Question: In an E-UTRAN, what is the primary purpose of the 'Source BSS to Target BSS Transparent Container' during handover procedures?
Option 1: To encrypt sensitive user data transmitted between the source and target base stations.
Option 2: For intra-RAT (Radio Access Technology) handovers within LTE networks to optimize resource allocation.
Option 3: To facilitate communication between EPC components for billing and charging purposes.
Option 4: To transparently pass radio-related information between the handover source and target, especially in inter-3GPP RAT handovers (e.g., from SAE/LTE to GERAN A/Gb mode).
Explanation: The 'Source BSS to Target BSS Transparent Container' is specifically designed for transparently passing radio-related information, crucial for seamless handovers between different radio access technologies (e.g., from LTE to GERAN A/Gb mode), ensuring necessary radio parameters are correctly configured in the target cell to maintain service continuity.