Network Mediation Device POI Identification via Intercepted Data Labeling
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Solution Overview
Problem
Existing lawful interception systems face challenges in reliably informing law enforcement monitoring facilities about the identity of the point of interception (POI) that intercepted data, as the POI may not always send its identifier.
Innovation Solution
A network mediation device is equipped to determine the identity of the POI based on network topology information and label the intercepted data with a header field that identifies the POI, ensuring reliable identification even if the POI does not send its identifier.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the POI sends its identifier to the network mediation device, then the law enforcement monitoring facility can identify the POI, but the POI may not always send its identifier making the identification unreliable
Solution Approach 1:
The network mediation device acts as an intermediary that receives data from the POI and adds POI identification information to the data before forwarding it to the law enforcement monitoring facility. This mediator approach ensures that even if the POI does not send its identifier, the network mediation device can still provide accurate POI identification through the added header field.
Solution Approach 2:
The network mediation device performs preliminary action by proactively adding the POI identification header field to the intercepted data before forwarding it to the law enforcement monitoring facility. This preliminary addition of identification information ensures that the POI is reliably identified regardless of whether the POI itself sends its identifier.
2Device complexity
If the POI identifier is made optional and only supported for certain services, then device complexity is reduced, but the ability to reliably inform law enforcement about POI identity is compromised
Solution Approach 1:
The network mediation device implements a universal solution that works for all services and POIs regardless of whether they support identifier sending. By adding the POI identification capability to the network mediation device's standard operation, the system achieves universal POI identification across all services without requiring each POI to have identifier support.
3Reliability
If the network mediation device determines POI identity based on network topology information and labels data accordingly, then POI identification reliability is improved, but the device complexity increases
Solution Approach 1:
The network mediation device performs self-service by automatically determining POI identity from network topology information and adding the appropriate identification header to intercepted data. This self-service capability allows the device to autonomously provide accurate POI identification without requiring external intervention or complex manual configuration.
Data Source
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AI summary
A network mediation device (22) receives data (18) intercepted at a point of interception (20) in the communication network (10) as part of a lawful interception service. The network mediation device (22) labels the data (18) with a field (24) that has a value set to identify the point of interception (20) at which the data (18) was intercepted. The network mediation device (22) in this regard determines the value to which to set the field (24) based on information (28) stored in the network mediation device (22) indicating different values to which to respectively set the field (24) for different possible points of interception in the communication network (10). The network mediation device (22) sends the labeled data (18L) over a handover interface (26) from the network mediation device (22) towards a law enforcement monitoring facility (16).