Question: In E-UTRAN, what is the primary purpose of the Handover Restriction List Information Element (IE) in the context of mobility procedures?
Option 1: To manage QoS parameters for dedicated bearers during handover.
Option 2: To negotiate security keys between eNB and UE for encrypted transmission.
Option 3: To inform the UE about roaming or access restrictions for subsequent handovers, CCO, or SCG selection in dual connectivity.
Option 4: To optimize resource allocation for multicast/broadcast services during cell reselection.
Explanation: The Handover Restriction List IE conveys essential information from the eNB to the UE about restrictions on future mobility actions, including handovers, Cell Change Orders (CCO), and Secondary Cell Group (SCG) selections in dual connectivity. This ensures the UE is aware of limitations for seamless connectivity and service continuity, impacting its subsequent mobility decisions and maintaining network efficiency and user experience.