Question: In NG-RAN, what is the primary purpose of providing a Reference Location to a GNSS receiver in a User Equipment (UE), and what geodetic reference frame is mandated for this location estimate?
Option 1: To initiate handover procedures, using the NAD83 geodetic reference frame.
Option 2: To provide an initial location estimate with uncertainty for positioning, utilizing the WGS-84 geodetic reference frame.
Option 3: To enhance cellular network planning, using the ED50 geodetic reference frame.
Option 4: To secure UE positioning data, with the CGCS2000 geodetic reference frame.
Explanation: The correct answer is Option 2 because Reference Location assistance in NG-RAN is designed to aid the GNSS receiver by offering an a priori location estimate (which could be derived from methods like Cell-ID or OTDOA positioning) along with its uncertainty, thereby enhancing the positioning process. The mandated geodetic reference frame for this purpose, as per 3GPP specifications, is indeed WGS-84, ensuring global consistency in geographical coordinates. This is crucial for accurate and efficient UE positioning in various environments.