Patent ID: 8374127

Claim:
A method for controlling a mobile device capable of accessing an access point (AP) card of a digital television (DTV) located in one independent space among a plurality of independent spaces physically separated from one another, the method comprising: accessing a management server using the AP card; downloading an in-room control application from the management server; requesting an authentication to the AP card, wherein the AP card transmits a lock request signal to the management server, receives a lock signal and transmits an encrypted AP card ID using the lock signal to the management server; executing the downloaded in-room control application enabling a user to control device of the independent space using the AP card and DTV, wherein the AP card supports a multi-protocol interface to control devices of the independent spaces and the DTV displays a list and positions of the devices; requesting a unique access code from the management server using the AP card, wherein the unique access code is mapped to both an identifier (ID) of the AP card and an available term assigned to a current guest staying in the independent space; receiving the unique access code from the management server, if the management server completes verification by decrypting the encrypted AP card ID; and transmitting a command signal for changing a status of a controllable device contained in the independent space and the received unique access code to the AP card of the DTV.