Question: What is a key consideration for the SGW-C (Serving and Packet Data Network Gateway-Control plane) when selecting an appropriate SGW-U (Serving and Packet Data Network Gateway-User plane) to serve a UE (User Equipment), in addition to load balancing and location?
Option 1: The type of mobility management protocol used by the UE (e.g., GTP, PMIP).
Option 2: The capability of the UP function to support specific UE features, such as CIoT capabilities or dual connectivity with NR.
Option 3: The SGW-U's power consumption and carbon footprint to optimize network sustainability.
Option 4: The number of concurrent sessions the UE is expected to establish.
Explanation: The correct answer, Option 2, highlights the importance of matching the UP function's capabilities with the specific requirements of the UE session. This ensures that the selected SGW-U can support features like CIoT (Cellular Internet of Things) for IoT devices or dual connectivity with 5G New Radio (NR) for enhanced mobile broadband experiences. This consideration is crucial for fulfilling service requirements and providing seamless connectivity as outlined in the context of control and user plane separation of EPC nodes.