Method and apparatus for controlling access to machine-type communication device having dual priority application

A signaling control method executed by a mobility management entity in a mobile communication network, the signaling control method comprising:

• receiving an attach request including a low access priority from a User Equipment (UE);
• transmitting an attach rejection message including a value for a back-off timer to the UE;
• receiving one of the attach request which does not include the low access priority and the attach request including an indication which is not the low access priority from the UE while the back-off timer is running;
• determining whether the UE can perform a dual priority operation in which the low access priority is overridden;
• and
• performing an attach procedure when the UE can perform the dual priority operation.

A User Equipment (UE) configured to perform NAS signaling with a low access priority and associated with an indication that the low access priority can be overridden, the UE is configured to:

• perform one of a mobility management procedure and a session management procedure including the low access priority;
• receive a back-off timer due to one of a mobility management congestion control and a session management congestion control and operate the back-off timer;
• and
• perform one of the mobility management procedure and the session management procedure without including the low access priority.