Method and system for supporting emergency call using non-access stratum protocol in mobile telecommunication system

A method for an emergency call service by a Mobility Management Entity (MME), the method comprising:

• receiving an attach request message together with a first packet data network (PDN) connectivity request message from a terminal, wherein the first PDN connectivity request message includes request type information indicating a request for a connectivity to a PDN for an emergency bearer service;
• and
• transmitting an attach accept message including an indicator to the terminal, the indicator indicating whether the emergency bearer service is supported,
• wherein the connectivity to the PDN for the emergency bearer service is established if the indicator indicates that the emergency bearer service is supported.

A terminal for providing an emergency call service, the terminal comprising:

• a transmitter configured to transmit an attach request message together with a first packet data network (PDN) connectivity request message to a mobility management entity (MME), wherein the first PDN connectivity request message includes request type information indicating a request for a connectivity to a PDN for an emergency bearer service;
• and
• a receiver configured to receive an attach accept message including an indicator from the MME, the indicator indicating whether the emergency bearer service is supported,
• wherein the connectivity to the PDN for the emergency bearer service is established if the indicator indicates that the emergency bearer service is supported.

A Mobility Management Entity (MME) for providing an emergency call service, the MME comprising:

• a receiver configured to receive an attach request message together with a first packet data network (PDN) connectivity request message from a terminal, wherein the first PDN connectivity request message includes request type information indicating a request for a connectivity to a PDN for an emergency bearer service;
• and
• a transmitter configured to transmit an attach accept message including an indicator to the terminal, the indicator indicating whether the emergency bearer service is supported,
• wherein the connectivity to the PDN for the emergency bearer service is established if the indicator indicates that the emergency bearer service is supported.