Question: In a UTRA FDD network, when a User Equipment (UE) is in soft handover, how are Transmit Power Control (TPC) commands received from different cells in the active set utilized to determine the required uplink power step?
Option 1: All TPC commands from the active set are averaged to determine the power step.
Option 2: Only the TPC command from the strongest cell in the active set is used for determining the power step.
Option 3: TPC commands received in the same slot from different cells are combined as per specifications to determine the required uplink power step (TPC_cmd).
Option 4: The UE ignores TPC commands from all but the serving cell when in soft handover.
Explanation: In a soft handover scenario, a UE can receive TPC commands from multiple cells simultaneously. To manage this, telecom standards dictate that these commands should be combined in a specific manner to ensure the UE adjusts its uplink power appropriately, maintaining optimal network performance and minimizing interference.