Question: What is the primary purpose of S1 CDMA2000 Tunnelling procedures in E-UTRAN to CDMA2000 interworking?
Option 1: To optimize data transfer speeds between UE and the network.
Option 2: To facilitate seamless handover and pre-registration signalling between E-UTRAN and CDMA2000 networks for various services.
Option 3: To enhance security by encrypting all signalling messages between the UE and the network.
Option 4: To manage Quality of Service (QoS) parameters for CS domain services.
Explanation: The correct answer highlights the main objective of S1 CDMA2000 Tunnelling procedures, enabling smooth mobility (handovers) and pre-registration processes between E-UTRAN and CDMA2000 networks, supporting HRPD and 1xRTT for CS fallback services. Options 1, 3, and 4 are incorrect as they don’t represent the primary purpose of these procedures in this context.