Question: In the context of Network Slice charging based on 5G data connectivity, what is a prerequisite for utilizing existing Nchf capabilities exposed by CHF to SMF for individual UE charging?
Option 1: The Mobile Network Operator (MNO) serving the UE must also be acting as the Network Slice (NS) Tenant(s).
Option 2: The UE must always use a shared S-NSSAI across all Tenants.
Option 3: Roaming scenarios must be supported by the MNO's Converged Charging system.
Option 4: A unique S-NSSAI is required for each individual UE.
Explanation: This is correct because the existing Nchf capabilities can be used for Network Slice usage charging when the Mobile Network Operator (MNO) serving the UE is also acting as the Network Slice (NS) Tenant(s). This alignment is necessary for seamless integration of individual UE 5G data connectivity charging with Network Slice charging.