Digital broadcasting system and method of processing data in digital broadcasting system

A digital television (DTV) located inside an independent room among a plurality of rooms in a public hotel, wherein the DTV includes an access point (AP) card, the digital television (DTV) comprising:

• a first receiver for receiving display type information from a compact wireless device located within the independent room, wherein the display type information is type information of data capable of being processed by the compact wireless device;
• a transmitter for transmitting the received display type information to a management server;
• a second receiver for receiving general additional information and additional information and additional information dependent on the display type information from the management server;
• and
• a controller for controlling the general additional information to be displayed on the DTV, and transmitting the additional information dependent on the display type information to the compact wireless device,
• wherein the AP card includes a hotel room number, a guest name, and a predetermined unique wired equivalent privacy (WEP) key value matching with a WEP key value of the compact wireless device located within the independent room,
• wherein the AP card further includes a plurality of applications that include a first application for use in the compact wireless device, a second application for use in a general wireless device, and a third application corresponding to the first application for the compact wireless device, and
• wherein in order to synchronize data between the first application and the third application, a network of each application is always maintained in an active status.