5G RRC Inactive State Context Release via Indication Signals
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Solution Overview
Problem
In 5G network environments, the large number of terminal devices in the RRC_INACTIVE state causes significant load on base stations and core networks, leading to poor user experience due to the inability to efficiently release network resources and reconnect quickly.
Innovation Solution
A state switching method that generates and sends indication information to terminal devices to determine whether to release context information, using bit sequences and characteristic information such as access class values, service types, and quality of service to manage network resource allocation and relieve network loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If terminal devices are retained in RRC_INACTIVE state to maintain context information, then connection recovery speed is improved, but network device load increases
Solution Approach 1:
The network device performs preliminary actions by sending indication information to terminal devices in advance, instructing them to release context information before the network becomes overloaded. This prevents the accumulation of inactive terminal contexts that would otherwise increase network device load while maintaining the ability to quickly reconnect terminals that need to maintain their context.
Solution Approach 2:
The patent changes the state parameter of terminal devices by introducing indication information that triggers context information release. This parameter change allows terminal devices to transition from maintaining context information to releasing it, thereby controlling network device load while preserving connection recovery capabilities for terminals that require them.
2Ease of operation
If all terminal devices maintain context information, then user experience is improved, but network resources are wasted
Solution Approach 1:
The patent applies local quality by differentiating between terminal devices based on their characteristics. The indication information is sent selectively to specific terminal devices that meet certain criteria (such as those with characteristic information matching the indication), causing only those terminals to release context information while others continue to maintain it. This ensures good user experience for terminals that need it while saving network resources for terminals that don't require context maintenance.
Solution Approach 2:
The patent implements discarding and recovering by having terminal devices release (discard) context information when receiving indication information, while preserving the ability to recover context information when needed. This selective discarding optimizes network resource usage while maintaining user experience quality for terminals that require context information.
3Quantity of substance
If batch uninstallation of terminal devices is performed, then network resources are released, but connection reliability may be affected
Solution Approach 1:
The patent uses feedback mechanisms where terminal devices report their characteristic information to the network device, and the network device sends indication information back to specific terminals based on this feedback. This feedback loop ensures that batch uninstallation is performed intelligently - only terminals whose context information release will not negatively impact connection reliability are selected for context release, while terminals requiring reliable connections maintain their context information.
Data Source
AI summary
Provided are a state switching method, a network device and a terminal device. The method is used for a first terminal device in an inactive state; the inactive state indicates that the first terminal device and a network device are in a disconnection state, and the first terminal device and the network device retain context information of the first terminal device. The method includes: generating indication information, which is used to indicate the first terminal device to release the context information, or not to release the context information; and sending the indication information to the first terminal device.