Question: In a Cell Broadcast Service (CBS) scenario, what does the Serial-Number field in a REPORT Response/Confirm primitive sent by the BSC/RNC to the CBC contain when responding to a WRITE-REPLACE primitive?
Option 1: The serial number of the newly broadcasted CB message for each cell.
Option 2: The old and new serial numbers for comparison purposes.
Option 3: A list of serial numbers for all pending CB messages.
Option 4: The new serial number, while the No-of-Broadcasts-Completed-List refers to the old message reference.
Explanation: When responding to a WRITE-REPLACE primitive, the Serial-Number field contains the new serial number. Notably, if the No-of-Broadcasts-Completed-List is present, it provides information on the broadcasts of the replaced CB message (identified by the old message reference), not the one corresponding to the new serial number included in the response.