Question: What is the primary objective of the inter-RAT cell change order to E-UTRAN procedure in wireless communications?
Option 1: To establish a new connection between UE (User Equipment) and E-UTRAN while releasing resources in the same RAT (Radio Access Technology).
Option 2: To perform load balancing between different cells within the same E-UTRAN network.
Option 3: To facilitate handover from E-UTRAN to another radio access technology like GSM/GPRS.
Option 4: To transfer an existing connection from a non-E-UTRAN radio access technology (e.g., GSM/GPRS) to E-UTRAN under the control of the source RAT.
Explanation: The correct answer aligns with the procedure's purpose. Transferring a connection from another radio access technology (like GSM/GPRS) to E-UTRAN, controlled by the source technology, is the primary objective. This ensures seamless UE connectivity while switching between different radio access technologies, highlighting its importance in maintaining continuous service in heterogeneous network environments.