Question: What happens when a UE (User Equipment) attempts to initiate a Secondary PDP Context Activation Procedure for an existing emergency PDN Connection?
Option 1: The SGSN (Serving GPRS Support Node) will process the request and activate a new secondary context.
Option 2: The PDN GW/GGSN (Packet Data Network Gateway/Gateway GPRS Support Node) will redirect the request to a non-emergency APN (Access Point Name).
Option 3: The PDN GW/GGSN shall reject the UE's initiated Secondary PDP Context Activation Procedure for the emergency PDN Connection.
Option 4: The UE will automatically switch to a non-emergency PDN Connection.
Explanation: This is because, as per handling rules for emergency bearer services, once an emergency PDN connection is established, no modifications or additional activations are allowed to ensure dedicated resources for IMS emergency sessions. Thus, the network (specifically, the PDN GW/GGSN) must reject any such requests from the UE to maintain the integrity and priority of emergency services.