Patent ID: 8539524

Claim:
A method for controlling a digital television (DTV) located in one independent space among a plurality of independent spaces physically separated from one another, wherein the DTV includes an access point (AP) card, the method comprising: receiving emergency alert information and independent space identification (ID) information from a management server; comparing independent space ID information pre-stored in the DTV with the received independent space ID information; parsing the emergency alert information, if the pre-stored independent space ID information is identical to the received independent space ID information; switching an operation mode of the DTV from a power-off mode to a wake mode on the basis of the parsed emergency alert information, and displaying an emergency alert message; receiving independent space ID information recorded in a storage area of a compact wireless device and a wired equivalent privacy (WEP) key value of the compact wireless device; receiving a WEP key value corresponding to the AP card of the DTV from the management server; comparing the WEP key value received from the compact wireless device with the WEP key value received from the management server; and transmitting the received emergency alert information to the compact wireless device.