UE Leave Notification for Multi-Card Network Switching
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Solution Overview
Problem
Multi-card terminal devices experience synchronization issues with networks, leading to incorrect statistics collection and resource waste due to networks sending data after the device leaves, causing unnecessary service processing.
Innovation Solution
A state notification method where the UE determines, based on leaving notification configuration information, whether to send a leaving notification message to the network device before leaving, ensuring the network is informed and can stop service processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the multi-card terminal device directly leaves one network to camp on another network without notification, then the device can quickly switch networks and maintain service continuity, but the original network continues to send data and reserve resources for the device, causing resource waste and incorrect statistics collection
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 stop service processing and release resources before the device actually switches networks, thus preventing resource waste while maintaining quick switching capability
Solution Approach 2:
The network device receives feedback from the terminal device through the leaving notification message, which provides information about the terminal's intent to leave. This feedback mechanism enables the network to adjust its resource allocation and service processing accordingly, stopping unnecessary operations and releasing reserved resources to avoid waste
2Loss of energy
If the terminal device sends a leaving notification message to the network device, then the network can stop service processing and avoid resource waste, but the device cannot quickly switch networks without prior notification
Solution Approach 1:
The leaving notification is sent in advance before the actual network switch occurs, allowing the network to prepare for resource release without delaying the terminal's network switching operation. The notification is a brief signaling action that does not significantly impact switching time while enabling the network to optimize resource usage
3Reliability
If the network continues to process services and collect statistics for the terminal after it has left, then service continuity is maintained, but incorrect statistics are collected and unnecessary processing occurs
Solution Approach 1:
The leaving notification message provides critical feedback to the network device that the terminal intends to leave. Upon receiving this feedback, the network device can accurately update its records, stop service processing for the departed terminal, and prevent the collection of incorrect statistics, thereby maintaining both service reliability for active users and statistical accuracy
Solution Approach 2:
The leaving notification mechanism allows the network to extract or remove the departed terminal from its active service processing and statistics collection systems. This separation ensures that resources and processing are allocated only to active terminals, preventing incorrect statistics while maintaining service continuity for remaining users
Data Source
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AI summary
Provided in the embodiments of the present invention are a status notification method, device and system. The method comprises: before a first UE leaves a first network in which the first UE resides, determining, according to leave notification configuration information, whether to send a leave notification message; and if determined to send the leave notification message, sending the leave notification message to a first network device, the leave notification message being used for instructing the first UE to leave the first network, and the first network being the network in which the first network device is located.