Question: Over which Logical Channel is the RRC CONNECTION SETUP message typically transmitted from the SS (Serving System) to the UE (User Equipment) during transition to connected mode CELL_DCH?
Option 1: DCCH (Dedicated Control Channel)
Option 2: DTCH (Dedicated Traffic Channel)
Option 3: BCCH (Broadcast Control Channel)
Option 4: CCCH (Common Control Channel)
Explanation: The RRC CONNECTION SETUP message is sent on the CCCH (Common Control Channel) because it is used for control information that is not dedicated to a single UE, such as during the initial setup when the UE does not yet have a dedicated connection. This aligns with the role of CCCH in handling common control signaling, especially in scenarios where the UE is transitioning from idle to connected mode (CELL_DCH), and a dedicated channel has not been established yet.