Terminal Network Access via Route Selection Policy
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Solution Overview
Problem
Current solutions do not allow a device accessing a private network via a PLMN subscription to utilize private network base station resources for public network services, and dual radio capabilities of terminals are not fully activated when registering with both public and private networks.
Innovation Solution
A method for a terminal to access public and private networks by sending a registration request to a first network, receiving a route selection policy, and selecting the first network to establish a PDU session of a second network, allowing permission-based selection and activation of dual radio capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a terminal registers with both public and private networks simultaneously, then network service coverage is improved, but device complexity and radio resource management become more complex
Solution Approach 1:
The patent segments network access by introducing route selection policies that divide network traffic into different paths (public network vs. private network). The terminal receives policy information from the network that specifies which DNNs or S-NSSAIs should use which network type, effectively segmenting the network access complexity into manageable routing decisions rather than requiring the terminal to manage all radio resources simultaneously.
Solution Approach 2:
The patent introduces route selection policy information as an intermediary mechanism between the network and terminal. This policy information acts as a mediator that guides the terminal's network selection behavior, reducing the terminal's decision-making complexity while maintaining versatile network access. The network side controls the complexity through policy deployment rather than requiring complex terminal-side management.
2Adaptability or versatility
If dual radio capabilities are activated for simultaneous public and private network access, then network service versatility is improved, but energy consumption increases
Solution Approach 1:
The patent implements dynamic route selection where the terminal can switch between public and private network access based on received policy information. Rather than continuously activating dual radio capabilities, the terminal dynamically selects the appropriate network path for each PDU session based on the deployed policies, reducing energy consumption while maintaining service versatility when needed.
Solution Approach 2:
The patent changes the routing parameter (network path selection) based on policy information received from the network. By modifying which network interface is used for different data flows rather than continuously using both interfaces, the system achieves versatile network access while controlling energy consumption through parameter-based route selection rather than constant dual-radio operation.
3Productivity
If private network base station resources are used for public network services, then resource utilization is improved, but network security and access control become more complex
Solution Approach 1:
The patent enables private network base station resources to serve multiple functions - both private network services and public network services. By deploying route selection policies that allow public network PDU sessions to be established through private network access points, the system achieves multi-functionality of the base station resources while maintaining separate access control mechanisms for different network types.
Solution Approach 2:
The patent creates a virtual copy of network access control by deploying policy information that replicates network selection logic at the terminal side. Rather than requiring complex real-time access control decisions at the base station for each service type, the control logic is copied to the terminal through policy deployment, simplifying the base station's access control while enabling flexible resource utilization.
Data Source
AI summary
This application discloses a method for a terminal to access public and private networks and a communications apparatus. One example method includes: sending a first registration request, wherein the first registration request indicates a request for registration of a terminal in a first network; receiving a route selection policy of the terminal for a protocol data unit (PDU) session of a second network, wherein the route selection policy indicates the terminal to select the first network to establish the PDU session of the second network, and the second network is a home network of the terminal; and selecting, based on the route selection policy, the first network to establish the PDU session of the second network.