Question: What is the primary purpose of the MME CP Relocation Indication procedure in an Evolved Universal Terrestrial Radio Access Network (E-UTRAN)?
Option 1: To optimize User Equipment (UE) battery life during idle mode.
Option 2: To inform the Serving Gateway about UE's QoS profile update.
Option 3: To initiate a handover for UEs using only User Plane CIoT EPS Optimisation.
Option 4: To notify the eNB of an impending relocation of a UE's connection to another eNB, specifically for UEs utilizing Control Plane CIoT EPS Optimisation.
Explanation: The correct answer is Option 4 because the MME CP Relocation Indication procedure is specifically designed to inform the eNodeB (eNB) about relocating a User Equipment's (UE) connection to another eNB. This relocation is particularly pertinent for UEs that are using Control Plane Cellular Internet of Things (CIoT) Evolved Packet System (EPS) Optimisation, highlighting the procedure's focus on efficient management of such optimized connections within the E-UTRAN.