Question: In an EN-DC operation, when an IAB-MT migrates within the same IAB-donor-CU using SCG SRB, what distinguishes this intra-CU topology adaptation procedure from its SA scenario counterpart?
Option 1: The target parent node always uses the same IAB-donor-DU as the source parent node.
Option 2: The UE CONTEXT SETUP REQUEST message includes CG-ConfigInfo in step 3 of the procedure.
Option 3: The source path and target path never share common nodes.
Option 4: This procedure is initiated by the UE (User Equipment) instead of the network.
Explanation: In EN-DC operations with SCG SRB for IAB-node, the key distinction in the intra-CU topology adaptation procedure, compared to its SA scenario counterpart, lies in the inclusion of CG-ConfigInfo within the UE CONTEXT SETUP REQUEST message during step 3, highlighting a nuanced difference in procedural steps based on the operational mode (NSA vs. SA).