Question: What is the primary purpose of the 'MeNB initiated SgNB Modification Preparation' procedure in E-UTRAN, as utilized between Master eNodeB (MeNB) and secondary gNodeB (SgNB)?
Option 1: To establish a new X2 connection between MeNB and SgNB for handover preparation.
Option 2: For MeNB to request en-gNB to modify UE context, query SCG configuration for delta signalling support, or provide S-RLF-related information.
Option 3: To initiate a direct interface for User Equipment (UE) to communicate with the Serving and Packet Data Network Gateway (S/P-GW).
Option 4: To synchronize cell IDs between MeNB and SgNB for enhanced Inter-Cell Interference Coordination (ICIC).
Explanation: This option correctly outlines the multifaceted purpose of the 'MeNB initiated SgNB Modification Preparation' procedure, as defined. It accurately reflects the procedure's role in modifying UE context at the secondary node, querying Small Cell Group (SCG) configurations to support efficient signalling during SgNB changes initiated by the Master node, and sharing relevant Radio Link Failure (RLF)-related information. This aligns with optimizing network resource utilization and enhancing user experience through streamlined signalling processes.