Question: What is the primary purpose of the 'DL PRB Usage per SSB' measurement in a 5G NR cell, and how can its output be optionally characterized?
Option 1: To measure uplink transmission power, with optional splitting by Mobility Management states.
Option 2: To track downlink physical resource block usage, split only by Non-GBR QoS resource type.
Option 3: To monitor cell throughput, with optional detailed views per SSB beam but not by QoS resource types.
Option 4: To provide the percentage of downlink physical resource block usage per SSB beam, optionally further divided into sub-counters for different QoS resource types (Non-GBR, GBR, Delay-critical GBR).
Explanation: This measurement assesses understanding of 5G performance metrics. The correct answer accurately reflects the 'DL PRB Usage per SSB' metric's purpose (downlink PRB usage percentage per SSB beam) and its optional granularity by QoS resource types, aligning with telecom network resource management and optimization.