Question: In a 3GPP-compliant IMS network, when an originating P-CSCF needs to retrieve network-provided location information before forwarding a SIP INVITE request due to operator policy, what does it include in the AA-Request sent to the PCRF?
Option 1: Only the 'ACCESS_NETWORK_INFO_REPORT' value within the Specific-Action AVP
Option 2: Only the required access network information within the Required-Access-Info AVP
Option 3: The SIP INVITE request itself for direct forwarding
Option 4: Both the 'ACCESS_NETWORK_INFO_REPORT' value within the Specific-Action AVP and the required access network information within the Required-Access-Info AVP
Explanation: According to specified behavior, when an originating P-CSCF needs location information before forwarding a SIP INVITE due to operator policy, it sends an AA-Request including two key pieces: The 'ACCESS_NETWORK_INFO_REPORT' value in the Specific-Action AVP and required access network info in the Required-Access-Info AVP. This ensures the PCRF can provide necessary location details for forwarding the SIP request.