UE SoR Integrity Verification During Mobility Registration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems fail to ensure that a user equipment (UE) receives and verifies steering of roaming (SoR) information during mobility registration in untrusted visited public land mobile networks (VPLMNs), leading to potential manipulation by fraud networks and UE getting stuck in low-priority networks.
Innovation Solution
The UE is configured to expect SoR information during initial and mobility registrations, with the home public land mobile network (HPLMN) ensuring delivery of SoR information through an extended AMF context indicator and integrity checks, allowing the UE to prioritize high-priority networks based on received and verified SoR data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE performs mobility registration in a VPLMN without verifying SoR information, then the registration process is faster and simpler, but the network security is compromised and the UE may be steered to low-priority or fraudulent networks
Solution Approach 1:
The system performs preliminary integrity verification of SoR information during the mobility registration process. The AMF checks whether the UE expects SoR information and verifies its integrity before completing registration, preventing fraudulent network steering while maintaining a streamlined process through early validation.
Solution Approach 2:
The system implements feedback mechanisms where the AMF monitors whether the UE expects SoR information and adjusts the registration流程 accordingly. The integrity check results feed back into the registration decision, ensuring security requirements are met without unnecessarily complicating the process for UEs that don't require SoR verification.
2Loss of information
If the HPLMN sends SoR information to the UE during every mobility registration, then the UE always has up-to-date roaming preferences, but the signaling overhead and network traffic increase
Solution Approach 1:
The system applies partial action by sending SoR information selectively - only when the UE indicates it expects SoR information during mobility registration. The AMF checks the UE's expectations and only performs integrity verification and information delivery when needed, avoiding unnecessary signaling overhead while ensuring information freshness when required.
3Reliability
If the UE always attempts to receive and verify SoR information during mobility registration, then the UE avoids fraudulent networks, but the registration process takes longer due to integrity checks
Solution Approach 1:
The integrity verification of SoR information is performed as a preliminary check during the mobility registration process, before final registration completion. This early verification prevents fraudulent network acceptance while integrating seamlessly into the existing registration timeline, minimizing additional delay.
Solution Approach 2:
The system performs integrity verification selectively - only when the UE indicates it expects SoR information. For UEs that don't require SoR verification, the registration process proceeds without additional integrity check steps, maintaining normal registration speed while ensuring security for UEs that need it.
Data Source
AI summary
Systems and methods provide steering of roaming (SoR) information during a user equipment (UE) mobility registration process. In other systems and methods, instead of triggering mobility and periodic registration, a UE performs initial registration until a valid SoR is received in a visited country or network as long as a subscriber identification module (SIM) or a universal SIM (USIM) of the UE indicates that the UE is expected to receive SoR information due to initial registration in a visited public land mobile network (VPLMN).