Network Redirection via Access Network Intermediary
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Solution Overview
Problem
Current network switching between 5G and 4G core networks is unreliable due to dependency on the N26 interface, leading to less reliable connections when this interface is unavailable or fails.
Innovation Solution
A network redirection method where an access network device sends network switching instruction information to a terminal, allowing it to determine and access a target core network type, enabling switching between different core networks without relying on specific interfaces between them.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If network switching between NGCN and EPC depends on the N26 interface, then network switching can be implemented through a standardized interface, but network switching reliability deteriorates when the N26 interface is unavailable or fails
Solution Approach 1:
The access network device acts as an intermediary that receives network switching request information from the mobility management device and forwards network switching instruction information to the terminal. This intermediary role allows the terminal to obtain target core network type information and access the target core network without directly depending on the N26 interface between core network devices, thereby resolving the reliability issue while maintaining switching capability.
2Ease of manufacture
If the N26 interface is used for network switching, then interface standardization is achieved, but network switching fails when the interface is unavailable
Solution Approach 1:
The network switching process is segmented into multiple independent stages: (1) the mobility management device sends network switching request information to the access network device, (2) the access network device sends network switching instruction information to the terminal, and (3) the terminal accesses the target core network based on the instruction information. This segmentation allows the terminal to independently obtain target core network type information and access the target core network without requiring the N26 interface to be available, thus maintaining interface standardization while improving availability.
3Device complexity
If network switching depends on core network interface availability, then interface management is simplified, but terminal access reliability to target core network deteriorates
Solution Approach 1:
The access network device serves as a mediator that receives network switching request information from the mobility management device and provides network switching instruction information to the terminal. This intermediary mechanism enables the terminal to independently determine the target core network type and access it without being affected by the availability of interfaces between core network devices, thereby maintaining simple interface management while improving terminal access reliability.
Data Source
AI summary
A network redirection method and a terminal are provided. In the embodiments of the present invention, an access network device delivers network switching instruction information used for redirection to a terminal. The network switching instruction information instructs the terminal to obtain a core network type of a target core network of redirection to access a target core network based on the core network type. Network switching between different types of core networks can be implemented without depending on interfaces between the different types of core networks, thereby improving reliability of network switching between different types of core networks.