Question: In a scenario where a User Equipment (UE) is camped on an FDD cell and then reselects to a 1.28 Mcps TDD cell, what event marks the end of the cell re-selection delay?
Option 1: When the UE's cell quality level monitoring detects a better ranked cell.
Option 2: Upon completion of the RRC CONNECTION REQUEST message transmission.
Option 3: The moment the UE starts sending the SYNCH-UL sequence in the UpPTS for the RRC CONNECTION REQUEST.
Option 4: When the Location Registration on the new TDD cell is successfully acknowledged.
Explanation: The cell re-selection delay ends when the UE initiates a specific action towards connecting to the newly selected (better ranked) cell. Starting to send the SYNCH-UL sequence in the UpPTS for an RRC CONNECTION REQUEST message is this initiating action, marking the transition from evaluating cell quality to actively engaging with the new cell.