Question: What is the primary goal for introducing new charging and billing requirements in evolving 3GPP system releases, as per backward compatibility principles?
Option 1: To immediately obsolete all existing network equipment for enhanced security.
Option 2: To ensure seamless integration with future IoT devices only.
Option 3: To allow existing equipment to continue operating correctly with new implementations.
Option 4: To mandate the use of a specific vendor for all network upgrades.
Explanation: Backward compatibility in evolving 3GPP system releases aims to ensure that introducing new technical standards, such as those for charging and billing, doesn't disrupt existing equipment's functionality. This approach enables a smoother transition to new technologies, allowing operators to upgrade networks without replacing all existing infrastructure simultaneously. Thus, the primary goal is to maintain operational compatibility between old and new equipment.