Question: During an E-UTRAN handover, what happens to downlink RLC (Radio Link Control) PDUs that remain at the source eNB after forwarding data to the target node?
Option 1: They are forwarded to the target node along with fresh S1 data.
Option 2: They are discarded by the source eNB.
Option 3: They are stored for potential retransmission to the UE via the target node.
Option 4: They are delivered to the UE directly from the source eNB after handover completion.
Explanation: Upon handover, the efficiency of the handover process is prioritized. To prevent data duplication and ensure seamless connectivity, the source eNB discards any remaining downlink RLC PDUs instead of holding onto them or attempting to forward them after the initial data forwarding to the target node.