Question: What is the primary purpose of the 'HS-DSCH Required Power Value' Information Element (IE) in UTRAN's Iub interface Node B Application Part (NBAP) signalling?
Option 1: To allocate buffer sizes for HS-DSCH connections based on traffic volume.
Option 2: To prioritize handover decisions for User Equipment (UE) with ongoing HS-DSCH sessions.
Option 3: To adjust the modulation scheme for individual HS-DSCH channels dynamically.
Option 4: To ensure sufficient power allocation to meet Guaranteed Bit Rates for all established HS-DSCH connections within a priority class.
Explanation: The correct answer reflects the essence of the HS-DSCH Required Power Value IE's purpose. It ensures that the minimum necessary power is allocated to meet the Guaranteed Bit Rate for all established HS-DSCH connections within a specified priority class, impacting resource management and QoS provisioning in UTRAN networks.