Question: What action does the User Equipment (UE) take after receiving an LTM cell switch command MAC CE?
Option 1: The UE initiates a random access procedure to establish a new connection.
Option 2: The UE performs a MAC reset and always re-establishes RLC and recovers PDCP data.
Option 3: The UE performs a MAC reset, but the decision to re-establish RLC and recover PDCP data is controlled by the network through RRC signalling.
Option 4: The UE ignores the command and continues with the existing connection.
Explanation: After receiving an LTM cell switch command MAC CE, the UE performs a MAC reset. However, whether it also re-establishes RLC (Radio Link Control) and recovers PDCP (Packet Data Convergence Protocol) data during this process is not automatic but is instead explicitly controlled by the network through RRC (Radio Resource Control) signalling. This allows the network to manage the UE's actions based on specific conditions or requirements, ensuring efficient use of resources and minimizing potential disruptions.