Question: In the context of IP Multimedia Subsystem (IMS) as per 3GPP specifications, which of the following statements regarding roaming interfaces in 5G Core Service (5GS) is accurate?
Option 1: Roaming interfaces between vPCF (Virtual Policy and Charging Function) and hPCF (Home Policy and Charging Function) are fully supported in the current Release.
Option 2: Support for roaming interfaces between vPCF and hPCF in 5GS is contingent upon EPS (Evolved Packet System) core network deployment.
Option 3: There is no support for roaming interface between vPCF and hPCF in the current Release of the 5GS specification.
Option 4: GPRS Core Network architecture inherently includes support for vPCF to hPCF roaming interfaces in 5GS deployments.
Explanation: This is correct because, as stated, the current Release of the 5GS specification explicitly does not support roaming interfaces between the virtual Policy and Charging Function (vPCF) and the home Policy and Charging Function (hPCF). This limitation highlights an important consideration for operators planning 5G deployments, particularly in scenarios involving international roaming or network sharing.