Question: What is the primary purpose of connecting the SMS-GMSC (Gateway Mobile Switching Center for Short Message Service) and SMS-IWMSC (IP Multimedia Subsystem Messaging Service Center) to the SGSN (Serving GPRS Support Node) via the Gd or Gdd interface?
Option 1: To enable the SGSN to support Short Message Service (SMS) functionalities.
Option 2: To facilitate direct voice call setup between UE (User Equipment) and the IMS (IP Multimedia Subsystem).
Option 3: For exclusive use of Location-Based Services (LBS) in GPRS networks.
Option 4: To manage QoS (Quality of Service) for dedicated video streaming services.
Explanation: The connection between the SMS-GMSC/SMS-IWMSC and the SGSN via the Gd or Gdd interface is specifically designed to support SMS services within the GPRS network. This setup allows for the integration of SMS functionalities with the packet-switched domain, enabling efficient message handling. The Gd/Gdd interfaces, whether based on MAP (Mobile Application Part) or Diameter protocols, serve this purpose by providing a standardized communication pathway.