Question: What is a primary purpose of collecting E-RAB (E-UTRAN Radio Access Bearer) establishment performance measurements on a per QCI (QoS Class Identifier) basis for operators?
Option 1: To optimize HeNB (Home enhanced Node B) hardware resources
Option 2: To evaluate the overall network coverage area
Option 3: To compare different UE (User Equipment) device performances
Option 4: To assess the quality of specific services and troubleshoot E-RAB establishment failures
Explanation: Collecting E-RAB performance measurements on a per QCI basis allows operators to gauge the quality of specific services, which is crucial for ensuring user experience and identifying issues with E-RAB establishment. This aligns with the telecom concept of service assurance and Quality of Service (QoS) management, enabling targeted improvements in network and service delivery.