Question: In a Cell Broadcast Service (CBS), when the user information is less than 82 octets in a CBS-Message-Information-Page, what is required for the remaining octets?
Option 1: Leave the remaining octets empty to reduce transmission overhead.
Option 2: Fill the remaining octets with a repeating pattern of the last byte of user information.
Option 3: Fill the remaining octets with padding (as specified in standards for Alphabets and language-specific information).
Option 4: Truncate the CBS-Message-Information-Page to the length of the user information.
Explanation: To maintain a fixed length and ensure compatibility across different systems, padding is necessary. This ensures the CBS-Message-Information-Page always meets its specified length of 82 octets, even when the actual user information is shorter, supporting transparent passing of content from the Cell Broadcast Centre to the Mobile Station/User Equipment without data loss or misinterpretation.