Terminal SCG Resource Release and Random Access
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Solution Overview
Problem
In the context of 5G and beyond wireless communication systems, the deactivation of a secondary cell group (SCG) leads to occupied uplink resources, reducing resource efficiency and causing delays in SCG activation due to unmanaged Time Alignment Timers (TAT).
Innovation Solution
A terminal and radio communication method that releases SCG resources upon deactivation and performs a random access procedure upon activation, considering the expiration or forced expiration of TAT, to prevent resource occupancy and enhance efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If SCG deactivation is implemented to reduce power consumption, then power consumption is reduced, but uplink resources are occupied and resource efficiency deteriorates
Solution Approach 1:
The patent applies preliminary action by having the terminal perform a random access procedure before SCG activation is fully completed. The terminal sends a random access message to the network side before the SCG activation is finalized, allowing the network to allocate resources in advance and avoid resource occupation during the activation transition period. This resolves the contradiction by preparing resource allocation beforehand, ensuring resources are not occupied during SCG deactivation while maintaining efficient activation when needed.
2Use of energy by moving object
If SCG deactivation is implemented to reduce power consumption, then power consumption is reduced, but activation delay increases
Solution Approach 1:
The patent applies preliminary action by having the terminal perform random access procedure and send random access messages before SCG activation is finalized. This preliminary preparation allows the network to allocate resources in advance and understand the terminal's activation needs beforehand, thereby reducing the actual activation delay when SCG activation is triggered, while still maintaining power savings during the deactivated state.
Solution Approach 2:
The patent applies feedback by having the terminal send random access messages to the network side during the activation process. This feedback mechanism allows the network to receive real-time information about the terminal's activation status and resource needs, enabling dynamic resource allocation that reduces activation delay while maintaining the power consumption benefits of SCG deactivation.
3Device complexity
If Time Alignment Timer (TAT) is not managed during SCG deactivation, then resource release is simplified, but resource efficiency deteriorates due to unmanaged timer occupancy
Solution Approach 1:
The patent applies preliminary action by having the terminal perform random access procedure and send messages before SCG activation is finalized. This preliminary action allows the terminal to manage the Time Alignment Timer proactively, sending resource release indications to the network before activation completes. This resolves the contradiction by preparing timer management in advance, simplifying the overall process while ensuring resources are efficiently allocated and not occupied during deactivation.
Data Source
AI summary
A terminal includes a control unit that releases a resource of a secondary cell group in response to deactivation of the secondary cell group, in which the control unit performs a random access procedure to the secondary cell group in response to activation of the secondary cell group.