Question: What is the primary trigger for a GW (PCEF) initiated IP-CAN Session modification when receiving a 'Create PDP Context Request' message, in terms of impact on the IP-CAN Session?
Option 1: Deletion of an existing PDP Context from the IP-CAN Session
Option 2: Modification of QoS for all existing PDP Contexts in the IP-CAN Session
Option 3: Update of traffic mapping information (TFT) for a specific PDP Context
Option 4: Addition of a new PDP Context to the IP-CAN Session with specific QoS requirements and TFT
Explanation: When a GW (PCEF) receives a 'Create PDP Context Request' message, it initiates an IP-CAN Session modification primarily by adding a new PDP Context to the existing IP-CAN Session. This addition includes defining specific Quality of Service (QoS) requirements and traffic mapping information (TFT) for the newly created PDP Context, ensuring tailored network resource allocation for the new context.