Question: Which entity can initiate the Non-IP Data Delivery (NIDD) configuration procedure in a 5G System, according to 3GPP specifications?
Option 1: Only the Access and Mobility Management Function (AMF)
Option 2: Only the User Equipment (UE)
Option 3: Either the Serving and Packet Data Network Gateway (SGW/PGW) or the Mobility Management Entity (MME)
Option 4: Either the Network Exposure Function (NEF) or the Application Function (AF)
Explanation: In a 5G System, the NIDD configuration procedure is designed to be flexible in its initiation. According to the specifications, both the Network Exposure Function (NEF), which manages exposure of capabilities and events, and the Application Function (AF), which utilizes these exposures for service logic, have the capability to trigger the NIDD configuration. This dual capability ensures that either party can initiate the setup for non-IP data delivery as needed, enhancing the system's adaptability and responsiveness to different service requirements.