Question: In a Network-initiated NBIFOM mode, who assigns the NBIFOM routing rule identifier used in Gx interface for a new packet filter, and where is it included?
Option 1: UE assigns the identifier, which is included in the Flow-Information AVP of the PCC rule.
Option 2: PCRF assigns the identifier, which is included in the Routing-Rule-Identifier AVP within the Flow-Information AVP of the PCC rule.
Option 3: PCEF assigns the identifier, which is included in a new NBIFOM routing rule only if the UE initiates an IP flow mapping request.
Option 4: Both PCRF and PCEF jointly assign the identifier, with details shared through GTP signaling.
Explanation: In Network-initiated NBIFOM mode, the PCRF is responsible for assigning the NBIFOM routing rule identifier to be used in Gx interface. This assigned identifier is then included within the Routing-Rule-Identifier AVP of the Flow-Information AVP in the PCC rule, ensuring seamless communication and rule application between the PCRF and PCEF for packet filters.