Question: What is the primary purpose of the Alternative RAB Parameter Values Information Element (IE) in UTRAN Iu interface RANAP signalling?
Option 1: To initiate RAB QoS negotiation for specific parameters and optionally suggest alternative values, or to request an alternative RAB configuration by the Radio Network Controller (RNC).
Option 2: To confirm the final RAB configuration after negotiation between the RNC and the Core Network.
Option 3: To terminate an existing RAB due to QoS parameter mismatch.
Option 4: To request additional RAB parameters not initially specified in the setup.
Explanation: The correct answer accurately reflects the dual purpose of the Alternative RAB Parameter Values IE: facilitating RAB QoS negotiation (including suggesting alternative values) and enabling the RNC to request an alternative RAB configuration, highlighting its role in flexible radio resource management and QoS adjustment in UTRAN networks.