SNPN Handover Authentication via Network Identity Notification
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Solution Overview
Problem
During a handover between stand-alone non-public networks (SNPNs), identity authentication fails due to inconsistencies in serving network names, leading to potential connection losses with terminal devices.
Innovation Solution
A communication method where a network device sends first information to a terminal device indicating the identity of the SNPN it is being handed over to, allowing both devices to use the new SNPN identity for authentication, thereby avoiding authentication failures and maintaining network connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the terminal device uses the SNPN identity selected during initial access for identity authentication after handover, then the authentication process is simple, but identity authentication fails due to serving network name inconsistency
Solution Approach 1:
The network device performs preliminary action by determining the SNPN identity before handover and notifying the terminal device in advance through the handover command. This allows the terminal device to update its serving network name before actual handover execution, ensuring consistency between network device and terminal device without complicating the authentication process.
Solution Approach 2:
The network device provides feedback to the terminal device about the target SNPN identity through the handover command. This feedback mechanism ensures that the terminal device has accurate information about the serving network name it should use after handover, preventing authentication failures caused by name inconsistency.
2Reliability
If the network device releases connection due to authentication failure, then network security is maintained, but user experience deteriorates due to unnecessary connection releases
Solution Approach 1:
The network device performs preliminary action by notifying the terminal device of the correct SNPN identity before handover completion. This prevents authentication failures that would trigger unnecessary connection releases, thereby maintaining both network security and good user experience.
Solution Approach 2:
The network device takes preliminary anti-action by providing the correct serving network name information in advance, which prevents the harmful effect of authentication failure and subsequent connection release. This anticipatory measure eliminates the need for connection release while maintaining security.
3Measurement precision
If additional signaling is used to transmit SNPN identity information, then authentication accuracy improves, but air interface signaling overhead increases
Solution Approach 1:
The SNPN identity information is merged with the existing handover command message structure. By combining the identity information with the handover instruction in a single message, the patent avoids additional separate signaling transmissions, thereby improving authentication accuracy without significantly increasing air interface signaling overhead.
Data Source
AI summary
This application provides a communication method and apparatus, and the method includes: receiving, by a terminal device, first information sent by a network device (S201), where the first information is used to indicate an identity of a first stand-alone non-public network SNPN which the terminal device is handed over to or is to be handed over to through an SNPN handover. In this manner, during the SNPN handover or after the SNPN handover, the terminal device is notified of the identity of the first SNPN selected by a network device side, thereby avoiding a failure of identity authentication caused by inconsistency of serving network names.