Question: In IRAT Measurement Configuration for UTRAN Iu interface (RANAP), what happens when both RSRP and RSRQ thresholds are present in the IE, regarding triggering a HO Report to another RAT?
Option 1: The UE sends a HO Report if either the RSRP or RSRQ measurement exceeds its respective threshold for any source RAT cell.
Option 2: The UE sends a HO Report only if both RSRP and RSRQ measurements exceed their respective thresholds for at least one source RAT cell.
Option 3: The UE averages RSRP and RSRQ measurements over the measurement duration and sends a HO Report if the average exceeds either threshold.
Option 4: No HO Report is sent to another RAT when both thresholds are present; it's only applicable for intra-UMTS handovers.
Explanation: According to the IRAT Measurement Configuration specifications, when both RSRP (Reference Signal Received Power) and RSRQ (Reference Signal Received Quality) thresholds are specified, the received radio measurements from the UE must exceed **both** the RSRP and RSRQ thresholds for at least one source RAT cell (or collectively for a group of cells providing such coverage) to trigger sending a HO Report to another RAT. This ensures that handover decisions are based on both signal power and quality, enhancing the reliability of inter-system handovers.