In the TSG Structure, which TSG is handling User Equipment - Core Network protocols?a.RANb.SAc.CTd.SO

To determine which TSG (Technical Specification Group) is responsible for User Equipment - Core Network protocols in the TSG structure, we can analyze the functions of the different TSGs within the 3GPP (3rd Generation Partnership Project) framework:

1. RAN (Radio Access Network): This group primarily focuses on the radio access network standards and specifications. It deals with protocols related to the air interface, which means its scope does not cover the core network protocols.

2. SA (Service and System Aspects): This group deals with overall system architecture and service aspects but is not specifically focused on User Equipment to Core Network protocols.

3. CT (Core Network and Terminals): This group is responsible for the protocols and standards related to the core network and the terminals (User Equipment). This includes handling the signaling and management protocols that interface between the user equipment and the core network.

4. SO (Service Operation): This group typically deals with service operation aspects but does not cover the core network protocols directly related to User Equipment.

Final Answer

The correct answer is c. CT (Core Network and Terminals) as it handles User Equipment - Core Network protocols.