Question: In an E-UTRAN Dual Connectivity (DC) operation, what are the two roles that eNBs involved in DC for a certain UE may assume?
Option 1: Master Cell Group (MCG) and Secondary Cell Group (SCG)
Option 2: Master eNB (MeNB) and Secondary eNB (SeNB)
Option 3: Serving Gateway (S-GW) and Packet Data Network Gateway (P-GW)
Option 4: Home eNB (HeNB) and Macro eNB
Explanation: In the context of E-UTRAN Dual Connectivity, two eNBs are involved to provide radio resources to a UE. These eNBs can take on specific roles: one acts as the Master eNB (MeNB), typically handling signaling and some data transmission, while the other acts as the Secondary eNB (SeNB), providing additional radio resources to enhance throughput or coverage. This setup is crucial for managing dual connectivity efficiently within the E-UTRAN architecture.