Question: In UTRAN Performance Management, what triggers the increment of RAB-related measurements for PS domain, specifically for each relevant traffic class?
Option 1: Receipt of a RANAP IU RELEASE CONFIRM message at the RNC
Option 2: Transmission by the RNC of a RANAP IU RELEASE REQUEST message for CS domain
Option 3: Establishment of a new RAB for PS domain with a specific traffic class
Option 4: Transmission by the RNC of a RANAP IU RELEASE REQUEST message for PS domain
Explanation: The correct answer is tied to the specific event that increments the RAB-related measurements for the PS (Packet Switched) domain. This event is the transmission of a RANAP IU RELEASE REQUEST message specifically for the PS domain, which triggers the addition of each related RAB to the measurement counters based on their traffic class. This ensures accurate tracking of resource releases in the UTRAN's performance management.