Apparatuses and methods for providing emergency service in a wireless communication system

A method for transmitting an emergency service information at a base station (BS) in a wireless communication system, the method comprising:

• determining a transmission time of an emergency service information;
• determining a waiting time for a mobile station (MS) to receive the emergency service information at the determined transmission time;
• generating a broadcast control pointer information element (IE) which comprises information relating to the transmission time of the emergency service information and the waiting time to receive the emergency service information;
• and
• transmitting a downlink (DL)-MAP message comprising the generated broadcast control pointer IE to the MS.

A method for transmitting an emergency service information at a base station (BS) in a wireless communication system, the method comprising:

• determining whether there exists the emergency service information to transmit in a multicast and broadcast service (MBS) region;
• setting a field in an MBS_MAP information element (IE) according to the determination, the field indicative of the presence or absence of the emergency service information to be transmitted in the MBS region;
• when it is determined that the emergency service information exists, determining a transmission time of the emergency service information and a waiting time for a mobile station (MS) to receive the emergency service information at the determined transmission time;
• generating a broadcast control pointer information element (IE) which comprises information relating to the transmission time of the emergency service information and the waiting time to receive the emergency service information;
• and
• transmitting a downlink (DL)-MAP message comprising the MBS_MAP IE with the set field or the broadcast control pointer IE to the MS.

A method for receiving an emergency service information at a mobile station (MS) in a wireless communication system, the method comprising:

• receiving a broadcast control pointer information element (IE) through a downlink (DL)-MAP message;
• acquiring a transmission time of the emergency service information and information relating to a waiting time for the MS to receive the emergency service information at the transmission time using the received broadcast control pointer IE;
• and
• receiving the emergency service information during the waiting time at the transmission time of the emergency service information.

A method for receiving an emergency service information at a mobile station (MS) in a wireless communication system, the method comprising:

• receiving a broadcast control pointer (IE) or a multicast and broadcast service (MBS)_MAP IE through a downlink (DL)-MAP message;
• confirming setting of a field in the received MBS_MAP IE, the field indicative of the presence or absence of the emergency service information to be transmitted in an MBS region;
• acquiring a transmission time of the emergency service information to receive the emergency service information at the transmission time using the received broadcast control pointer IE;
• acquiring a waiting time for the MS to receive the emergency service information at the determined transmission time;
• and
• when the field setting indicates the existence of the emergency service information to transmit in the MBS region, decoding an MBS MAP message.

An apparatus for transmitting an emergency service information of a base station (BS) in a wireless communication system, the apparatus comprising:

• a media access control (MAC) control message generator configured to allocate a connection identifier (CID) used to transmit the emergency service information, to determine a convergence sublayer (CS) type for processing the emergency service information, and to generate a control message comprising the allocated CID, and information relating to the determined CS type;
• and
• a transmitter configured to transmit the control message to a mobile station (MS),
• wherein the control message comprises a downlink channel descriptor (DCD) message.

An apparatus for receiving an emergency service information of a mobile station (MS) in a wireless communication system, the apparatus comprising:

• a receiver for receiving a signal;
• a physical layer decoder for providing a media access control (MAC) protocol data unit (PDU) by decoding the received signal in a physical layer;
• a MAC PDU decoder for analyzing a header of the MAC PDU, for providing a corresponding payload to a MAC control message analyzer when a payload of the MAC PDU comprises control information, and for providing a corresponding payload to a receive data queue when the payload of the MAC PDU comprises traffic;
• the MAC control message analyzer for acquiring a connection identifier (CID) used to transmit the emergency service information, and information relating to a type of a convergence sublayer (CS) for processing the emergency service information by analyzing a downlink channel descriptor (DCD) message from the MAC PDU decoder;
• and
• the receive data queue for providing the emergency service information from the MAC PDU decoder to a corresponding CS.