Question: Which network entity is responsible for initiating Sx session management procedures (establishment, modification, termination) in the context of Control and User Plane Separation (CUPS) architecture?
Option 1: UP Function (e.g., SGW, PGW, TDF)
Option 2: CP Function
Option 3: UE (User Equipment)
Option 4: EPC (Evolved Packet Core) as a whole
Explanation: In the Control and User Plane Separation (CUPS) architecture, the Control Plane (CP) function is responsible for managing and controlling the sessions, including initiating procedures for establishing, modifying, or terminating Sx sessions. This is crucial for efficiently handling user plane data processing and forwarding in a separated architectural setup, ensuring flexibility and scalability in telecom networks.