Question: In UTRAN Iur interface RNSAP signalling, when RNC1 initiates a measurement with 'SFN-SFN Observed Time Difference' as the Common Measurement Type, how does RNC2 report measurements for neighboring cells in the COMMON MEASUREMENT REPORT?
Option 1: All neighboring cell measurements are reported in the Successful Neighbouring Cell List IE, regardless of availability.
Option 2: Only successful measurements for neighboring cells are reported, with no indication of unsuccessful ones.
Option 3: Measurements for all neighboring cells, both successful and unsuccessful, are combined in a single IE without differentiation.
Option 4: RNC2 includes all available measurements in the Successful Neighbouring cell SFN-SFN Observed Time Difference Measurement Information IE and lists cells with no measurement result in the Unsuccessful Neighbouring cell SFN-SFN Observed Time Difference Measurement Information IE.
Explanation: This is correct because, according to the specification, when the Common Measurement Type is 'SFN-SFN Observed Time Difference', RNC2 must differentiate between neighboring cells with available measurements and those without, ensuring comprehensive reporting while maintaining clarity on measurement availability.