Question: In a 3GPP network with PMIP-based S5/S8 interfaces, what is the basis for Lawful Interception (LI) in the PDN-GW and LI LCS Client?
Option 1: One or more of NAI (Network Access Identifier), MSISDN (Mobile Subscriber Integrated Services Digital Network Number), IMEI (International Mobile Equipment Identity)
Option 2: Only IMSI (International Mobile Subscriber Identity) and MEID (Mobile Equipment Identifier)
Option 3: Solely based on IP address and port numbers of the IP-CAN session
Option 4: Exclusively on the correlation number provided by the MME
Explanation: This is correct because, according to the functional requirements for LI in case of E-UTRAN access and PMIP-based S5/S8 interfaces, interception in both the PDN-GW and the LI LCS Client is specified to be based on one or more of NAI, MSISDN, IMEI. This ensures that lawful interception can accurately target specific users or devices across different identifiers.