S-CSCF Secondary Identifier Detection During IMS Registration
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Solution Overview
Problem
Network devices struggle to determine if a user device registered with one identifier is also associated with another identifier, leading to potential missed monitoring of suspicious activity across multiple identifiers.
Innovation Solution
Implementing a system where the Serving Call Session Control Function (S-CSCF) monitors activity by checking the monitored identifier list during the registration process, allowing it to detect and associate secondary user device identifiers without additional requests, thus conserving resources and reducing network congestion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network device sends additional requests to determine secondary user device identifiers, then monitoring completeness is improved, but network congestion and processing overhead increase
Solution Approach 1:
The patent applies preliminary action by obtaining secondary user device identifiers during the registration phase, before monitoring needs to be established. The S-CSCF retrieves all associated identifiers (primary and secondary) when the user device first registers, storing them for future monitoring operations. This eliminates the need for subsequent additional requests to discover secondary identifiers, thereby ensuring monitoring completeness without adding processing overhead during actual monitoring operations.
2Reliability
If the network device monitors all user device identifiers, then security monitoring is improved, but bandwidth consumption increases
Solution Approach 1:
The patent applies preliminary action by pre-obtaining and storing secondary user device identifiers during the registration phase. The S-CSCF retrieves all associated identifiers upfront and stores them in a data structure that enables efficient monitoring. This ensures that when security monitoring is needed, the S-CSCF can immediately monitor all identifiers without additional bandwidth consumption for discovery requests, thus improving security monitoring while minimizing bandwidth usage.
3Reliability
If the S-CSCF obtains secondary identifiers during registration, then monitoring effectiveness is improved, but registration process complexity increases
Solution Approach 1:
The patent applies merging by combining the identifier acquisition operation with the existing registration process. The S-CSCF uses the same registration signaling messages (such as the Registration Request and Registration Accept messages in IMS networks) to both register the user device and retrieve associated secondary identifiers. By merging these operations into a single unified process, the patent improves monitoring effectiveness without adding separate complexity to the registration flow.
4Measurement precision
If additional requests are sent to detect secondary identifiers, then identifier detection accuracy is improved, but processing power consumption increases
Solution Approach 1:
The patent applies preliminary action by obtaining secondary user device identifiers during the initial registration phase, before monitoring operations begin. The S-CSCF retrieves all associated identifiers upfront using existing registration signaling, stores them efficiently, and makes them available for immediate monitoring. This ensures complete and accurate identifier detection without requiring additional processing power during actual monitoring operations, as all identifiers are already known and stored.
Data Source
AI summary
A system may receive a registration request that identifies a first user device identifier. The system may determine that the first user device identifier is not registered. The system may transmit an authentication challenge. The authentication challenge may request one or more credentials associated with a subscriber profile. The first user device identifier may be associated with the subscriber profile. The system may cause the first user device identifier to be registered based on a challenge response. The first user device identifier may be registered based on a result of authenticating the registration request. The system may receive subscriber information that is associated with the first user device identifier, based on causing the first user device identifier to be registered. The system may determine that the subscriber information identifies a second user device that may be associated with the subscriber profile. The system may provide a notification.