Question: Upon receiving a RADIO LINK DELETION REQUEST for a non-existent Radio Link (RL) identified by specific IDs, how should Node B respond?
Option 1: Ignore the request and wait for a new command.
Option 2: Send an ERROR INDICATION message with a 'Non-Existent RL' cause.
Option 3: Respond with a RADIO LINK DELETION RESPONSE using the CRNC Communication Context ID from the request.
Option 4: Initiate a new Radio Link Setup procedure for the requested RL.
Explanation: When Node B receives a deletion request for an RL that doesn't exist, it logically responds with a completion message for the requested action (deletion) to confirm the outcome, using the provided context from the request, maintaining signaling consistency and clarity on the status of the requested operation between nodes in the UTRAN network.