Question: In a PMIP-based S5/S8 architecture, upon detecting a Detach or PDN disconnection at the PDN Gateway (PDN-GW), what action is initiated by the PDN-GW regarding event generation?
Option 1: Generate a GTP detach/tunnel deactivation event directly to the MME
Option 2: Trigger an immediate release of all UE's bearer resources without notification
Option 3: Generate a PMIP detach/tunnel deactivation event to be delivered to the DF2 (if available)
Option 4: Initiate a periodic routing update to all neighboring eNodeBs
Explanation: In the context of lawful interception and PMIP-based S5/S8 architectures, when a Detach or PDN disconnection is identified at the PDN-GW, the protocol specifies generating a PMIP detach/tunnel deactivation event. This event notifies relevant elements (like DF2, if available) about changes in the user's connection status, ensuring seamless handling of lawful intercept requirements.