5.3 Interrogation

03.333G security3GPPLawful InterceptionStage 2TS

The purpose of interrogation is consistency checking for the interception function. It can be use e.g. for audit functionality, but this is beyond the scope of the present document.

Interrogation of all activations for a given LEA is an ADMF filter function.

5.3.1 Interrogation of the MSC/VLR and the GMSC

The following picture shows the information flow for the interrogation of the Lawful interception. It must be possible to interrogate

– a specific activation at this MSC/VLR or GMSC for a given target identity;

– all activations at this MSC/VLR or GMSC.

As result of the interrogation the activation status and data are returned.

Figure 9: Interrogation of the Lawful Interception (MSC/VLR, GMSC)

5.3.2 Interrogation of Delivery Functions

The following picture shows the information flow for the interrogation of the Lawful interception. It must be possible to interrogate:

– a specific activation at a Delivery Function for a given activation id;

– all activations at a Delivery Function for a given target identity;

– all activations at a Delivery Function.

As result of the interrogation the activation status and data are returned.

Figure 10: Interrogation of the Lawful Interception (Delivery Functions)