Question: In a Lawful Interception scenario for a ProSe Remote UE connected to a ProSe UE-to-NW Relay, what action is taken by the S-GW/PDN-GW if the warrant requires intercepting both Content of Communication (CC) and non-CC, given the shared PDN connection with non-target UEs?
Option 1: The S-GW/PDN-GW combines all CC and non-CC for efficiency, sending over a single interface.
Option 2: The S-GW/PDN-GW isolates the target UE's CC but not non-CC, sending only CC over the X3 interface.
Option 3: The S-GW/PDN-GW isolates the target ProSe Remote UE's entire communication (both CC and non-CC) from non-target UEs' content, specifically sending CC related to the target UE over the X3 interface.
Option 4: The S-GW/PDN-GW terminates the PDN connection to prevent mixed communications.
Explanation: To maintain the integrity of the interception process while respecting privacy and the specificity of the warrant, the S-GW/PDN-GW must isolate the communication of the target ProSe Remote UE from that of non-target UEs using the same PDN connection. This isolation ensures that only relevant Content of Communication (CC) is intercepted and sent over the X3 interface, as required for lawful interception procedures.