Question: Upon receiving a message with an Information Element (IE) having semantically incorrect contents, but no specific reaction is defined in the specification for that IE, how should the receiving entity (e.g., MME or VLR) proceed?
Option 1: Reject the entire message and terminate the connection.
Option 2: Ignore the incorrect IE, process the rest of the message if possible, and send an SGsAP-STATUS message with "semantically incorrect message" cause only if processing the rest is not feasible.
Option 3: Attempt to correct the semantically incorrect IE based on contextual assumptions.
Option 4: Always return an error without attempting to process the rest of the message, regardless of its validity.
Explanation: This approach balances the need to maintain connectivity and process valid information when possible, with the necessity to handle errors gracefully. Ignoring the incorrect IE allows for partial message processing, reducing potential service disruptions. Sending an SGsAP-STATUS message with specific cause and returning the erroneous message (if further processing is impossible) ensures transparency and facilitates debugging or corrective actions. This method aligns with robust error handling principles in telecommunications, prioritizing both service continuity and error visibility.