Question: In a Home Node B (HNB) Subsystem, what is the primary purpose of measuring 'Number of Downlink User Bits for PS DL 384 kbps Data Rate (non-HSDPA) above RLC'?
Option 1: To monitor uplink transmission errors in HSDPA-enabled networks.
Option 2: To derive the average downlink data throughput on non-HSDPA Radio Access Bearers (RABs) with a 384 kbps downlink data rate.
Option 3: To track the number of dropped calls due to congestion in the HNB network.
Option 4: To analyze the impact of handovers on packet-switched (PS) services.
Explanation: This measurement sums payload bits of acknowledged RLC PDUs for non-HSDPA RABs with a 384 kbps downlink data rate, allowing calculation of average downlink data throughput, crucial for performance management and optimization of packet-switched services in HNB subsystems, particularly for non-HSDPA scenarios.