Question: What action does the P-CSCF take upon receiving an indication that an IMS emergency session is established, and what additional information does it include in its communication with the PCRF?
Option 1: The P-CSCF revokes existing IMS service information and includes a non-emergency indication when sending new IMS service information to the PCRF.
Option 2: The P-CSCF sends IMS service information to the PCRF, including an emergency-related indication, to differentiate the session type.
Option 3: The P-CSCF requests the PCRF for UE location information and includes a generic session indicator in its communication with the PCRF.
Option 4: The P-CSCF terminates all ongoing non-emergency sessions and only then sends IMS service information without any specific emergency indication to the PCRF.
Explanation: Upon establishing an IMS emergency session, the P-CSCF needs to inform the PCRF about this specific type of session. Including an emergency-related indication is crucial for the PCRF to apply the appropriate policies and charging rules for emergency services, ensuring priority handling and possibly waiving certain charges. This differentiation supports the timely and reliable delivery of emergency communications.