UE Specific Anonymity Challenge Parameter for Fake Base Station Detection
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Solution Overview
Problem
In wireless communication systems, User Equipment (UE) lacks proper verification of base stations before handover, leading to potential attachment to fake or rogue base stations, which can result in downgraded services and security vulnerabilities, as existing methods do not adequately protect against tampered System Information Blocks (SIBs) and lack mechanisms for detecting and isolating fake base stations.
Innovation Solution
The implementation of a method that generates a UE-specific Anonymity Challenge Parameter based on sensitive information, cell information, and an initial challenge parameter, which is negotiated between the source and target base stations to prevent attachment to false base stations, using a token passing mechanism and secure token verification to ensure legitimacy and isolate fake base stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the UE performs signal power measurement of neighboring cells based on Synchronization Signal Block without security protection, then the UE can acquire basic cell information for handover, but the UE may attach to a fake base station leading to security vulnerabilities and service degradation
Solution Approach 1:
The patent applies preliminary action by having the source base station generate and provide an anonymity challenge parameter to the UE before the handover measurement and selection process. This pre-prepared security mechanism enables the UE to verify the authenticity of target base stations during handover, preventing attachment to fake base stations while maintaining seamless handover operation.
Solution Approach 2:
The patent introduces an anonymity challenge parameter as an intermediary security element between the UE and base stations. This parameter acts as a mediator that enables the UE to authenticate target base stations during handover without requiring direct complex cryptographic verification, thus ensuring security while simplifying the handover process.
2Productivity
If the UE logs measurement report based on tampered System Information Block, then the handover decision can be made, but the UE may be directed to a fake base station causing service downgrading and security breaches
Solution Approach 1:
The patent applies preliminary action by equipping the UE with an anonymity challenge parameter before the measurement and handover decision process. This enables the UE to verify the authenticity of target base stations identified through measurement reports, preventing redirection to fake base stations while maintaining rapid handover decision-making capability.
Solution Approach 2:
The patent implements feedback by using the anonymity challenge parameter to verify base station authenticity during handover. The verification result provides feedback that confirms whether the selected target base station is legitimate, preventing the UE from attaching to fake base stations identified through potentially tampered measurement reports.
3Productivity
If no verification mechanism is implemented for base station legitimacy, then the system operation is simple and fast, but fake base stations cannot be detected or isolated leading to denial of service and privacy breaches
Solution Approach 1:
The patent applies preliminary action by pre-distributing anonymity challenge parameters to UEs and configuring source base stations with target base station verification information before handover operations. This pre-configuration enables rapid authenticity verification during handover without adding significant processing delays, thus maintaining high system operation speed while ensuring service continuity through fake base station detection.
Solution Approach 2:
The patent introduces an anonymity challenge parameter as an intermediary verification mechanism that enables fast authentication of base stations during handover. This intermediary element allows the system to maintain simple and fast operations while incorporating reliability checks that prevent service disruption from fake base station attacks.
Data Source
AI summary
The method includes: generating, by a source base station, a UE specific Anonymity Challenge Parameter to the UE based on sensitive information from the UE, cell information, source base station information and initial Anonymity Challenge Parameter assigned to the particular base station; and sending, by the source base station, a measurement command message including the UE specific Anonymity Challenge Parameter to the UE. Further, the method includes receiving, by the source base station, an Anonymity Challenge Parameter acknowledgement as a response from the UE; and negotiating, by the source base station, the UE specific Anonymity Challenge Parameter with the UE to prevent the UE from attaching to the false base station.