Question: In a 3GPP-defined FDD system, what event marks the starting point for measuring the hard handover delay in a User Equipment (UE) that supports both FDD and TDD modes?
Option 1: Transmission of the first uplink Dedicated Physical Channel (DPCH) on the new cell
Option 2: End of the last Transmission Time Interval (TTI) containing an RRC message implying hard handover
Option 3: Receipt of the RRC Connection Reconfiguration message from the network
Option 4: Completion of the random access procedure on the new cell
Explanation: The correct answer is the end of the last Transmission Time Interval (TTI) containing an RRC (Radio Resource Control) message that implies a hard handover, triggering the start of the hard handover delay measurement, which ends with the transmission of the new uplink DPCH (Dedicated Physical Channel).