Question: What is the primary purpose of the SAI (Service Area Identifier) IE in UTRAN Iu interface RANAP signalling?
Option 1: To uniquely identify individual User Equipment (UE) within a cell.
Option 2: To differentiate between PS (Packet Switched) and CS (Circuit Switched) domains in a cell.
Option 3: To indicate the geographical location of a cell to neighboring cells for handover purposes.
Option 4: To identify an area consisting of one or more cells, belonging to the same Location Area, for locating a UE relative to the Core Network (CN).
Explanation: The SAI IE is used to identify a Service Area, encompassing one or more cells within the same Location Area, crucial for indicating a User Equipment's (UE) location to the Core Network (CN), facilitating effective communication and resource allocation.