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

A method for transmitting an emergency service message at a Base Station (BS) in a wireless communication system, the method comprising:

• determining a transmission time of an emergency service message;
• determining a waiting time for a Mobile Station (MS) to receive the emergency service message 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 message and the waiting time to receive the emergency service message;
• and
• transmitting a DownLink (DL)-MAP message comprising the generated broadcast control pointer IE to the MS.

A method for transmitting an emergency service message at a Base Station (BS) in a wireless communication system, the method comprising:

• determining whether there exists an emergency service message 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 message to be transmitted in the MBS region;
• and
• transmitting a DownLink (DL)-MAP message comprising the MBS_MAP IE with the set field to the MS.

A method for receiving an emergency service message 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 message and information relating to a waiting time for the MS to receive the emergency service message at the transmission time using the received broadcast control pointer IE;
• and
• receiving the emergency service message during the waiting time at the transmission time of the emergency service message.

A method for receiving an emergency service message at a Mobile Station (MS) in a wireless communication system, the method comprising:

• receiving a Multicast and Broadcast Service (MBS)_MAP Information Element (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 message to be transmitted in an MBS region;
• and
• when the field setting indicates the existence of the emergency service message to transmit in the MBS region, decoding an MBS MAP message.

An apparatus for receiving an emergency service message 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 at least one of a Connection IDentifier (CID) used to transmit the emergency service message and information relating to a type of a Convergence Sublayer (CS) for processing the emergency service message by analyzing a Downlink Channel Descriptor (DCD) message from the MAC PDU decoder;
• and
• the receive data queue for providing the emergency service message from the MAC PDU decoder to a corresponding CS.