SCG Deactivation Control for PSCell Random Access Behavior
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Solution Overview
Problem
The behavior of a terminal device in a deactivated Secondary Cell Group (SCG) is unknown, leading to uncertainty in SCG activation and potential power consumption issues due to frequent random access procedures.
Innovation Solution
The terminal device determines its behavior based on configuration information from a network device, including indication of the SCG's state and specific behaviors or procedures to perform after deactivation, such as random access to a Primary Secondary cell (PSCell).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device performs random access procedure frequently to ensure SCG activation, then the reliability of SCG activation is improved, but the power consumption increases
Solution Approach 1:
The network device performs preliminary actions by sending configuration information including first indication information and second indication information before the terminal device needs to activate SCG. The first indication information pre-defines the terminal device's behavior after SCG deactivation, while the second indication information pre-configures the PSCell's random access configuration. This preliminary configuration enables the terminal device to quickly determine whether to perform random access procedure without frequent signaling exchanges, thus ensuring reliable SCG activation while reducing power consumption.
2Reliability
If the terminal device determines behavior after SCG deactivation, then the activation of PSCell is guaranteed, but the device complexity increases
Solution Approach 1:
The invention changes the parameter representation by using indication information (first indication information and second indication information) to define terminal device behavior. Instead of complex behavior determination logic, the network device sends parameterized indication information that directly specifies whether the terminal device should perform random access procedure or remain in deactivated state. This parameterization simplifies the terminal device's behavior determination process while ensuring PSCell activation reliability.
Data Source
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AI summary
Provided in the embodiments of the present application are a method and apparatus for determining a behavior of a terminal device, and a terminal device and a network device. The method comprises: a terminal device receiving SCG configuration information sent by a network device, wherein the SCG configuration information comprises first indication information, and the first indication information is used to indicate whether the state of an SCG is an activated state or a deactivated state; and when the first indication information indicates that the state of the SCG is the deactivated state, the terminal device determining a behavior after the SCG is deactivated and/or whether to execute a procedure of random access to a PS Cell after the SCG is deactivated.