Question: In UTRAN Iu interface (RANAP signalling), when a Core Network (CN) sends a LOCATION RELATED DATA REQUEST to the Radio Network Controller (RNC) for dedicated assistance data delivery to a User Equipment (UE), what is expected in the RNC's response if the delivery is successful?
Option 1: A LOCATION RELATED DATA RESPONSE message containing the Broadcast Assistance Data Deciphering Keys IE.
Option 2: A LOCATION RELATED DATA RESPONSE message with no data included.
Option 3: An error message indicating successful delivery is not a valid response trigger.
Option 4: The RNC initiates another LOCATION RELATED DATA REQUEST to confirm UE reception.
Explanation: According to the described procedure for successful operation, if the CN requests dedicated assistance data delivery to the UE and this delivery is successfully completed by the RNC, the RNC responds with a LOCATION RELATED DATA RESPONSE message that contains no data. This indicates the completion of the requested action without needing to include additional data in the response.