UE Authentication Failure Recovery via Cell Selection
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Solution Overview
Problem
In wireless communication systems, user equipment (UE) experiences inconvenience due to authentication failures, where consecutive authentication rejection messages lead to network disconnection, requiring user intervention for restart or SIM/USIM re-entry to reconnect.
Innovation Solution
The UE automatically attempts to reconnect to the network by selecting a different cell and initiating a new attach procedure after receiving authentication rejection messages, clearing stored parameters to reduce authentication failures, and following indicators from the network for detach, attach, or radio access technology switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network node sends authentication rejection message after consecutive authentication failures, then authentication security is improved, but user convenience deteriorates requiring manual intervention
Solution Approach 1:
The UE is configured to automatically initiate a new attach procedure upon receiving authentication rejection, enabling self-service recovery without requiring user intervention. The device autonomously clears stored parameters and attempts reconnection, making the system self-correcting while maintaining security.
Solution Approach 2:
The system changes the operational state by clearing stored parameters (GUTI, TAI, eKSI) when authentication fails, then initiates a fresh attach procedure with reset parameters. This parameter reset mechanism allows the UE to bypass the blocked authentication state and reconnect, resolving the contradiction between security enforcement and user convenience.
2Reliability
If the UE clears stored parameters after authentication rejection, then authentication failure resolution is improved, but device complexity increases
Solution Approach 1:
The solution extracts and removes the problematic stored parameters (GUTI, TAI, eKSI) from the UE memory when authentication fails. By taking out these potentially corrupted or invalid parameters, the system enables fresh authentication attempts without carrying over erroneous state information, improving failure resolution while keeping the mechanism simple.
Solution Approach 2:
Instead of trying to fix the authentication issue by adjusting authentication parameters, the system inverts the approach by completely clearing the stored network parameters and starting fresh with a new attach procedure. This inversion strategy simplifies the resolution logic by eliminating the need for complex parameter adjustment algorithms.
3Ease of operation
If the UE automatically reconnects after authentication rejection, then user convenience is improved, but network security may deteriorate
Solution Approach 1:
The UE performs preliminary actions by clearing all stored parameters (GUTI, TAI, eKSI) before initiating the reconnection attempt. This preliminary cleanup ensures that the automatic reconnection does not reuse potentially compromised authentication data, maintaining security while enabling convenient automatic recovery.
Solution Approach 2:
The system implements feedback by monitoring authentication rejection messages and automatically triggering a parameter clear operation followed by a new attach procedure. This closed-loop feedback mechanism ensures that automatic reconnection only occurs after proper state reset, preventing security vulnerabilities while maintaining user convenience.
Data Source
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AI summary
A method for handling authentication failures in a wireless communication system includes transmitting, by a user equipment (UE) and via a first cell, a first plurality of messages including at least one of AUTHENTICATION AND CIPHERING FAILURE messages or AUTHENTICATION FAILURE messages, where two or more of the first plurality of messages indicate at least one of synch failure or medium access control (MAC) failure, and where the UE includes at least one of a subscriber identity module (SIM) or universal SIM; receiving at least one of an AUTHENTICATION REJECT message or an AUTHENTICATION AND CIPHERING REJECT message subsequent to transmitting the two or more of the first plurality of messages indicating at least one of synch failure or MAC failure; and in response to receiving the at least one of an AUTHENTICATION REJECT message or an AUTHENTICATION AND CIPHERING REJECT message, transmitting an ATTACH message via a second cell.