Access Gateway Routing for Public and Dedicated Core Networks
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Solution Overview
Problem
Current communication protocols fail to distinguish between public and dedicated network subscribers when selecting core networks, leading to incorrect network service provision and reduced access efficiency.
Innovation Solution
An access gateway determines the appropriate core network for a terminal device by analyzing its identifier, subscription data, and location information, ensuring correct routing of registration requests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the access network device uses current communication protocols for AMF selection, then the selection process is simple, but the correct core network cannot be distinguished between public and dedicated network subscribers
Solution Approach 1:
The access gateway performs preliminary analysis of the terminal device's identifier before forwarding the registration request to the AMF. By examining the identifier in advance and determining the appropriate core network type (public or dedicated), the system ensures correct routing from the outset, resolving the contradiction between simple selection process and accurate subscriber type identification
Solution Approach 2:
The access gateway acts as an intermediary between the access network device and the core network. It receives the registration request, analyzes the terminal identifier, determines the appropriate core network type, and then forwards the request to the correct AMF. This intermediary function enables accurate subscriber type identification without complicating the overall selection process
2Reliability
If the access gateway analyzes terminal identifier to determine core network type, then correct network access is achieved, but the access gateway complexity increases
Solution Approach 1:
The access gateway extracts only the necessary identifier information from the terminal device's registration request to determine the core network type. By focusing on specific identifier fields rather than analyzing the entire registration request comprehensively, the gateway achieves reliable network selection while minimizing the increase in processing complexity
Solution Approach 2:
The access gateway applies different analysis depths to different parts of the identifier based on local requirements. It examines specific portions of the identifier that are relevant for distinguishing between public and dedicated network subscribers, rather than uniformly analyzing the entire identifier structure, thus balancing reliability with controlled complexity
3Adaptability or versatility
If network slice information is required for AMF selection, then network service differentiation is improved, but UEs incapable of carrying network slice information cannot be properly routed
Solution Approach 1:
The access gateway performs self-service by using the terminal device's identifier to autonomously determine the appropriate core network type without requiring external network slice information from the UE. This self-service capability ensures that even UEs incapable of carrying network slice information can be properly routed, maintaining high access success rates while still enabling network service differentiation through identifier-based analysis
Data Source
AI summary
Embodiments of this application provide a network access method and a communication apparatus, so that a terminal device can access a proper core network. According to the method provided in embodiments of this application, an access gateway connected to an access management network element in a public core network and an access management network element in a dedicated core network is introduced, so that when determining the proper core network that provides a service for the terminal device, the access gateway can route a registration request of the terminal device to an access management network element included in the core network that provides the service for the terminal device.