Question: In E-UTRA handover testing, what is the maximum allowed time for a User Equipment (UE) to complete transmitting all repetitions of the Physical Random Access Channel (PRACH) to the target cell after initiating handover at time period T3?
Option 1: Less than 100 ms from the beginning of time period T3
Option 2: Less than 150 ms from the start of the handover procedure
Option 3: Immediately after the RRC procedure is initiated
Option 4: Less than 170 ms from the beginning of time period T3
Explanation: This answer aligns with E-UTRA handover test requirements, ensuring efficient handovers within defined constraints, impacting network performance and user experience. Options 1, 2, and 3 either underestimate the allowed time or misinterpret the initiation point of the timing constraint.