Question: In UTRAN Iub interface NBAP signalling, for 'Periodic' and 'On Modification' reporting, what is indicated by 'Information Not Available' in the Requested Data Value Information IE?
Option 1: The entire requested data set is available but incomplete.
Option 2: All parts of the requested information were available at a previous reporting interval.
Option 3: At least one part of the requested information was not available when initiating the Information Reporting procedure.
Option 4: The Node B is experiencing a signalling failure preventing data retrieval.
Explanation: This option correctly reflects the scenario where, during 'Periodic' and 'On Modification' reporting, if any part of the requested data is missing at the start of the Information Reporting procedure, 'Information Not Available' is used. This ensures the receiver understands that the provided information might not be comprehensive, highlighting the importance of data integrity in telecom signalling for effective network management and decision-making.