UE Leaving Notification for Network State Synchronization
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Solution Overview
Problem
Multi-card terminal devices experiencing unsynchronized network states lead to incorrect statistics collection and resource waste due to network data transmission after leaving a network.
Innovation Solution
Implementing a state notification method where UE determines, based on configuration information, whether to send a leaving notification message to the network device before leaving, ensuring the network is informed of the UE's departure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the multi-card terminal device directly leaves one network and camps on another network without notification, then the terminal device can quickly switch networks and maintain operational flexibility, but the network state and terminal state become unsynchronized, causing incorrect statistics collection and unnecessary service processing in the network
Solution Approach 1:
The terminal device sends a leaving notification message to the network device before actually leaving the network. This preliminary action informs the network in advance about the upcoming departure, allowing the network to update its records and stop unnecessary service processing before the terminal actually disconnects, thus maintaining state synchronization without compromising switching flexibility
Solution Approach 2:
The network device receives feedback from the terminal device through the leaving notification message, which provides information about the terminal's intended network departure. This feedback mechanism allows the network to adjust its service processing and statistics collection accordingly, maintaining accurate state information while the terminal maintains operational flexibility
2Reliability
If the network continues to send data or reserve data for the terminal device after the terminal leaves the network, then the network maintains service availability for the terminal, but this causes waste of network resources due to unsynchronized state information
Solution Approach 1:
The leaving notification message is sent before the terminal actually leaves the network, providing advance warning to the network device. This allows the network to proactively stop data transmission and release reserved resources before the terminal disconnects, eliminating resource waste while maintaining service availability up until the actual departure moment
Solution Approach 2:
The potential harm of resource waste caused by unsynchronized state information is converted into a benefit by using the leaving notification mechanism. The notification transforms the problem of state desynchronization into an opportunity for the network to optimize resource allocation, stopping unnecessary service processing and freeing resources that would otherwise be wasted
Data Source
AI summary
A state notification method, a device, and a system are provided. The state notification method includes: before the first UE leaves a first network on which the first UE camps, determining, according to leaving notification configuration information, whether to send a leaving notification message; and when determining to send a leaving notification message, sending a leaving notification message to a first network device. The leaving notification message is used to indicate that the first UE will leave the first network, and the first network is a network in which the first network device is located.