Question: In a UMTS FDD network, what is the primary objective of downlink power control from the UE receiver's perspective?
Option 1: To maximize the downlink transmission power to ensure full coverage.
Option 2: To maintain a constant link quality regardless of network conditions.
Option 3: To converge to the required link quality set by the network while minimizing downlink power usage.
Option 4: To prioritize DCCH over DTCH for outer loop link adaptation.
Explanation: The correct answer reflects the essence of downlink power control in UMTS FDD networks. The UE aims to achieve the desired link quality (e.g., a specific BLER target) as mandated by the network, but with the added efficiency goal of using the lowest possible downlink power. This approach balances service quality with power efficiency, which is crucial for both network performance and UE battery life.