Question: What is the maximum time allowed for a UE to start transmitting CQI to cell 2 after the beginning of time period T4, considering the cell change delay (Dcell_change)?
Option 1: Less than 74 ms
Option 2: Exactly 100 ms
Option 3: More than 120 ms but less than 150 ms
Option 4: Immediately, with no specified delay
Explanation: The UE needs to adapt quickly to changes in cell connections for seamless service continuity. The specified time of less than 74 ms ensures the UE can promptly start transmitting Channel Quality Indicator (CQI) reports to the new cell, facilitating efficient resource allocation and maintaining service quality during handovers.