Core Network Device Selection Using Auxiliary Parameters
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Solution Overview
Problem
Existing core network device selection methods in communications systems lead to increased signaling overheads and access delays due to redirection processes, particularly when a terminal accesses an incorrect dedicated core network.
Innovation Solution
The proposed method reduces signaling interactions by using network selection auxiliary parameters such as mobility management device types and slice types to determine group identifiers of mobility management device groups, allowing for efficient selection of mobility management devices, thereby minimizing access delays and improving matching success rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a terminal accesses a dedicated core network using the prior art method, then the dedicated core network can determine the correct network based on usage type, but extra signaling overheads are generated and access delay increases due to the redirection process
Solution Approach 1:
The terminal performs preliminary actions by determining the usage type locally before accessing the core network. The terminal uses the usage type to select an appropriate mobility management device group and identifies a target mobility management device in advance, so that when the access request is sent, the correct device is already identified, eliminating the need for redirection and reducing access delay
Solution Approach 2:
The usage type acts as an intermediary parameter that the terminal uses to map to mobility management device groups. This intermediary enables the terminal to translate its service requirements into concrete device selection criteria, allowing direct access to the correct core network device without requiring the core network to perform redirection
2Reliability
If a terminal accesses a dedicated core network using the prior art method, then the dedicated core network can determine the correct network based on usage type, but signaling overheads increase due to the redirection process
Solution Approach 1:
The invention extracts the network selection function from the core network device and relocates it to the terminal. The terminal independently determines the usage type, selects the mobility management device group, and identifies the target device, thereby removing the need for redirection signaling between the terminal and core network devices. This extraction eliminates unnecessary signaling overhead while maintaining correct network selection
Solution Approach 2:
The terminal performs self-service by autonomously determining its usage type and selecting the appropriate mobility management device without requiring assistance from the core network. The terminal uses its own resources and information to complete the network selection process, eliminating the need for additional signaling interactions with the core network devices
Data Source
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AI summary
A core network device selection method and apparatus are disclosed. The method includes: receiving, by an access network node, an access stratum message sent by a terminal, where the access stratum message includes a NAS request message and a network selection auxiliary parameter; querying, by the access network node, configuration information based on the network selection auxiliary parameter, and determining a group identifier of at least one mobility management device group, where the configuration information includes a correspondence between a network selection auxiliary parameter and a group identifier of a mobility management device group; determining a device identifier of a target mobility management device based on the group identifier of the at least one mobility management device group; and sending, by the access network node, the NAS request message to a mobility management device indicated by the device identifier of the target mobility management device. Therefore, a redirection process can be effectively avoided, so that signaling interaction between network devices is reduced, and a network access delay of the terminal is reduced.