Question: In a 5G Core (5GC) connected scenario, excluding NB-IoT, what happens when timer T309 corresponding to Access Category '2' expires or is stopped, and timer T302 is not running?
Option 1: The UE initiates a new RRC connection setup for all Access Categories.
Option 2: The UE considers the barring for Access Category '2' to be alleviated.
Option 3: The UE stops all ongoing data transmissions for Access Category '2'.
Option 4: The UE informs upper layers about an error in timer management.
Explanation: According to the specified behavior for a UE connected to 5GC (excluding NB-IoT), when timer T309 corresponding specifically to Access Category '2' expires or is stopped, and provided that timer T302 is not running, the UE will consider the barring for this particular Access Category ('2') to be alleviated. This means the restrictions on accessing the network under this category are lifted, allowing the UE to attempt connections that were previously barred.