Bearer Reconfiguration for Uplink Transfer During SCG Dormancy
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Solution Overview
Problem
When a Secondary Cell Group (SCG) or Primary SCG Cell (PSCell) enters a suspend or dormant state, the network struggles to ensure normal uplink data transmission for User Equipment (UE) due to the inability of the Secondary Node (SN) to perform data scheduling.
Innovation Solution
The network modifies the configuration of the bearer via signaling to enable uplink data transmission on the Master Cell Group (MCG) by reconfiguring or releasing SCG RLC bearers, deactivating duplication transmission functions, setting the primary path to MCG, and adjusting the uplink data split threshold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the SCG or PSCell is configured in a suspend or dormant state to save power consumption, then power consumption of the UE is reduced, but the ability to perform uplink data transmission is compromised
Solution Approach 1:
The patent segments the bearer transmission paths into MCG path and SCG path, allowing independent control of each path. When SCG enters suspend/dormant state, the MCG path remains active for uplink transmission, while SCG resources are released or deactivated. This segmentation enables the system to maintain essential uplink capabilities through MCG while reducing power consumption by deactivating SCG monitoring and transmission.
Solution Approach 2:
The patent changes the operational parameters of the bearer configuration based on SCG state. When SCG is in suspend/dormant state, the system modifies bearer parameters such as deactivating duplication transmission, adjusting data split thresholds, and reconfiguring RLC bearers to route uplink traffic through MCG. These parameter changes enable adaptive power saving while maintaining transmission capability.
2Use of energy by moving object
If the SCG or PSCell is configured in a suspend or dormant state to reduce power consumption, then power consumption of the UE is reduced, but the complexity of bearer configuration management increases
Solution Approach 1:
The patent implements dynamic bearer configuration that automatically adapts to SCG state changes. The system dynamically adjusts bearer parameters (duplication activation, data split thresholds, RLC bearer configuration) based on whether SCG is active, suspended, or dormant. This dynamic approach reduces manual configuration complexity while enabling flexible power management across different operational states.
Solution Approach 2:
The system employs feedback mechanisms where the network device receives notifications about SCG state changes from the UE and automatically triggers appropriate bearer reconfiguration actions. This feedback loop automates the management complexity, reducing the burden on both network and UE to manually manage bearer configurations during state transitions.
3Reliability
If the network configures split bearer with duplication transmission to ensure reliable data transmission, then transmission reliability is improved, but when SCG is in suspend/dormant state, the system cannot determine the appropriate transmission path
Solution Approach 1:
The patent applies preliminary action by pre-configuring the MCG as the primary transmission path and establishing default bearer routes before SCG enters suspend/dormant state. When state changes occur, the system has already prepared the MCG path for immediate use, eliminating the need for complex real-time path determination during state transitions. This preliminary setup ensures continuous transmission capability.
Solution Approach 2:
The network device acts as an intermediary that manages the complexity of path determination. Rather than requiring the UE to independently determine transmission paths during SCG state transitions, the network device receives state notifications and automatically adjusts bearer configurations to route traffic appropriately through MCG or SCG, simplifying the UE's operation while maintaining reliability.
Data Source
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AI summary
A processing method of configuration information of bearer, a network device and a terminal are provided in the present disclosure. The method of configuration information of bearer applied to a network device includes the following steps: when a Secondary Cell Group (SCG) or a Primary SCG Cell (PSCell) enters into a suspend state or a dormant state, modifying, by the network device, configuration information of a bearer via a signaling, to enable a configured uplink bearer to transmit on a Master Cell Group (MCG).