Secure method for MTC device triggering

A method of a server that performs device trigger for a mobile communication system, comprising:

• sending a trigger message including a first information on a lifetime to a first node that connects to the server;
• and
• re-sending the trigger message if the trigger message does not reach a UE (User Equipment) within the lifetime,
• wherein the first node checks whether the server is authorized to send the trigger message, and sends the trigger message to the UE based on the first information via a second node that performs mobility management.

A first node that connects to a server for a mobile communication system, comprising:

• a transceiver configured to receive a trigger message including a first information on a lifetime from the server that performs device trigger;
• and
• a controller configured to control the transceiver to check whether the server is authorized to send the trigger message;
• and
• a sender configured to send the trigger message to a UE (User Equipment) based on the first information via a second node that performs mobility management,
• wherein the server re-sends the trigger message if the trigger message does not reach the UE within the lifetime.

A method of a first node that connects to a server for a mobile communication system, comprising:

• receiving a trigger message including a first information on a lifetime from the server that performs device trigger;
• checking whether the server is authorized to send the trigger message;
• and
• sending the trigger message to a UE (User Equipment) based on the first information via a second node that performs mobility management,
• wherein the server re-sends the trigger message if the trigger message does not reach the UE within the lifetime.

A UE (User Equipment) for a mobile communication system, comprising:

• a transceiver configured to receive a trigger message via a second node that performs mobility management from a first node that connects to a server;
• and
• a controller configured to control the transceiver to send a trigger response to the first node via the second node in response to the received trigger message,
• wherein the server performs device trigger, sends the trigger message including a first information on a lifetime to the first node, and re-sends the trigger message if the trigger message does not reach the UE within the lifetime, and
• the first node checks whether the server is authorized to send the trigger message.

A method of a UE (User Equipment) for a mobile communication system, comprising:

• receiving a trigger message via a second node that performs mobility management from a first node that connects to a server;
• and
• sending a trigger response to the first node via the second node in response to the received trigger message,
• wherein the server performs device trigger, sends the trigger message including a first information on a lifetime to the first node, and re-sends the trigger message if the trigger message does not reach the UE within the lifetime, and
• the first node checks whether the server is authorized to send the trigger message.