SCG Bandwidth Part Switching During 5G Activation Transitions
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Solution Overview
Problem
Existing communication technologies lack a scheme for handling bandwidth parts (BWPs) of the secondary cell group (SCG) during the SCG deactivated/activated state, affecting communication reliability between the terminal and the network side device.
Innovation Solution
A method and apparatus for processing BWPs in a terminal, including activating a first target BWP, keeping the SCG serving cell in a BWP, or switching BWPs when specific conditions are met, such as uplink data arrival or SCG activation commands, to ensure reliable communication when the SCG transitions from deactivated to activated states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the SCG is deactivated to save power, then power consumption is reduced, but communication reliability deteriorates when data transmission is needed
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple BWPs and pre-determining switching conditions before data transmission is needed. When the SCG is deactivated, the terminal pre-identifies which BWP should be activated upon SCG reactivation, and pre-prepares the switching mechanism. This ensures that when communication is needed, the terminal can quickly switch to the appropriate BWP without delay, maintaining communication reliability while keeping the SCG deactivated for power savings during low-activity periods.
2Speed
If the SCG is quickly reactivated when data is needed, then communication speed is improved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by implementing a dynamic BWP switching mechanism that adapts to real-time communication needs. The terminal continuously monitors data arrival conditions and SCG state, dynamically switching between different BWPs based on current requirements. When the SCG is deactivated, the terminal dynamically determines the optimal BWP to activate upon reactivation, allowing quick restoration of communication speed while minimizing power consumption by keeping the SCG deactivated during low-activity periods rather than maintaining continuous high-speed operation.
3Adaptability or versatility
If the terminal maintains multiple BWP configurations, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the BWP management into distinct, independent configurations. Each BWP is configured as a separate entity with specific parameters and activation conditions, allowing the terminal to manage multiple BWPs independently. This segmentation enables the terminal to activate only the necessary BWP configurations based on current communication needs, maintaining high adaptability while reducing complexity by avoiding the need to manage a single monolithic configuration that must handle all scenarios.
Data Source
AI summary
A method for processing BWPs includes: executing, by a terminal, a first operation, when satisfying a first condition including at least one of: there is uplink data arriving at a SCG in a deactivated state; the terminal receives an SCG activation command; the terminal requests to activate the SCG; the SCG is activated; the terminal receives a BWP activation command; or in conversion process of the SCG from the deactivated state to an activated state, the first operation includes: activating a first target BWP of a first serving cell of the SCG; keeping the first serving cell of the SCG working in a first BWP; and executing BWP switching from the first BWP to the first target BWP for the first serving cell of the SCG, the first BWP being a BWP which the first serving cell works in or activates when the SCG is in the deactivated state.