Question: In a TDD (1.28 Mcps option) UE, what is the primary factor excluded from the measurement reporting delay during an event-triggered reporting period?
Option 1: Propagation delay over the Uu interface
Option 2: Processing time for inter-frequency measurements
Option 3: Time spent on GSM measurements before reporting
Option 4: Delay uncertainty when inserting reports into the TTI of the uplink DCCH
Explanation: According to the specifications, the measurement reporting delay in a TDD (1.28 Mcps option) UE excludes the delay uncertainty that occurs when the measurement report is inserted into the Transmission Time Interval (TTI) of the uplink Dedicated Control Channel (DCCH). This specific exclusion highlights the focus on measuring the UE's inherent reporting latency, separate from variability introduced by the scheduling of reports within the uplink transmission structure.