Question: In E-UTRAN Dual Connectivity (EN-DC) scenario, what is managed jointly by the Master eNodeB (MeNB) and secondary gNodeB (en-gNB) for User Equipment (UE) at the Secondary eNodeB (SeNB)?
Option 1: Only Control Plane tunnels over S1
Option 2: Establishment, modification, and release of UE context, as well as user plane tunnels over X2
Option 3: Radio Resource Management exclusively for the Master Cell Group
Option 4: Billing and Charging procedures for data sessions
Explanation: In the context of E-UTRAN Dual Connectivity (EN-DC), effective management of UE resources is crucial. The correct answer highlights that both MeNB and en-gNB collaboratively manage key aspects: the establishment, modification, and release of UE context at the SeNB, ensuring seamless connectivity, and control user plane tunnels over X2, facilitating efficient data transfer between the nodes. This joint management is essential for optimizing Dual Connectivity benefits, such as enhanced throughput and reduced latency.