Question: What is the primary purpose of the 'Requested RAB Parameter Values' Information Element (IE) in UTRAN Iu interface Radio Access Network Application Part (RANAP) signalling?
Option 1: To confirm the currently allocated RAB parameters for an ongoing session.
Option 2: To notify the network of a UE's (User Equipment) change in location.
Option 3: To either request different values for specified RAB parameters or to trigger the execution of an alternative RAB configuration.
Option 4: To acknowledge receipt of RAB parameter updates from the network.
Explanation: The correct answer, Option 3, aligns with the described purpose of the 'Requested RAB Parameter Values' IE, which is to facilitate requests for alternative values of specified Radio Access Bearer (RAB) parameters or to initiate the use of a different RAB configuration. This is crucial in managing and optimizing data transfer sessions over the UTRAN network, ensuring that communication resources are allocated efficiently based on the requested parameters or an alternative setup.