. By proactively keeping the SCG active based on detected data presence, the system avoids activation delays while still allowing deactivation during confirmed idle periods to save energy.
3Reliability
If multiple transceivers are continuously active in MR-DC operation, then communication reliability is improved, but device complexity increases
Solution Approach 1:
The system extracts or isolates the SCG functionality from continuous operation, selectively activating only when data transmission is detected. This allows the system to maintain the capability for reliable multi-transceiver communication when needed, while simplifying the operational state to single-transceiver mode during idle periods, thereby reducing effective device complexity without compromising communication reliability.
Data Source
AI summary
The present application relate to methods and apparatuses for a secondary cell group (SCG) deactivation mechanism and a SCG activation mechanism in a multi-radio dual connectivity (MR-DC) scenario under a 3rd Generation Partnership Project (3GPP) 5G New Radio (NR) system or the like. According to an embodiment of the present application, a method can include: in response to detecting user data volume decrease or user data inactivity at a SCG, deciding to deactivate the SCG; and in response to deciding to deactivate the SCG, performing a SCG deactivation procedure.